Re: [FFmpeg-user] 1920x1080p24 AVC to HEVC compression options?

[Lou Logan]

On Mon, Mar 30, 2020, at 10:17 AM, Lou Logan wrote:
>
> Use a lower -crf value:
>
> https://trac.ffmpeg.org/wiki/Encode/H.265

 ...and only now did I realize Moritz already answered this in a
 duplicate thread.

Please avoid asking duplicate questions.
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Re: [FFmpeg-user] 1920x1080p24 AVC to HEVC compression options?

[Lou Logan]

On Sun, Mar 29, 2020, at 10:24 PM, Mark Filipak wrote:
>
> However, it uses the x264 coder with compression that's too high 
> resulting in 'clay-face' or 
> 'plastic-face'. What I'd prefer is less compression and the x265 coder.
> 
> I can probably specify x265 with a '-c:v libx265' directive, but I 
> haven't found a way to specify 
> less compression. I look here: 
> https://ffmpeg.org/ffmpeg-codecs.html#libx265 but I don't see any 
> actual documentation...
> 
> ...any suggestions what Options and values I should use?

Use a lower -crf value:

https://trac.ffmpeg.org/wiki/Encode/H.265
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Re: [FFmpeg-user] Question on AVFoundation and importing from a DV-VCR

[Lou Logan]

On Sat, Mar 28, 2020, at 8:54 AM, Colin Bitterfield wrote:
> I am not exactly sure what a segment muxer is. Do you have an example?

See:
https://ffmpeg.org/ffmpeg-formats.html#segment
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Re: [FFmpeg-user] What is a sponsor?

[Lou Logan]

On Fri, Mar 27, 2020, at 8:37 AM, Nomis101 wrote:
>
> Oh, cool. That means I could also be a sponsor. If you say, willing to
> fund development, how much money are we talking about in general?

That's up to you to decide and if you can come to an agreement with any
interested developer.
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Re: [FFmpeg-user] What is a sponsor?

[Lou Logan]

On Thu, Mar 26, 2020, at 11:16 AM, Nomis101 wrote:
> In ticket 3595, I've learned, that a missing sponsor can hinder
> bringing in patches to FFmpeg [1]. But I still quite don't understand
> what a sponsor actually is. Because I don't want to spam the ticket
> with my non-developer question, I thought it might be better to ask in
> the mailinglist. What makes a sponsor so important to fix a ticket?
> How to find a sponsor for a ticket? And, what people can become a
> sponsor? Thanks.
>
> [1] https://trac.ffmpeg.org/ticket/3595#comment:15

A sponsor is simply a person or organization willing to fund development
of a feature or big fix that interests them. Anyone can be a sponsor.

A ticket does not need a sponsor, and the vast majority do not get
sponsored, but it may provide the initiative or motivation for it to get
implemented.

We have no official, standard process for sponsorship, but you can
mention that you are willing to be a sponsor in a comment in a bug
report/feature request on the bug tracker. The rest is up to you and any
interested developer(s).
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Re: [FFmpeg-user] Selecting MPEG TS child streams for filter_complex

[Lou Logan]

On Mon, Mar 16, 2020, at 12:37 PM, Carl Zwanzig wrote:
>
> Or is there another reason for listing inputs, then -filter_complex, then 
> outputs?

Simple reason I usually list them in that order is because it is easier
and more logical for me to process it in the form of:

inputs -> filters -> output

Which is a simplification of the diagrams in:
https://ffmpeg.org/ffmpeg.html#Detailed-description
https://ffmpeg.org/ffmpeg.html#Complex-filtergraphs
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Re: [FFmpeg-user] Problem with pixel format and/or missing constant

[Lou Logan]

On Wed, Mar 11, 2020, at 11:50 AM, Ulf Zibis wrote:
>
> Is it thinkable that libx264 could encode with constrained_baseline
> profile some day?

"-profile:v baseline" is Constrained Baseline. You can always refer to
the output of the ffmpeg command to see which profile is being used.

> Currently it only can decode it.

x264 is only an encoder, not a decoder.
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Re: [FFmpeg-user] Problem with pixel format and/or missing constant

[Lou Logan]

On Wed, Mar 11, 2020, at 10:51 AM, Ulf Zibis wrote:
>
> Does John van Sickle's binary use a current version?

See the build info / readme for a list of external library versions:
https://johnvansickle.com/ffmpeg/git-readme.txt

> How can I use a more current version with the ffmpeg git version?

You can compile it:
https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu
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Re: [FFmpeg-user] Development & Support

[Lou Logan]

On Fri, Feb 28, 2020, at 4:00 PM, Mark Filipak wrote:
>
> My area of interest is documentation. Currently, ffmpeg is documented by 
> the developers and, no offense intended, their documentation is poor. 
> Why wouldn't it be poor? Developers are not professional writers and 
> their perspective is not the users' perspective.

Donation of your time is more appreciated than funds. Have you
considered submitting a patch to improve documentation? As an
added bonus your name will be associated with the contribution
within the source code.

If that does not interest you then improving the wiki could be a
good start. It is intended to supplement the documentation and is
publicly editable.

https://trac.ffmpeg.org/#CommunityContributedDocumentation

For example the AV1 article is outdated and can be updated with
the addition of the encoder librav1e.

> > It's fairly informal since there is no standard or official process to do 
> > this.
> 
> The ffmpeg crew needs to think about it. It's important.

I don't disagree, but money is not the motivating factor for FFmpeg
development (or at least it isn't for me despite my finances), so
nobody has invested the time and energy to better organize
sponsorship and bounties.

What I would like to see is the project use its funds to pay developers,
but that's a different discussion.
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Re: [FFmpeg-user] Development & Support

[Lou Logan]

On Fri, Feb 28, 2020, at 9:52 AM, Mark Filipak wrote:
>
> Is there some way I can fund development? Is there some way I can fund 
> support? Perhaps as a subscription? (And, Yes, I'm aware of the "Donate" 
> options.)

PayPal is listed on the Donate page and allows you to make a monthly
donation, but we don't have a Patreon type of subscription model.

One method to fund development is to sponsor development in areas of
your interest, or put a bounty for a particular bug fix or feature request.
It might be a little more interesting for you than the typical donate
options.

It's fairly informal since there is no standard or official process to do this.
For example, find a ticket on the bug tracker and leave a comment to offer
to pay x amount to get it fixed/implemented. Or hang out in #ffmpeg-devel
IRC and ask there (not all developers participate in IRC, however).
Or contact a developer on the consulting page:

https://www.ffmpeg.org/consulting.html

There is also bountysource, but I have no experience with it and IIRC they
take a 10% cut.

https://www.bountysource.com/teams/ffmpeg/issues
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Re: [FFmpeg-user] amix fills 16Gb memory, ffmpeg killed

[Lou Logan]

On Thu, Feb 27, 2020, at 7:50 AM, S Andreason wrote:
> Hi,
> I am trying to join 11 video files, each 3 minutes in length. I can get 
> the video rendered correctly, where the audio only lasts 3 minutes from 
> input 0. But when I add the amix filter, it fills 16Gb of memory in 2 
> minutes and gets it's process killed.
> 
> The full command line and output, before and after adding
> ;amix=inputs=11:duration=longest
> are in this 43Kb text file:
> https://www.seahorsecorral.org/videos/tests/ffmpeg-killed-16Gb-memory-full.txt

That's a large command for us to have to parse. I recommend omitting 
anything that isn't required to reproduce the issue and to provide a minimal
command that still shows the problem. It will increase your chances to receive
answers. Provide a link to any files that are needed so we can try it if it 
can't
be reproduced with synthetic inputs (testsrc2 and sine filters for example).
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Re: [FFmpeg-user] More information about command options

[Lou Logan]

On Thu, Feb 27, 2020, at 5:34 AM, Moritz Barsnick wrote:
>
> (Caveat: Options may be documented without dashes. E.g. "-bf" may not
> be found as "-bf", but as "bf". That makes it a bit difficult for one
> or the other option.)

I submitted a patch to address that and to at least make it consistent, but
there were disagreements, so the sloppy status quo remains.
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Re: [FFmpeg-user] Explanation of how -r affects frame rate of filtergraph

[Lou Logan]

On Wed, Feb 26, 2020, at 4:02 PM, Peter wrote:
>
> This also results in a 30fps output with all frames present but seems
> counter intuitive to put the frame rate on an image input. I wasn't able to
> find documentation on this behavior. Is someone able to explain how this is
> working internally? And whether or not this "fix" is actually reliable or
> just a lucky coincidence?

Default frame rate for the image demuxer is 25 unless you add the -framerate
input option.

https://ffmpeg.org/ffmpeg-formats.html#image2-1
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Re: [FFmpeg-user] Have trouble saving opengl-generated RGB image sequence to .mp4

[Lou Logan]

On Tue, Feb 25, 2020, at 10:41 AM, Marton Balint wrote:
>
> Does it make sense to separate the two?

I don't think so, but I'm not strongly opinionated about it.

Library usage and cli tool usage are two completely different topics.
I don't know how others here feel, but I have no interest in reading
library questions.

> libav-user traffic is quite low,

libav-user averages ~50 messages per month in the last year. Seems like
enough to me. If it were down to single digits then message count would
be more of a factor.

Do you think library questions would get more attention if all user help
was in one mailing list?

> also there is the libav v.s. ffmpeg confusion

I don't know how relevant that is anymore. Libav is inactive. I haven't
seen any user questions involving it for quite a while (here or
anywhere else).
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Re: [FFmpeg-user] Have trouble saving opengl-generated RGB image sequence to .mp4

[Lou Logan]

On Tue, Feb 25, 2020, at 7:49 AM, Igor Belyakov wrote:
>
> My code is mostly composed of "encode_video.c" example: 
> https://ffmpeg.org/doxygen/trunk/encode_video_8c-example.html

This mailing list (ffmpeg-user) is only for questions involving the
FFmpeg command-line tools (ffmpeg, ffplay, ffprobe). Questions about
using the FFmpeg libraries (libavcodec, libavformat, etc) should be
asked at libav-user. See:

https://ffmpeg.org/contact.html
https://ffmpeg.org/mailing-list-faq.html#What-type-of-questions-can-I-ask_003f
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Re: [FFmpeg-user] No response from trac.ffmpeg.org

[Lou Logan]

On Sun, Feb 23, 2020, at 8:28 PM, Mark Filipak wrote:
> 
> Just now, after clicking it dozens of times and after several hours, I 
> clicked the "Resend Email" button and promptly received the confirmation 
> email. I guess I'm now registered.
> 
> Thanks, person-who-fixed-it, whoever you are.

I didn't do anything, but I just now I looked at the logs and saw that the
missing messages were blocked by gmail.

Not sure why it eventually worked.
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Re: [FFmpeg-user] No response from trac.ffmpeg.org

[Lou Logan]

On Sun, Feb 23, 2020, at 1:00 PM, Mark Filipak wrote:
> Sorry for the interruption but I have no choice.
> 
> Can anyone contact the folks at trac.ffmpeg.org?
> 
> I'm trying to register, but I get no confirmation email -- I've tried 4 
> times. There's no way I can contact them for help because,
> 1, there's no 'contact' link,
> 2, "Help/Guide" is entirely passive & static, and
> 3, there may be other ways but, in their words: "permissions have been 
> limited until you verify your email address."

Often this is due to a blocklist being used by the recipient's email service
although I don't recall gmail ever having this issue. Is the email address
you used to register the same as the one you used to message this mailing
list?

The mail log on the trac server will usually indicate if a blocklist is the 
problem.
If it is then the server can usually be removed from the blocklist within a day.
I'm not able to do that now but can in ~18 hrs unless someone else does it.

Or try a different email address with a different email service.
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Re: [FFmpeg-user] Low quality when using GPU (h264_videotoolbox) to create mp4s

[Lou Logan]

On Fri, Feb 21, 2020, at 10:57 AM, MediaMouth wrote:
>
> The stdout seems to suggest the issue is -crf vs a constant bitrate..
> Codec AVOption crf (Select the quality for constant quality mode) 
> specified for output file #0 ([DestPath]) has not been used for any 
> stream. The most likely reason is either wrong type (e.g. a video 
> option with no video streams) or that it is a private option of some 
> encoder which was not actually used for any stream.
> but I've definitely used -crf in the past with h264_videotoolbox 
> without an issue.

-crf is not a generic option. It is a "private" option that is only supported by
certain encoders including libx264, libx265, libaom-av1, libvpx, and libxavs.
I see no mention of this option in libavcodec/videotoolboxenc.c.

Generic vs private option description:
https://ffmpeg.org/ffmpeg.html#AVOptions

You can see the private options offered by h264_videotoolbox with:
ffmpeg -h encoder=h264_videotoolbox

I have no experience with videotoolbox, and I don't have the necessary
hardware to try it, so I can't provide any suggestions other than to
investigate the available private options and perhaps try manually
providing an appropriate bitrate, such as -b:v 2000k.
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Re: [FFmpeg-user] US Consultants

[Lou Logan]

On Thu, Feb 6, 2020, at 12:12 PM, tma...@trueprobity.com wrote:
> Are there any US based FFMPEG consultants available?

Baptiste is in LA according to:
https://ffmpeg.org/consulting.html

If you provide more details perhaps an unlisted US based
consultant/developer would be interested.
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Re: [FFmpeg-user] avformat_open_input with custom AVIOContext (duration incorrect)

[Lou Logan]

On Thu, Feb 6, 2020, at 12:11 PM, tma...@trueprobity.com wrote:
> I am trying to use a custom AVIOContext...

This question belongs on the libav-user mailing list.
ffmpeg-user is for questions about using the command-line tools.
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Re: [FFmpeg-user] Archlinux update breaks kmsgrab: Failed to get plane resources: Permission denied

[Lou Logan]

> Hi there,
> 
> For sometime I've been happily using kmsgrab to make screencasts on
> my Archlinux Xorg desktop.
> 
> https://github.com/kaihendry/recordmydesktop2.0/blob/9825a44d886318d78463c0a602681c0c7931cf83/x11capture#L71
> 
> But then it broke after a reboot as described here:
> https://www.reddit.com/r/ffmpeg/comments/ez4u5z/failed_to_get_plane_resources_permission_denied/
> 
> Downgrading ffmpeg or linux didn't appear to solve the problem.
> Perhaps it was some Intel driver update? I'm not sure what package to
> try downgrade or to bisect this breaking dist-upgrade and reboot,
> since there has been so many updates...

Before doing anything else refer to /var/log/pacman.log and try to
narrow down the culprit. Right now I'm not sure if ffmpeg has anything
to do with it (but I know nothing of kmsgrab).

> Full log is here:
> https://s.natalian.org/2020-02-06/1580968072.mp4.log

Unfortunately you used the accursed -hide_banner option which often
damns the user into getting no response because it hides important
info and makes the log not usable.

I prefer the default loglevel and that the log is provided directly in
the email in case the link goes away.
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Re: [FFmpeg-user] Growing file processing

[Lou Logan]

On Sun, Mar 10, 2019, at 3:05 AM, Bouke wrote:
>
> I reverted to webmail, and missed some stuff here and there. (One of my 
> accounts bounces a lot of mails from the FF list for some reason.)

If I recall correctly it is related to the DMARC policy of your mail provider. 
I made a change last week that may help with that.
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Re: [FFmpeg-user] Error while building recent FFmpeg from source

[Lou Logan]

On Thu, Mar 7, 2019, at 4:16 AM, Venkateswaran.S wrote:
> Hi Team,
> 
> I'm building FFmpeg from below github source.
> https://github.com/FFmpeg/FFmpeg.git
> 
> Configure script :
> ./configure --enable-gpl --enable-version3 --disable-static --enable-shared
> --enable-small --enable-avisynth --enable-chromaprint --enable-frei0r
> --enable-gmp --enable-gnutls --enable-ladspa --enable-libaom
> --enable-libass --enable-libcaca --enable-libcdio --enable-libcodec2
> --enable-libfontconfig --enable-libfreetype --enable-libfribidi
> --enable-libgme --enable-libgsm --enable-libjack --enable-libmodplug
> --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb
> --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopenmpt
> --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband
> --enable-librtmp --enable-libshine --enable-libsmbclient --enable-libsnappy
> --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtesseract
> --enable-libtheora --enable-libtwolame --enable-libv4l2
> --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx
> --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265
> --enable-libxvid --enable-libxml2 --enable-libzmq --enable-libzvbi
> --enable-lv2 --enable-libmysofa --enable-openal --enable-opencl
> --enable-opengl --enable-libdrm

Why are you enabling so much stuff? Are you really going to use gsm, modplug, 
amr, etc? Seems like a waste of time and effort. Just enable what you need.
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Re: [FFmpeg-user] FFmpeg Discord Channel

[Lou Logan]

On Wed, Mar 6, 2019, at 2:06 PM, Glenn W wrote:
> For those that are interested, please join us on the FFmpeg Discord Channel
> for more live discussion and help answering questions @
> https://discord.gg/Atvd54N
> 
> We also welcome people to post projects and helpful repos that they have
> worked with on #featured.
> 
> Best,
> Glenn W

You already mentioned this 12 days ago:


I would not like to see this message become a re-occurring announcement.

As mentioned in the previous thread we try to promote open software, so Discord 
will not be endorsed or supported by the project as long as it remains 
proprietary.
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Re: [FFmpeg-user] issue with compressing images to video

[Lou Logan]

On Wed, Mar 6, 2019, at 1:37 PM, Henry Mosher wrote:
> Hi, I am getting an error when I try to compress a set of images into a
> video, in order based on the number of the filename, after writing the
> images from Natron. (I am using Mac OSX)
> 
> I'm using the command :
> ffmpeg -framerate 24 -i img-%02d.jpg output.avi
> 
> The files are named "img-01, img-02, etc...) with ## padding.
> 
> The error is : "no such file or directory exists"
> I have tried setting "start_number 01" to no avail. I also tried writing
> out the path. If it helps, the folder is located on the desktop. I also
> tried simpy converting a video, but got the same input error. It seems like
> ffmpeg does not know where to look for input files.
> 
> I've found other people with this problem online but found no workable
> solutions. If you have any ideas I'd be happy to hear them --

Works for me. Ensure you are in the proper directory.

Show the complete console output from your command.

List the directory contents containing the images, or at least list some of 
them:
ls | head -n10
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Re: [FFmpeg-user] Question about merging audio and soundless video files

[Lou Logan]

On Tue, Mar 5, 2019, at 6:59 AM, JD wrote:
> The audio file is recorded at bitrate 320k.
> But after combining the audio and the video,
> and running ffprobe, it shows that the audio
> bitrate is 128k.
> So, why would ffmpeg downgrade the audio bitrate?

Sounds like you re-encoded the audio using a default bitrate value instead of 
just re-muxing or re-encoding with your desired bitrate, but that is only a 
guess.

You should always include your actual commands and the complete console output 
from each command. You'll get answers instead of guesses. You'll get answers 
faster. People will be more inclined to reply.
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Re: [FFmpeg-user] Invalid riff index > 256 errors

[Lou Logan]

On Fri, Mar 1, 2019, at 6:08 AM, Morgan Carr Markell wrote:
> I'll have to ask the administrators for permission to install a more
> recent version of ffmpeg.

If they say no, and if you can download and execute files, just get it from:
https://johnvansickle.com/ffmpeg/
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Re: [FFmpeg-user] Multithreaded Asynchronous Encoding/Muxing

[Lou Logan]

On Tue, Feb 26, 2019, at 1:33 PM, BIGLER Don (Framatome) wrote:
> All,
> 
> I am writing an application that displays, encodes, and muxes live 
> video using ffmpeg as the backend.  The audio and video encoding occurs 
> asynchronously in the background, each in its own thread, such that the 
> encoded packets arrive to the av_interleaved_write_frame() function 
> call at different times.
[...]

This mailing list (ffmpeg-user) is only for questions involving the FFmpeg 
command-line tools (ffmpeg, ffplay, ffprobe). Usage questions involving the 
FFmpeg libraries (libavcodec, libavformat, etc) should be asked at libav-user.
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Re: [FFmpeg-user] Errors on P frame after transcoding.

[Lou Logan]

On Thu, Feb 21, 2019, at 5:58 AM, NDJORE BORIS wrote:
> Hello all,
> 
> When I try to decode a transcoded video I have the following errors:
> 
[...]
> 
> Can someone explain me  what it means and if possible how can I fixe it,
> please?
> For information I use doc/examples/transcoding.c
> 
> example
> to transcode the video.

You should be sending this to the libav-user mailing list, not here. 
ffmpeg-user is only for questions involving the FFmpeg command-line tools 
(ffmpeg, ffplay, ffprobe).

Also, please remove libav-user-requ...@ffmpeg.org as a recipient: that's the 
address for the libav-user mailing list "bot", not the mailing list itself.

For more info see:
https://ffmpeg.org/contact.html
https://ffmpeg.org/mailing-list-faq.html
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Re: [FFmpeg-user] Getting resulting width and height from scale filter

[Lou Logan]

On Thu, Feb 21, 2019, at 2:52 AM, Michael Bachmann wrote:
> Is there a way to get the resulting width and height from a scale 
> filter, so i can setup the Encoding-AVCodecContext correctly (with 
> width and height)?

This mailing list (ffmpeg-user) is only for questions involving the FFmpeg 
command-line tools (ffmpeg, ffplay, ffprobe). Usage questions involving the 
FFmpeg libraries (libavcodec, libavformat, etc) should be asked at libav-user.
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Re: [FFmpeg-user] How to UN-sub (and re-sub) the the mailing list?

[Lou Logan]

On Wed, Feb 20, 2019, at 10:21 AM, Lou Logan wrote:
>
> You can disable/enable mail delivery anytime while still remaining subscribed.
> 
> 1. Go to the mailing list page:
> https://ffmpeg.org/mailman/listinfo/ffmpeg-user
> 
> 2. Enter your email address in the box at very bottom of the page and 
> click the "Unsubscribe or edit options" box.
> 
> 3. Enter your password and click the "Log in" button.
> 
> 4. Look for the "Mail delivery" option. If you check "set globally" it 
> will apply your choice to any other FFmpeg mailing lists you are 
> subscribed to.

Alternatively, from your subscribed address, send a message to 
ffmpeg-user-requ...@ffmpeg.org with the subject "set delivery off". To 
re-enable mail delivery send a message to ffmpeg-user-requ...@ffmpeg.org with 
the subject "set delivery on". 
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Re: [FFmpeg-user] How to UN-sub (and re-sub) the the mailing list?

[Lou Logan]

On Tue, Feb 19, 2019, at 11:14 PM, Andrew Valenkov wrote:
> I am but a novice, not aiming to be an FFMPEG expert. I have some 
> questions, and pretty much no answers. It is not in my best interest to 
> be subscribed to the mailing list all the time, since I get about a 
> dozen (or 3 dozens) messages in my inbox DAILY. So, how does one 
> unsubscribe (AND RE-SUBSCRIBE) from/to the mailing list?

You can disable/enable mail delivery anytime while still remaining subscribed.

1. Go to the mailing list page:
https://ffmpeg.org/mailman/listinfo/ffmpeg-user

2. Enter your email address in the box at very bottom of the page and click the 
"Unsubscribe or edit options" box.

3. Enter your password and click the "Log in" button.

4. Look for the "Mail delivery" option. If you check "set globally" it will 
apply your choice to any other FFmpeg mailing lists you are subscribed to.

Also, as Ted mentioned, organizing the mailing list messages via filtering is 
definitely recommended:

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Re: [FFmpeg-user] create video from image

[Lou Logan]

On Wed, Feb 13, 2019, at 12:23 PM, juan carlos wrote:
> I already indicated in another email that since the release of ffmpeg 
> 4.0 the project does not take seriously the work of updating the 
> documentation

I disagree with that statement. We are only volunteers and use our spare time 
to try to keep the large set of documentation accurate for a project with high 
development activity on an often complex subject matter. Nobody gets paid to do 
this and anyone is welcome and encouraged to send patches to help.

> no command posted in the different pages referring to the 
> project works correctly,

Which commands, exactly? Where in the documentation? It would be much easier to 
fix if you tell us exactly what doesn't work and where you found it.

>  in the previous one I tried to use a format 
> that according to you It was not supported anymore, but it is not 
> mentioned anywhere so I can not know if that is true

The removal of ffserver stuff was incomplete. I will work on that.

> this time I have  errors trying to create a video from an image
> 
> ffmpeg -f image2 -i image.jpg -vcodec libx264 -b:v 200k -t 30 out.mp4
> Error initializing output stream 0:0 -- Error while opening encoder for 
> output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, 
> width or heigh

I don't see your command, or a similar one, in the documentation. Where did you 
find it? Since you're commenting on the state of the documentation I assume you 
are indicating that your broken command is from the documentation.

As for your command, I'll assume the main problem is that you are not telling 
ffmpeg to loop the image. Also, your player may not like the resulting pixel 
format, so make it yuv420p. If you are presenting the output via progressive 
download add "-movflags +faststart" so your viewers don't have to wait as long 
for it to begin playback.

ffmpeg -loop 1 -i image.jpg -c:v libx264 -vf format=yuv420p -movflags 
+faststart -t 30 out.mp4

This is my attempt for an all-inclusive command for you since you did not 
provide any details or requirements. You may experience other errors or issues 
(such as "width/height not divisible by 2"), but since you did not include the 
complete console output I can't give you a turnkey, personally customized, 
cut-and-paste command for rote usage.
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Re: [FFmpeg-user] What is option -level ?

[Lou Logan]

On Tue, Feb 12, 2019, at 1:11 PM, Ulf Zibis wrote:
>
> I'm not sure, if I need 2 passes

It depends on what you want to do. If you want to try to target a specific 
output file size then use two-passes. If that's not really a concern just do a 
single pass using -crf. See the wiki page:

https://trac.ffmpeg.org/wiki/Encode/H.264

> but I think, -movflags faststart could be useful.

Sure, if you are going to present the video via progressive download. Doesn't 
hurt if you include it either way. It just may add a few more seconds to the 
whole process.

> If I need 2 passes I should know about the correct syntax, "-flags pass1" or
> "-pass 1".

"-pass 1" for the first pass, then "-pass 2" for the second pass.

> I honestly don't know if I need -level

Ignore it.
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Re: [FFmpeg-user] What is option -level ?

[Lou Logan]

On Tue, Feb 12, 2019, at 11:33 AM, Ulf Zibis wrote:
> In another option set of K9copy there is:
> -b $VIDBRk -s $WIDTHx$HEIGHT -vf
> crop=$WIDTH-$CROPRIGHT-$CROPLEFT:$HEIGHT-$CROPTOP-$CROPBOTTOM:$CROPLEFT:$CROPTOP
> -aspect $ASPECT -codec:v libx264 -level 30 -flags +loop+mv4 -cmp 256
> -partitions +parti4x4+parti8x8+partp4x4+partp8x8+partb8x8 -me_method hex
> -subq 7 -trellis 1 -refs 5 -bf 3 -b-pyramid normal -weightb 1
> -mixed-refs 1 -8x8dct 1 -coder 1 -me_range 16 -g 250 -keyint_min 25
> -sc_threshold 40 -i_qfactor 0.71 -qmin 10 -qmax 51 -qdiff 4 -pass $PASS
> -passlogfile $PASSLOGFILE
> 
> Shouldn't it be "-flags pass1" instead "-pass 1"?
> Are there other elements in that option set, which are bad syntax? E.g.
> for -cmp I only see values like 'sad' in the ffmpeg docs, but not '256'.

This looks like a command from 10 years ago.

Use -crf instead of -b. If you must use -b then use -b:v.

Use scale filter instead of -s. If you need to scale.

Do you need to crop?

You don't need -aspect. If you do want to mess with aspect use setsar filter.

You probably don't need -level. Are you encoding for a device that requires 
level 3? Does your output work with level 3? The console output will let you 
know if it exceeds the level limits.

Get rid of everything starting from -flags to -qdiff. That's what -preset is 
for. The presets were made so users don't have to use a million options.

Do you really need to do two passes? Are you targeting a specific output file 
size? If no, then don't use -pass or -passlogfile, use -crf, and do it all in 
one pass.

So your command could be simplified to something like:
ffmpeg -i input -c:v libx264 -crf 22 -preset slow -c:a aac output.mp4
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Re: [FFmpeg-user] Transcoding from mp4 to avi is too slow

[Lou Logan]

On Tue, Feb 12, 2019, at 5:17 AM, NDJORE BORIS wrote:
> Hello Team,
> I have trouble and I know you can help me.
> 
> I use transcoding.c example to transcode from mp4 to avi.

This mailing list (ffmpeg-user) is only for questions involving the FFmpeg 
command-line tools (ffmpeg, ffplay, ffprobe). Usage questions involving the 
FFmpeg libraries (libavcodec, libavformat, etc) should be asked at libav-user.
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Re: [FFmpeg-user] ffmpeg HIGH CPU, http streaming with libmp3lame

[Lou Logan]

On Tue, Feb 5, 2019, at 8:15 AM, Zoltan Kerenyi Nagy wrote:
> Hi,
> 
> The CPU usage is still abobe 90% with libshine. Do you think that something
> is buggy with my script?
> https://pastebin.com/dyHK6ATh
> 
> Zoli

1. I've never used ffserver so I can't comment on that.

2. We don't provide support for scripts here: it complicates matters. Please 
just provide your actual, unscripted ff* commands and the complete console 
outputs in a reply (not a link).
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Re: [FFmpeg-user] ffmpeg HIGH CPU, http streaming with libmp3lame

[Lou Logan]

On Mon, Feb 4, 2019, at 11:31 AM, Zoltan Kerenyi Nagy wrote:
> Hi All,
> 
> For some reason the CPU is insanely high, hitting almost all the time 100%,
> I run ffmpeg on an ARM7 4 core embedded device.
> 
> This is the setup, how I do it:
> 
> ffserver -d -f /etc/ffserver.conf
> ffmpeg -f alsa -i hw:0,0 http://localhost:/audio.ffm

You can see if libshine gives you better performance likely at the cost of 
quality per bit but it may not matter. You'll need to compile with 
"--enable-libshine" and encode with "-c:a libshine" unless it is the only MP3 
encoder.

> ffmpeg -f alsa -i hw:0,0-ar 8000 http://localhost:/audio.ffm

Use the "-sample_rate" ALSA private option (before the input) if you want to 
change the sample rate, otherwise ffmpeg will use the default ALSA value of 
48000 and resample to 8000.

https://ffmpeg.org/ffmpeg-devices.html#alsa
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Re: [FFmpeg-user] Meaning of ffprobe output

[Lou Logan]

On Mon, Jan 28, 2019, at 6:58 PM, Carl Eugen Hoyos wrote:
>
> (So apparently the next sentence is wrong and Lou
> does offer release support - but unfortunately only
> to you because he closed ticket #7697 this week
> explaining there is no release support...)

I don't quite follow your paragraph, but I never said "I offer release support".
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Re: [FFmpeg-user] Need to Make ProRes HQ video file with 5.1 audio using ffmpeg

[Lou Logan]

On Mon, Jan 21, 2019, at 5:11 PM, Mark Scott wrote:
> Thank you. I copied and pasted the command line that you suggested, but got
> the error message. Input: No such file or directory. Then as a test I ran
> my original command and it worked, just with the wrong audio. Here's a
> screenshot with the information. I'll look at the links that you provided.
> 
> [image: Screen Shot 2019-01-21 at 8.05.30 PM.png]

Replace "input" with your actual input file name. I guess in this case it is 
"master.mov".

Next time please copy and paste the console text instead of making images of 
the text.
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Re: [FFmpeg-user] Need to Make ProRes HQ video file with 5.1 audio using ffmpeg

[Lou Logan]

On Mon, Jan 21, 2019, at 3:12 PM, Mark Scott wrote:
> Hello,
> I'm having trouble understanding audio mapping. I have a master .mov
> file with 6 Mono tracks plus a stereo track. Per my customer
> requirements, the output file needs to be ProRes HQ .mov  with the
> audio configuration to be: 1-Left, 2-Right, 3-Center, 4-LFE, 5-Left
> Surround, 6-Right Surround, plus Ch.7&8 Stereo. 

You can use the amerge filter to choose which stream goes where in the layout, 
then use -map to choose the video, the output from amerge, and the stereo 
stream:

  ffmpeg -i input -filter_complex 
"[0:a:0][0:a:1][0:a:2][0:a:3][0:a:4][0:a:5]amerge=inputs=6[a]" -map 0:v -map 
"[a]" -map 0:a:6 -c:v prores -profile:v 3 -c:a pcm_s24le ProResHQ.mov

See "ffmpeg -layouts" for a list of standard channel layouts.

If your video is already ProRes HQ then change "-c:v prores" to "-c:v copy".

https://ffmpeg.org/ffmpeg-filters.html#amerge
https://trac.ffmpeg.org/wiki/AudioChannelManipulation#a6mono5.1
https://ffmpeg.org/ffmpeg.html#Advanced-options
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Re: [FFmpeg-user] Can I Batch Encode with ffmpeg on Mac?

[Lou Logan]

On Fri, Jan 18, 2019, at 2:10 PM, Mark Scott wrote:
> Hello,
> First off, I need to say that I'm very new to ffmpeg. I do not have
> much experience with writing command lines or scripts so please excuse
> me if I don't understand the terminology. I have figured out how to
> encode uncompressed .mov files to cut off the first few seconds of the
> video, and convert it to ProRes codec. Is there a way to automate the
> process to batch encode several files at once? I'm using an iMac with
> OS X El Capitan. Here is the command line that I use in terminal.
> 
> ffmpeg -ss 6 -i "title".mov -vcodec prores -acodec pcm_s24le 
> "title_Prores".mov

That's more of a shell scripting question, but anyway:

mkdir outputs
for f in *.mov; do ffmpeg -ss 6 -i "$f" -c:v prores -c:a pcm_s24le 
"outputs/${f%.*}_Prores.mov"; done
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Re: [FFmpeg-user] Proper way to write data into an AVFrame

[Lou Logan]

On Thu, Jan 3, 2019, at 9:06 PM, Ronak wrote:
> Hi,
> 
> I'm trying to use FFmpeg in my iOS App; and would like to write data 
> into an AVFrame that I can later filter using one of the filters in the 
> libavfilter library (silenceremove, loudnorm or dynaudnorm for example).
> 
> I noticed there's a method to correctly write data into a frame in 
> libavcodec: 
> https://ffmpeg.org/doxygen/4.1/libavcodec_2utils_8c_source.html#l00372.
> 
> Is there any such method in libavfilter or libavutil to do the same? I 
> would like to use an already provided C API; instead of trying to do 
> this manually in Swift...since the bridging between Swift and C isn't 
> the best for FFmpeg.
> 
> Thanks,
> 
> Ronak

ffmpeg-user is for questions involving the FFmpeg command-line tools (ffmpeg, 
ffplay, ffprobe). Questions involving the FFmpeg libraries should be asked at 
libav-user.
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Re: [FFmpeg-user] remux AVI (H.264+MP3) to MP3 causes problems in browser; Missing PTS timestamps

[Lou Logan]

On Thu, Jan 3, 2019, at 11:14 AM, Ben wrote:
>
> Now I remux (without new encoding) them with the following ffmpeg 
> command to MP4 container :
> 
> Fmpeg.exe  -i test.avi -acodec copy -vcodec copy -map 0 test_out.mp4

We need to see the complete console output from your command to be able to make 
any suggestions.
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Re: [FFmpeg-user] How to extract 1 frame as JPEG per minute

[Lou Logan]

On Wed, Dec 19, 2018, at 12:17 PM, Ulf Zibis wrote:
>
> ffmpeg -i CYD.mp4 -vf select='not(mod(n\,1500))' CYD_%03d.jpg
> I got 150,000 pictures with reduced quality (~12 kB). Weird!!!

Add "-vsync vfr -q:v 2" output options.
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Re: [FFmpeg-user] How to filter VHS cassette artifacts

[Lou Logan]

On Fri, Dec 7, 2018, at 10:33 AM, Ulf Zibis wrote:
> Hi,
> 
> I have a VOB-file, originally recorded from a VHS-Kassette.
> 
> On the upper edge I see a black line from left to the middle.
> 
> Approximately 5 lines from bottom I see 2..3 other horizontally shifted
> flickering lines.

The band of garbage on the bottom looks like head switching noise.

https://bavc.github.io/avaa/artifacts/head_switching_noise.html
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Re: [FFmpeg-user] HD MXF SMPTE ST377 Standard Compliance Problem with multiple IndexTableSegments carring Unique ID twins (maybe a bug)

[Lou Logan]

On Fri, Nov 9, 2018, at 8:01 AM, Carl Eugen Hoyos wrote:
>
> (Continuing a discussion I had with several people who archive.)
> I wonder if this is all intentional (seriously!), you have a
> specification that from all I know is unclear, multiple different
> and incompatible implementations and several commercial
> applications that tell you what's wrong in the files - but
> nobody seems to be very interested in fixing these "issues".

This reminds me of a few conversations I've had with those seeking alternatives 
in the seemingly locked-in world of the legacy cable broadcast stream 
conformation cycle. Luckily I'm not involved in broadcast but the situation (a 
few years ago at least) seemed to be:

"Buy our $4000 (USD) analyzer to see what we say is 'wrong' with your input. 
Buy our $6000 muxer to make it pass our analyzer."
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Re: [FFmpeg-user] TXXX:CATALOGNUMBER

[Lou Logan]

On Tue, Oct 2, 2018, at 8:20 PM, yUGz afterLife wrote:
> < ?php
[...]
> ?>

We can't help with scripting on this mailing list: only unscripted usage of the 
FFmpeg cli tools is supported here.

> And yes the -t 1 setting is a troll

Incorrect. Moritz's example using a synthetic audio source as an input, which 
by default has an indefinite duration, so unless you want to encode forever the 
output duration must be set either with -t or the d/duration option within that 
filter. In this case the actual duration Moritz chose does not matter as the 
important information that he was trying to relay is that it worked for him.
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Re: [FFmpeg-user] I need to be able to convert audio files to video & run through an admin system on a website

[Lou Logan]

On Wed, Oct 3, 2018, at 9:56 AM, Al Vincent wrote:
> Can you help, please? I need to find a way to auto convert an mp3 or wav
> file to short video through the backend when someone hits a button on the
> front end. And then it be linked to a share on social media. is
> this possible? Can ffmpeg help do this?

This is a very broad request. On this mailing list we can help you with the 
audio to video part using ffmpeg (unscripted), but not the rest. Some basic 
examples:

Combine image and audio:
ffmpeg -loop 1 -i image.png -i audio.mp3 -vf format=yuv420p +movflags faststart 
-shortest output.mp4

Make video from a filter such as showwaves:
ffmpeg -i input.wav -filter_complex 
"[0:a]showwaves=s=1280x720:mode=line:rate=25,format=yuv420p[v]" -map "[v]" -map 
0:a +movflags faststart output.mp4

https://ffmpeg.org/ffmpeg-filters.html
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Re: [FFmpeg-user] Wanna to apply effect and play video at same time

[Lou Logan]

On Thu, Sep 13, 2018, at 6:38 AM, shreyas vaghela wrote:
> It is possible to give full command with example to i better to understand
> ,Bcz i new in ffmpeg.it would be great help from your side.

Carl and I both gave full example commands.
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Re: [FFmpeg-user] Wanna to apply effect and play video at same time

[Lou Logan]

On Tue, Sep 11, 2018, at 9:33 AM, shreyas vaghela wrote:
> Wanna to apply effect and play video at same time, it is possible to do
> same thing at one using Ffmpeg command line.

You can use ffplay to apply effects and play at the same time:

ffplay -vf negate,vflip input.foo
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[FFmpeg-user] [ANNOUNCE] ffmpeg-user will now only accept messages from subscribed senders

[Lou Logan]

This mailing list will now only accept messages from subscribed users. 
Previously anyone could email the list to post a message, but that caused 
several issues:

* Non-subscribed users do not directly receive emails of any messages on the 
mailing list. This includes replies to their messages, so a significant number 
of non-subscribed users were not aware of replies resulting in wasted time and 
effort from those taking the time to answer. Subscribed users receive all 
messages posted to the mailing list.

* Messages from non-subscribed users had to wait in a moderation queue to be 
manually approved. This required someone to volunteer for the unenviable job to 
parse the queue (the vast majority being spam) once or twice a day. Sometimes, 
such as during travel or vacations, the message could be in the queue for 
weeks. Messages from subscribed users get posted immediately and automatically.

* Non-subscribed users would often send-subscribe-resend, without deleting the 
original queued message, causing duplicate messages to appear in the queue 
and/or mailing list.

* The mailing list would send a reply to each sender of a held message 
informing them that their message is in the moderation queue. This included 
replies to spam which increased email noise.

The ffmpeg-devel mailing list will still accept messages/patches from 
non-subscribed users.

To subscribe to this mailing list email ffmpeg-user-requ...@ffmpeg.org with the 
subject "subscribe". Or visit the ffmpeg-user mailing list info page[1] and 
refer to the "Subscribing to ffmpeg-user" section.

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[1] https://lists.ffmpeg.org/mailman/listinfo/ffmpeg-user/
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Re: [FFmpeg-user] Converting .trm files ("ForTheRecord") -- force AAC decoding?

[Lou Logan]

On Tue, Jun 26, 2018, at 10:07 AM, John A Hawkinson wrote:
>
> How can I tell ffmpeg to attempt to use its AAC decoder? I feel like I'm 
> missing something obvious, but maybe I've successfully told it to do so 
> and the AAC decoder is not happy (maybe it's encrypted?).

Please provide a sample input file if possible.
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Re: [FFmpeg-user] Getting started: how to enable filters

[Lou Logan]

On Thu, Jun 21, 2018, at 5:21 PM, Todd Van Horne wrote:
>
> I see, thank you. Can you tell me where I can find instructions for
> installing the filters?
> -Todd

Lazy method is to download a ffmpeg with libvidstab already included:

Linux: https://johnvansickle.com/ffmpeg/
Windows& macOS: https://ffmpeg.zeranoe.com/builds/
macOS: https://evermeet.cx/ffmpeg/
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Re: [FFmpeg-user] Request: Older Android version & automation issue.

[Lou Logan]

On Tue, Jun 19, 2018, at 2:49 PM, Dan French wrote:
> For compatibility reasons, I need to get the older version of ffmpeg for 
> Android.
> 
> 
> Can someone provide me with a location/binary of V 0.97.5 (so I can go 
> through the fun of installing it)?

I do not believe there ever was such a version.
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Re: [FFmpeg-user] Report Error during Configuration

[Lou Logan]

On Sat, Jun 16, 2018, at 11:29 PM, けつせいご wrote:
>
> Attached is the log. Your help would be greatly appreciated.

I don't see the log attached here, but I know you attached one because I saw it 
in the moderation queue, so it must have been stripped by the mailing list for 
some reason. I didn't pay attention to the file type of the attachment, but 
please provide a plain text log.
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Re: [FFmpeg-user] parallel filter works in mp4 but not mkv or other audio formats.

[Lou Logan]

On Wed, Jun 13, 2018, at 11:56 PM, siamaketezadi wrote:
>
> I get the following errors:
[...]

Please show the *complete* console output.
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Re: [FFmpeg-user] Size of the video output file changes after mirror effect.

[Lou Logan]

On Mon, Jun 11, 2018, at 10:17 AM, Mehta Naisargi Rajeshbhai wrote:
>
> Here size of video output file decreases after giving mirror effect. And 
> rest of the things remains same for example resolution remains the same. 
> So can anyone tell me that why the size of video output file is 
> changing?

Filtering requires encoding. The input is decoded, filtering is applied, then 
it is sent to the encoder to create the output. Since the output is not the 
exact same data as the input, and due to the differences between formats and 
encoder implementations, the resulting file size will be different.

> And  what steps I need to follow for mirror effect to keep the size of 
> the output file  same as that of the input file.

Why do you want to keep the file size the same?

Mirror it using your player instead. For example:

ffplay -vf hflip input.mp4
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Re: [FFmpeg-user] error: 'x265_api_get' undeclared (first use in this function)

[Lou Logan]

On Sun, Jun 10, 2018, at 5:53 PM, lx wrote:
> hg clone https://bitbucket.org/multicoreware/x265
> cd x265
> hg checkout 0.8

According to the FFmpeg configure file:

X265_BUILD >= 68

The x265 0.8 tag is probably too old, so reset to the "default" branch and 
avoid checking out old, unsupported tags.
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Re: [FFmpeg-user] Way to encode and crop dynamically by keyboard

[Lou Logan]

On Tue, Jun 5, 2018, at 1:06 PM, David Barbassat wrote:
> Dear All, 
> 
> I am looking for a way to encode by ffmpeg a video but with a dynamic
> crop provided by shell variables 
> 
> For example is it possible to use ${x} and ${y} in the command line and
> change them during the encoding process without launch the encoding each
> time ? 
> 
> Like a crop motion :) 

Should be possible with the zmq filter:
https://ffmpeg.org/ffmpeg-filters.html#zmq_002c-azmq

crop supports the following commands usable by (a)zmq and (a)sendcmd:
https://ffmpeg.org/ffmpeg-filters.html#Commands-12
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Re: [FFmpeg-user] 3D SBS with ffmpeg quality question

[Lou Logan]

On Wed, May 23, 2018, at 5:27 PM, Carl Eugen Hoyos wrote:
>
> PS: They even sell on Amazon;-(

Pavtube (aka i-loveshare and multipelife), among the dozens of similar 
re-branded clones, is Chinese software commonly spammed on countless forums, 
reddit, Stack Exchange, mailing lists, etc, by shills recommending it.

It is basically a GUI for ffmpeg and other open source software, but no efforts 
are made to comply with any licenses. They distribute ffmpeg with non-free 
components enabled.
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Re: [FFmpeg-user] compile error - ERROR: srt >= 1.2.0 not found using pkg-config

[Lou Logan]

On Fri, May 18, 2018, at 7:04 AM, Svyatko Huk wrote:
> Hi guys.
> 
> Using the latest main and dev build I am getting the above error when i 
> try to build a static FFMPEG binary with SRT enabled.
> When i -- Disable-Shared during SRT configure stage, i get the .a 
> and .pc files in the lib64 directory at my FFMPEG PKG_CONFIG_PATH, but 
> ffmpeg doesn't see it.

I'm guessing you didn't "--enable-c-deps" in srt to enable "Extra library 
dependencies in srt.pc for C language".

Following the format of the wiki guide the instructions could look like:

  sudo apt-get install libopenssl-dev
  # The other dependencies build-essential, cmake, and pkg-config are already 
installed previously in the guide
  cd ~/ffmpeg_sources
  git clone --depth 1 https://github.com/Haivision/srt.git
  mkdir srt_build
  cd srt_build
  cmake -DCMAKE_INSTALL_PREFIX="$HOME/ffmpeg_build" -DENABLE_SHARED="OFF" 
-DENABLE_C_DEPS="ON" ../srt
  make
  make install

cmake is used in this case instead of configure to avoid the tcl dependency. 
Now add "--enable-libsrt" to the ffmpeg configure as shown in the wiki and it 
should work as expected.
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Re: [FFmpeg-user] configure x265 error

[Lou Logan]

On Thu, May 17, 2018, at 7:04 AM, karl wrote:
> 
> Hi, I'm attempting to install FFmpeg on Ubuntu 16.04 using these 
> instructions:
> https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu

Your configure line is different than what the above link suggests. Nothing 
wrong with modifying it but it should be noted that you did so.

> Config.log file attached.

Unless I am mistaken it appears your config.log may be truncated and is missing 
the important stuff. Please include the last ~25 lines.
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Re: [FFmpeg-user] How do I reliably get get data not listed in show_format?

[Lou Logan]

On Sun, May 13, 2018, at 8:12 AM, Carl Zwanzig wrote:
>
> Um, when someone _reads_ the text, they're parsing it.

The ticket seems obvious to me that it is referring to machine parsing.

> Maybe it's not intended to be _machine_ parsed, but I've had no trouble with 
> breaking down the text with some code.  It sounds like the better argument 
> is why the informational (not error) output intended for a human to see is 
> being sent to stderr. IMHO, the answer in the ticket is specious.

The comments in the ticket are valid, and you should not be machine parsing the 
stderr output to get input information. The output is not guaranteed to be 
accurate (for example it shows a shorthand "29.97 fps" instead of 3/1001).  
Processing it requires additional tools or code, and the resulting processed 
output may be easily broken with a variety of assorted inputs.

Use ffprobe instead: it is a proper tool for the job.
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Re: [FFmpeg-user] How do I reliably get get data not listed in show_format?

[Lou Logan]

On Fri, May 11, 2018, at 7:36 AM, Nino from Read2Me wrote:
> Hi, I'm interested in this bit:
> 
> Duration: 00:13:14.59, start: 0.006500, bitrate: 31 kb/s
> 
> Stream #0:0: Audio: opus, 48000 Hz, mono, fltp
> 
> According to a few trac tickets (for example
> ) this bit is not meant to be parsed,
> so how do you recommend I get duration as human readable, bitrate and
> sampling? I don't see those listed in [FORMAT][/FORMAT].

For duration examples:
https://trac.ffmpeg.org/wiki/FFprobeTips#Duration

For sample rate:
ffprobe -loglevel error -select_streams a -show_entries stream=sample_rate -of 
csv=p=0 input.mkv

You can of course combine entries:

-show_entries format=format_name:stream=codec_type,channels

> BTW I wanted to chime in on a trac discussion but couldn't complete the
> registration, see attached.

Sorry about that. Should be fixed now.
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Re: [FFmpeg-user] Programmatically combining audio and video streams

[Lou Logan]

On Thu, May 10, 2018, at 1:04 PM, Philip Prindeville wrote:
> Hi.
> 
> I have a code base that currently expects audio and video to be in the 
> same AVFormatContext, and this works great for sources (typically 
> network connections) that contain both audio and video multiplexed 
> together, such as in MP4 or AVI container.
[...]

This mailing list (ffmpeg-user) is only for questions involving the FFmpeg 
command-line tools (ffmpeg, ffplay, ffprobe). Usage questions involving the 
FFmpeg libraries (libavcodec, libavformat, etc) should be asked at libav-user.

See:

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Re: [FFmpeg-user] ERROR: x265 not found using pkg-config

[Lou Logan]

On Wed, May 9, 2018, at 11:13 AM, Marcus Monroe wrote:
> Marcus Monroe has shared a OneDrive for Business file with you. To view 
> it, click the link below.
> 
> 
> 
> [https://r1.res.office365.com/owa/prem/images/dc-generic_20.png]
> 
> config.log

These links require an account. Please use a host that doesn't require an 
account or just attach config.log to your email.
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Re: [FFmpeg-user] compilation : libx264 and libx265

[Lou Logan]

On Mon, May 7, 2018, at 12:12 PM, ghe...@mathnmaps.com wrote:
> Hello,
> 
> 
> Trying to recompile ffmpeg on a Linux Mint 18.3 system; currently  
> installed version
> is 2-3 years old and gives a lot of errors about libav1.

I am not sure of what errors you are referring to.

> The Compilation Guide (trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu) states:
> 
> "If your repository provides libx264-dev version ≥ 118,
>then you can install that instead of compiling
> 
>   If your repository provides libx265-dev version ≥ 68.
>then you can install that instead of compiling"
> 
> Running "apt show" on these two libraries shows the following versions  
> in the repo:
> lib264, Version  2:0.148.2643+git5c65704-1
> lib265, Version  1.9-3
> 
> Are these new enough to use in compilation ?

Yes they are recent enough, but these packages are old and you would be missing 
out on the newer changes (especially for libx265).

So although you can use these packages I recommend at least compiling libx265 
instead of using the repo package: the guide provides instructions to do so.

Or if you don't intend on encoding using either of these encoding libraries you 
can skip them and remove --enable-libx264 and/or --enable-libx265 from your 
ffmpeg configure line.
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Re: [FFmpeg-user] FFMpeg configure issue

[Lou Logan]

On Mon, May 7, 2018, at 10:06 AM, Dennis Mungai wrote:
> You need to install nasm.

He has nasm 0.98.40 installed, but I'm guessing it may be too old.
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Re: [FFmpeg-user] Convert to 96000 Hz DCA spdif not supported?

[Lou Logan]

On Sat, May 5, 2018, at 7:57 AM, Nomis101 🐝 wrote:
> I do have a 96000 Hz FLAC file which I would like to convert to DTS and
> preserve the sample rate. But it seems only 41000 and 48000 is supported.
[...]
> Is this a bug or is this really not supported? 41000 and 48000 workes fine.

Both, kind of. I assume the following commit from today fixed the segfault you 
experienced:
https://git.videolan.org/?p=ffmpeg.git;a=commit;h=c1b282dc74d801f943db282e89f7729e90897669

But the encoder does not support 96000:
$ ffmpeg -h encoder=dts
...
Supported sample rates: 8000 16000 32000 11025 22050 44100 12000 24000 48000
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Re: [FFmpeg-user] Unable to build FFmpeg 4.0 on macOS

[Lou Logan]

On Thu, Apr 26, 2018, at 10:16 AM, Nomis101 🐝 wrote:
> I had a similar problem some time ago, but this time it is different. I
> have installed all dependencies using MacPorts, System is macOS 10.13. I
> can build FFmpeg 3.4.2 without any problem. But if I try to build FFmpeg
> 4.0 or the latest version from github, it can not find any dependencies:
> 
> ERROR: libsoxr not found (and similar)
> 
> But pkg-config is correctly recognizing all of them:
[...]

Why do you have so many dependencies? Are you trying to enable everything? If 
yes, why?

Keep things simple and just enable what you need.
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Re: [FFmpeg-user] Convert images to DNXHD 444

[Lou Logan]

On Tue, Apr 10, 2018, at 1:51 PM, Gonzalo Garramuño wrote:

> For DNxHR 444, this line should do it:
> 
> $ ffmpeg -i test.%04d.tif -r 6/1001 -codec:v dnxhd -profile:v 
> dnxhr_444 -b:v 880M  -pix_fmt yuv444p10 -y test_hr444.mov

Use:

ffmpeg -framerate 6/1001 -i test.%04d.tif -codec:v dnxhd -profile:v 
dnxhr_444 -b:v 880M  -pix_fmt yuv444p10 -y test_hr444.mov

...to avoid 25 to 6/1001 conversion. 
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Re: [FFmpeg-user] unable to view this video as one screen

[Lou Logan]

On Sat, Mar 24, 2018, at 4:04 PM, JD wrote:
> https://www.youtube.com/watch?v=eqboujtUk4Y
> 
> My browser shows 3 parallel views instead of one, of the same "picture".

An ugly, yet common design choice to deal with the popular rise of annoying 
vertical videos being played in the traditional horizontal layout.
 
> can ffmpeg do something so I can use ffplay to view it as one "picture" ?

Download the video using youtube-dl or similar.

Then play with ffplay using the crop filter:
ffplay -vf crop=iw/3 input.mp4

You may have to adjust the values. See:
https://ffmpeg.org/ffmpeg-filters.html#crop
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Re: [FFmpeg-user] concat Missing part2.mov

[Lou Logan]

On Sat, Mar 24, 2018, at 3:10 PM, Dan Norton wrote:
> I have two .mov files which were made on Debian 9 by running the
> following:
> 
> $ ffmpeg -y -i "Norton 8mm Reel 04.mov" -ss 00:00:00 -to 00:20:00 -c
> copy -bufsize 2048K part1.mov 
> $ ffmpeg -y -ss 00:21:12 -i "Norton 8mm Reel 04.mov" -c copy -bufsize
> 2048K part2.mov
> 
> Viewed individually part1 and part2 are OK. When I tried to concatenate
> them, the output is missing part2. Here's what I did:
> 
> $ ffmpeg -i "concat:part1.mov|part2.mov" -c copy
> out.mov 

The concat protocol is too simplistic for this format. It can only be used with 
inputs that support file level concatenation.

Use the concat demuxer instead.

https://ffmpeg.org/ffmpeg-formats.html#concat-1
https://trac.ffmpeg.org/wiki/Concatenate#demuxer
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Re: [FFmpeg-user] Can I create an mp4 with dwell?

[Lou Logan]

On Sun, Mar 18, 2018, at 9:38 AM, Lou Logan wrote:
> Last image should display for a half second + 1 frame (I did not verify).

...assuming it's one of the images in ord-hrrr-slp%02d.png and not segregated.
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Re: [FFmpeg-user] Can I create an mp4 with dwell?

[Lou Logan]

On Sat, Mar 17, 2018, at 11:41 AM, Geoff Fox wrote:
> I'm a meteorologist making my own weather maps.  I use ffmpeg to create my
> animations from still images, like this:
> http://45.79.86.175/output/nam/sfc/conus-nam-slp.mp4
> 
> Typically:  ffmpeg -r 10 -f image2 -s 1920x1080 -start_number 02 -i
> /var/www/html/output/hrrr/sfc/ord-hrrr-slp%02d.png -y -vframes 96 -vcodec
> libx264 -crf 25  -pix_fmt yuv420p
> /var/www/html/output/hrrr/sfc/ord-hrrr-slp.mp4
> 
> It would save me a lot of time if I could build a half second dwell for the
> last frame.  Is this possible with ffmpeg?

By "dwell" I guess you mean a pause. One method is to use the concat filter:

ffmpeg -framerate 10 -start_number 02 -i ord-hrrr-slp%02d.png -framerate 10 -t 
0.5 -loop 1 -i last_frame.png -filter_complex 
"[0][1]concat=n=2:v=1:a=0,format=yuv420p[v]" -map "[v]" output.mp4

Last image should display for a half second + 1 frame (I did not verify).

No need for "-f image2 -s 1920x1080".

Use -framerate instead of -r for the image file demuxer.
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Re: [FFmpeg-user] Dropping frames from video to images

[Lou Logan]

On Wed, Mar 14, 2018, at 3:06 AM, Johanna Andersson wrote:
> Hi!
> 
> I am not an expert at all in ffmpeg, but I use it to cut videos into 
> frames for scientific investigation of fluid flows. I want to get every 
> image (Windows shows me the video has 29 fps). However I seem to drop 
> frames.
> My code is as follows:
> 
> ffmpeg -i D_CIMG7477.MOV -r 29 -f image2 D_CIMG7477-%3d.png

Your input is 29.97 (technically 3/1001), but you told it to use 29, so to 
compensate for the lower value it dropped frames.

However, you don't need to deal with the frame rate options at all to output 
the images. Remove "-r 29".

"-f image2" isn't needed either.
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Re: [FFmpeg-user] unsubscribe

[Lou Logan]

On Tue, Mar 13, 2018, at 10:58 AM, Reindl Harald wrote:
> why do you hijack a random thread and even quote the fucking "to 
> unsubscribe" instruction in the list-footer instead follow it?

This never helps and the tone makes the wider community seem angry and mental. 
Anyway, that user will never read this since they were manually unsubscribed 
before you replied.

There will always be users who don't read instructions and will do this due to 
laziness, ignorance, language barrier, who knows... Yes, it is annoying, but 
the mailing list automatically moves most of these requests into the moderation 
queue so you don't have to see the majority of them.

As a reminder, as stated in the footer of each message, if anyone else wants to 
unsubscribe please refer to  
or just email ffmpeg-user-requ...@ffmpeg.org with the subject "unsubscribe".
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Re: [FFmpeg-user] probleme lors de la compilation de ffmpeg

[Lou Logan]

On Wed, Mar 7, 2018, at 1:44 PM, Cley Faye wrote:
>
> The direct cause of this is that you ask configure to enable librtmp with
> --enable-librtmp but the configure script can't find the development files
> for librtmp. If you really want to support this, on a debian system
> installing "librtmp-dev" should be enough if you're not doing anything
> specific like cross-compiling or using custom prefix.

Alternatively, remove "--enable-librtmp". FFmpeg has native rtmp support, so 
enabling librtmp may not be needed (but I'm unsure what additional features or 
whatever librtmp provides over the native implementation).
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Re: [FFmpeg-user] Transcoding sample app for Resizing video

[Lou Logan]

On Thu, Mar 1, 2018, at 4:25 AM, Vittalprasad wrote:
[...]
> My intention is to use design own transcoding model using ffmpeg libraries.

This mailing list (ffmpeg-user) is only for questions involving the FFmpeg 
command-line tools (ffmpeg, ffplay, & ffprobe). Usage questions involving the 
FFmpeg libraries (libavcodec, libavformat, etc) should be asked at libav-user.
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Re: [FFmpeg-user] ffmpeg3.4 regression

[Lou Logan]

On Fri, Feb 16, 2018, at 1:00 AM, Piotr Oniszczuk wrote:
> Hi
> 
> For reporting this regression I want to register to 
> http://trac.ffmpeg.org/register for reporting vdpau hwaccel playback 
> regression in ffmpeg3.4.
> If I need to report here - pls look further in this email.
> 
> Trying to register: 
> Track shows me antispam page with  
>   • Project name (in lower case) 
>   • How many wings does a bird have? (as word)
> 
> Entering any values always results with:
> „No handler matched request to /register_piotr.oniszczuk@gmail.com_two" 
> 
> How I can overcome this issue?

For the first box enter: "ffmpeg"
For the second box enter: "two"

Without quotes of course.

The page was added to stop the hundreds of spambots attempting to register 
daily. It worked, but the questions could be better.
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Re: [FFmpeg-user] could someone rip this m3u8 stream? ffmpeg give me an error

[Lou Logan]

On Wed, Feb 14, 2018, at 10:48 AM, fathom wrote:
> Hi to all.
> 
> I am trying to rip this stream
> 
> http://viacomitalytest-lh.akamaihd.net/i/sbshdlive_1@195657/master.m3u8
> 
> i use this command line
> 
> ffmpeg -i
> "http://viacomitalytest-lh.akamaihd.net/i/sbshdlive_1@195657/master.m3u8";
> -c:v copy -c:a copy -f mp4  "stream.mp4"
> 
> but ffmpeg dont start to rip and give an error.
> 
> Is there someone that can tell me how can i fix this error?

You should always include any error messages instead of only mentioning that 
you get an error. It is required that you include the complete console output 
from your ffmpeg command. This will include the error. You should always 
include the full command (like you already did) and the resulting console 
output when asking for help.
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Re: [FFmpeg-user] 4K 60Hz Directshow Video Capture

[Lou Logan]

On Tue, Feb 13, 2018, at 12:28 PM, Alex P wrote:
> 
> Does anyone know of a lossless encoder that inputs and outputs bgr24? 

$ ffmpeg -h encoder=libx264rgb
[...]
Supported pixel formats: bgr0 bgr24 rgb24
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Re: [FFmpeg-user] video slows down in the middle

[Lou Logan]

On Thu, Feb 8, 2018, at 10:53 AM, Reindl Harald wrote:
> crazy idea - as you can see they don't get responses

They can see replies (and reply to the replies) via the archives.

Some users want the ability to post without subscribing. It is not a perfect 
system, and the instructions could use some more improvements, but it is 
ultimately the user's responsibility to learn how to use it just like any other 
tool.

Mailing lists are not for everyone, but there are many other help resources out 
there, both official and unofficial, as an alternative means of getting help.

This conversation is getting off-topic.
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Re: [FFmpeg-user] video slows down in the middle

[Lou Logan]

On Thu, Feb 8, 2018, at 10:32 AM, Reindl Harald wrote:
> do you tell us that unsubscribed people can post at all instead get a reject?

Anybody can post to the mailing list with or without being subscribed: all they 
have to do is email ffmpeg-user@ffmpeg.org. Non-subscribed users must wait for 
their messages to be manually approved.
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Re: [FFmpeg-user] video slows down in the middle

[Lou Logan]

On Wed, Feb 7, 2018, at 4:16 PM, Henry Lau wrote:
> Hey guys, sorry I am not a full member of the ffmpeg alias group yet. Do I
> have to be a member to receive responses? Just curious because it looks
> like there is some interest in this thread.Thanks!

Users that are not subscribed do not receive any messages, including replies. 
However, you can still reply via the archives:


Users that are subscribed receive *all* messages on the mailing list, including 
replies.
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Re: [FFmpeg-user] Error building ffmpeg with x265 support

[Lou Logan]

On Mon, Feb 5, 2018, at 8:13 PM, David Turner wrote:
> I worked my through the tutorial on compiling ffmpeg with h.265 support 
> found at https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu. The last 
> thing it instructed me to do is 
> PATH="$HOME/bin:$PATH" PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/
> pkgconfig" ./configure   --prefix="$HOME/ffmpeg_build"   --pkg-config-
> flags="--static"   --extra-cflags="-I$HOME/ffmpeg_build/include"   --
> extra-ldflags="-L$HOME/ffmpeg_build/lib"   --extra-libs="-lpthread -
> lm"   --bindir="$HOME/bin"   --enable-gpl   --enable-libass   --enable-
> libfdk-aac   --enable-libfreetype   --enable-libmp3lame   --enable-
> libopus   --enable-libtheora   --enable-libvorbis   --enable-libvpx   --
> enable-libx264   --enable-libx265   --enable-nonfree
> 
> to which I got the following error:
> ERROR: x265 not found using pkg-config

Which Ubuntu version? Did you compile x265 or install the libx265-dev package? 
(The guide offers either option.)
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Re: [FFmpeg-user] file size too big after re-encoding (was: help please)

[Lou Logan]

On Tue, Feb 6, 2018, at 1:02 AM, sarkis yol wrote:
> hey what is the best way to hardcore subtitles into a movie while 
> staying as close as possible to his original size and settings i tried 
> this command:
> ffmpeg -i 1.mp4 -vf "subtitles=1.srt:force_style='FontName=Droid Naskh 
> Shift Alt,Fontsize=21'" -c:a copy "output.mp4"

Always show the complete console output with your command. It will provide 
helpful info.

> but my 770mb movie goes to 1.3gb which is too much
> 
> even though i tried another movie and went from 750 to 800 mb which is good
> but now allot of movies are getting x2 the size any help lease :)

Re-encoding from a lossy input will often result in a bigger file size. There 
are many reasons for this. For example, the input may have been encoded 
efficiently (this could be determined by the format, encoder implementation, 
options used, etc). Secondly, lossy encoding introduces artifacts that become 
part of the video. When re-encoding a lossy input the encoder will attempt to 
preserve details including these artifacts which can be detrimental for 
encoding efficiency resulting in a comparatively higher output file size.

Assuming you're using libx264 it by default tries to achieve a certain quality, 
so trying to guess the output file size is not possible until you do it. 
However, you can use two-passes if you need to target a specific output file 
size. Use the slowest -preset (default is "medium") you have patience for. See:
https://trac.ffmpeg.org/wiki/Encode/H.264

You may also consider using "-c:v libx265" but it is much slower and HEVC may 
not be supported by your playback device.

Alternatively, use softsubs to avoid re-encoding video. Consider outputting to 
MKV if your player supports it as MP4 is a poor choice for softsubs.
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Re: [FFmpeg-user] ffmpeg support for color encoding conversion?

[Lou Logan]

On Fri, Feb 2, 2018, at 10:25 AM, Dan Edwards wrote:
>  Hey all,
> 
> I am looking for an alternate solution to avconv on a Raspberry Pi setup
> running RetroPie.
> 
> Have been trying to use it to convert some videos in the color format
> yuv444p to yuv420p which is needed for a hardware accelerated video
> playback feature in RetroPie.
> 
> But avconv will often crash out with
> 
> Error in `avconv': realloc(): invalid next size
> 
> Does ffmpeg support Linux and if so does it support such a conversion
> method?

Yes and yes.
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Re: [FFmpeg-user] Video Watermark image

[Lou Logan]

On Wed, Jan 31, 2018, at 10:47 PM, Jay Raval wrote:
> ffmpeg version 3.3.4 Copyright (c) 2000-2017 the FFmpeg developers
>   built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-18)
>   configuration: --enable-postproc

Your ffmpeg does not support any H.264 video encoders, so it defaults to using 
the encoder named "mpeg4" which produces MPEG-4 Part 2 video. I doubt it is 
supported by HTML5 video players which I'm assuming is the type of player you 
are referring to.

If you compiled ffmpeg then update your ffmpeg source (3.3 branch is old and 
most users should use a build from git master branch anyway) and re-compile 
with: --enable-gpl --enable-libx264. Or just download a new build from: 
https://johnvansickle.com/ffmpeg/

You can remove --enable-postproc.

Also, consider adding the "-movflags +faststart" output option to your command.
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Re: [FFmpeg-user] ffmpeg ffv1 issue

[Lou Logan]

On Sat, Jan 27, 2018, at 11:01 AM, jeff.radcli...@comcast.net wrote:
[...]
> G:\Post Processed Video>ffmpeg -i testvdub.avi -acodec copy -vcodec ffv1 
> -level 3 -threads 8 -coder 1 -context 1 -g 1 -slices 4 - slicecrc 0 
> testvdub.mkv 

There is a small typo here. Change "- slicecrc" to "-slicecrc".

Others more familiar with this encoder may comment regarding your options.
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Re: [FFmpeg-user] when concatenating video segments ffmpeg shows error: "Media type mismatch between the parsed_overlay_20"

[Lou Logan]

On Sat, Jan 27, 2018, at 1:07 PM, Igor Cabrera wrote:
[...]
> When I execute the resulting command it gives me the error
> 
> the command is this:
> 
> ffmpeg -i "C:\ffmpeg\pruebas\FFBlue_ProjectsFiles\chroma\green1.mov" -i
> C:\ffmpeg\pruebas\FFBlue_ProjectsFiles\fondos\sc.jpg -filter_complex "
> [1:v]scale=iw*3:-1,crop=w=iw/3:h=ih/3:y=(ih-oh)/3:x=((iw-ow)/2)+(ow/2-ow/3),
> boxblur=7:2[fondo_3IZQ] ;
> [1:v]scale=iw*4:-1,crop=w=iw/4:h=ih/4:y=(ih-oh)/3:x=(in_w-out_w)/2,boxblur=6
> :2[fondo_4CEN] ;
> [1:v]scale=iw*5:-1,crop=w=iw/5:h=ih/5:y=(ih-oh)/3:x=((iw-ow)/2)+(ow/2-ow/3),
> boxblur=5:2[fondo_5IZQ]  ; [0]chromakey=color=#83BD46:similarity = 0.1 :
> blend = 0.05,selectivecolor=reds=0 0 0 -1:yellows=0 0.1 0 -0.5:greens=0 0 -1
> 0:whites=0 0 0 -0.7 [vid]  ;  [vid]
> trim=start=0:duration=0,setpts=PTS-STARTPTS,scale=iw*4:-1,crop=w=iw/4:h=ih/4
> :y=(ih-oh)/3:x=((iw-ow)/2)+(ow/2-ow/3)[vid_0] ;
> [fondo_4CEN][vid_0]overlay[toma_0] ; [vid]
> trim=start=0:duration=3.41933,setpts=PTS-STARTPTS,scale=iw*3:-1,crop=w=iw/3:
> h=ih/3:y=(ih-oh)/3:x=(in_w-out_w)/2[vid_1] ;
> [fondo_3IZQ][vid_1]overlay[toma_1] ; [vid]
> trim=start=3.41932988166809:duration=2.85067,setpts=PTS-STARTPTS,scale=iw*5:
> -1,crop=w=iw/5:h=ih/5:y=(ih-oh)/3:x=(in_w-out_w)/2[vid_2] ;
> [fondo_5IZQ][vid_2]overlay[toma_2]  ; [toma_0] [toma_1] [toma_2]
> concat=n=3:v=1:a=1:unsafe=1 [v_concatenado][a_concatenado]" -map
> [v_concatenado]  -map [a_concatenado]
> "C:\ffmpeg\pruebas\FFBlue_ProjectsFiles\chroma\green1_FINAL.mov"
> 
> when I execute it ffmpeg says:
> 
> [Parsed_overlay_20 @ 00404100] Media type mismatch between the
> 'Parsed_o
> 
> verlay_20' filter output pad 0 (video) and the 'Parsed_concat_26' filter
> input p
> 
> ad 1 (audio)
> 
> [AVFilterGraph @ 03527a00] Cannot create the link overlay:0 ->
> concat:1
> 
> Error initializing complex filters.
> 
> Invalid argument

You are telling the concat filter to output an audio stream but you did not 
provide any audio inputs.

1. Add atrim and asetpts filters:

[0:a]trim=start=1:duration=3,asetpts=PTS-STARTPTS[a0];[1:a]trim=start=10:duration=2,asetpts=PTS-STARTPTS[a1];[2:a]trim=start=100:duration=6,asetpts=PTS-STARTPTS[a2];

Adjust the start and duration values to your needs. Refer to the atrim docs for 
more options.

2. Then reference the audio streams in the concat filter:

[toma_0][a0][toma_1][a1][toma_2][a2]concat=n=3:v=1:a=1:unsafe=1 
[v_concatenado][a_concatenado]

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Re: [FFmpeg-user] license cost

[Lou Logan]

On Thu, Jan 4, 2018, at 5:59 AM, Chunduri, anil (SimApps) wrote:
> Hi ,
> 
> Can you tell me license cost for the ffmpeg.

FFmpeg is free. You only have to comply with the license. There is no fee. In 
addition to reading the license refer to:

https://ffmpeg.org/legal.html
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Re: [FFmpeg-user] ADPCM block size for XAudio

[Lou Logan]

On Wed, Jan 3, 2018, at 1:19 AM, Martin (Imagine Earth) wrote:
>
> What does top-post mean?

I'm confident you could have found multiple answers with a simple search, but 
our Mailing List FAQ has a link to an explanation:


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Re: [FFmpeg-user] Sharpen a video

[Lou Logan]

On Wed, Jan 3, 2018, at 9:38 AM, Giang_Le wrote:
> I try to sharpen a video using unsharp filter. I read the documentation and
> used the instruction.
> But I got "videofilename.ext: Unable to find suitable output format for...".
> Could some one give me an example of how to do this exactly?
> Thank you

The most basic example:
ffmpeg -i input.mp4 -vf unsharp output.mp4

However, we can't tell you what you did wrong because you did not provide your 
actual ffmpeg command and the complete console output.
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Re: [FFmpeg-user] Trouble FFmpeg

[Lou Logan]

On Tue, Jan 2, 2018, at 7:21 PM, Tùy Phong wrote:
> Hello ffmpeg's support team, I try hard to using ffmpeg code but I have
> some issue like this
> 
> Error while filtering: Cannot allocate memory
> Failed to inject frame into filter network: Cannot allocate memory
> Error while processing the decoded data for stream #0:1
> 
> 
> What can i do to fix it. Many Thanks!

You need to show your actual ffmpeg command and the complete console output. 
Without this information we can't provide any answers.
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Re: [FFmpeg-user] Transcode from mp4 to wav fails for several files

[Lou Logan]

On Mon, Dec 25, 2017, at 9:53 AM, JD wrote:
[...]
> So, could someone zero in on the script and see what I am missing?

We can only provide help for unscripted, direct usage of the FFmpeg cli tools 
here at ffmpeg-user.

Since this appears to be purely a scripting issue I recommend checking your 
script with shellcheck.net and if you need further scripting help refer to a 
Bash help resource.

As for the ffmpeg part, you can remove "-ab 312k": bitrate is ignored when 
outputting wav.
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Re: [FFmpeg-user] timebase mismatch error

[Lou Logan]

On Fri, Dec 22, 2017, at 1:37 AM, parth awasthi wrote:
> hey, ffmpeg code is showing me time base mismatch error from last 5 days. I
> have not found any solution for this error on internet. My timebase got
> stuck at 25 fps and no videos other than 25 fps is converting. Thank you in
> advance.
> 
> This is my code -:
> exec("$ffmpeg -i $target_file   -c:v libx264  -b:v 54k -pass 1   -r 15 -b:a
> 128k -f mp4 -y NUL && ^",$result);
> 
> exec("$ffmpeg -i $target_file   -c:v libx264  -b:v 54k -pass 2  -r 15 -b:a
> 128k  2>&1 $firstMp4", $result);
> 
> This is an error-:
> 
> [libx264 @ 00ca0bd02480] timebase mismatch with 1st pass (1/15 vs 1/25)'

Show your actual, unscripted commands and the console output from each command 
so we can attempt to duplicate the issue. Also, provide a link the input if it 
is required to duplicate the issue.
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Re: [FFmpeg-user] FFMPEG's MXF container support for DNxHR with Avid MC?

[Lou Logan]

On Thu, Dec 21, 2017, at 3:07 PM, Alan Moore wrote:
> On a separate note, is this the right place to ask questions about the
> FFMPEG API or internals? The ffmpeg-dev list seems to be just patches...

The mailing list for user help regarding the FFmpeg libraries and API is at 
libav-user.

ffmpeg-user is for help using the FFmpeg cli tools.
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Re: [FFmpeg-user] Live stream to periscope or youtube doesn't seems to work

[Lou Logan]

On Sun, Dec 10, 2017, at 03:58 PM, Guilherme Santos wrote:
>
> ~/ffmpeg-git-20171206-32bit-static$ ./ffmpeg  -f x11grab  -video_size
> 1024x768 -i :1  -c:v libx264 -preset medium -crf 28 -pix_fmt yuv420p -r
> 30
> -g 60  -b:v 2M -maxrate 2M -bufsize 1M  -f flv rtmp://
> or.pscp.tv:80/x/avadqqzw8nyv

Can you not use the 64-bit version?

-crf and -b:v are mutually exclusive rate control methods, as mentioned
previously. Use one but not both. In your case -b:v is being ignored.

Remove -r 30 and replace it with -framerate 30 input option as I
mentioned previously. This will prevent the unnecessary duplication of
frames as it will use -framerate 25 for the x11grab input by default if
you don't change it. Adding -r 30 makes it convert from 25 to 30 by
duplicating frames.

> [x11grab @ 0xc3e16a0] 16 bits per pixel screen is not implemented. Update
> your FFmpeg version to the newest one from Git. If the problem still
> occurs, it means that your file has a feature which has not been
> implemented.

I guess this is the problem. Output to a local file and try to play it.
Probably garbage output.

> Stream #0:0: Video: rawvideo (RGB[16] / 0x10424752), rgb565le,
> 1024x768, 29.97 fps, 29.97 tbr, 1000k tbn, 1000k tbc

rgb565le. Mine is bgr0. What's your display server?
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