Re: [FFmpeg-user] pix format change

2020-12-03 Thread Carl Zwanzig

On 12/3/2020 2:59 AM, mjl wrote:

  I am using h264_vapppi to decode video. The output pix_format is vappi_vld,
I want to change its pix_format so that I can get the picture data. So how
can I do this, thank you!


What have you tried already?

z!
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Re: [FFmpeg-user] How do I decode once and pass frames to multiple destinations

2020-12-03 Thread Carl Zwanzig

On 12/3/2020 2:57 AM, Simon Brown wrote:

I can do all 3 of these things individually, and therefore I can do all 3
of these things by running 3 instances of ffmpeg, but at that point my
system is decoding the stream 3 times and I really don't want to spend the
CPU power doing that.


Start with https://trac.ffmpeg.org/wiki/Creating%20multiple%20outputs

If there are difficulties, remember to post the complete command you used 
and it's output (and not to top-post the reply).


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Re: [FFmpeg-user] Compilation Guide / MSVC on Wiki

2020-12-02 Thread Carl Zwanzig

On 12/2/2020 1:20 PM, hinderanyoption81 via ffmpeg-user wrote:

  Do you know where I could get pre-built .LIB etc. files old enough to be used 
under Windows XP?


Perhaps the wayback machine or bitsavers has something. No chance you can 
offload the processing to a more modern machine?


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Re: [FFmpeg-user] Compilation Guide / MSVC on Wiki

2020-12-02 Thread Carl Zwanzig

On 12/2/2020 9:32 AM, hinderanyoption81 via ffmpeg-user wrote:

Upon reading the "Compilation Guide / MSVC on Wiki", I am confused about at 
least three issues.
1. The Guide starts with a sentence "FFmpeg can be built on Windows with Visual 
Studio", and then it says:

Finally, run: For MSVC:
./configure --toolchain=msvc
make
make install


Yep, the instructions aren't clear.

I've successfully built ffmpeg on/for windows using msys2/mingw-w64. You 
need to install msys2, then the compiler packages, then things like (IIRC) 
automake and it's friends, then others. I can look that up later, but the 
first time was a somewhat iterative process in "Can't find ", so I 
install  and try again; eventually it all worked.


Start at https://www.msys2.org/. Also, there are msys and mingw packages, 
most of the time, you need the mingw one.


This is a very useful setup on a windows system.


To answer the MSVC question- I only use it for things that aren't set up to 
build in mingw :).


Later,

z!
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Re: [FFmpeg-user] Uninstalling ffmpeg

2020-12-02 Thread Carl Zwanzig

On 12/2/2020 12:51 AM, Reindl Harald wrote:
i don't give a shit about grammatically, capitals and commas (capitals and 
commas a for losers in every language)


OK, but that says a lot about how you think of other people and about any 
desire to clearly communicate. (Two of the things it says are "I think other 
people are trash" and "I don't care about clarity". True?)



typically i speak programming languages


You do know that pretty much all programming languages have quite strict 
syntax and semantics? Leave out a comma and see what happens.



All this makes me wonder where all the built-up anger came from, and why you 
bother even reading this mailing list. AFAIK you've never actually answered 
a question.


z!
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Re: [FFmpeg-user] Uninstalling ffmpeg

2020-12-01 Thread Carl Zwanzig

On 12/1/2020 2:02 PM, Reindl Harald wrote:

idiot! 


“You keep using that word. I do not think it means what you think it means.” 
– Inigo Montoya, The Princess Bride


before i install something on my system i seek for the information 
how i can uninstall it and unless that's not clear i don't install it


Great for you! You must be the perfect computer user. A great many people 
don't dissect the packages they're about install _and_they're_not_going_to. 
You can complain about it or ignore it and move on with life.


z!

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Re: [FFmpeg-user] Uninstalling ffmpeg

2020-12-01 Thread Carl Zwanzig

On 12/1/2020 11:58 AM, Reindl Harald wrote:

I can't see why you
wouldn't just delete posts and move on


because i can't stand stupidity


Then why are you _adding_ to it? Maybe they could find the answer somewhere 
else, but that's irrelevant- they asked here. You can actually give a useful 
answer, not say anything, or become a target for ridicule. Your choice.


z!
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Re: [FFmpeg-user] Uninstalling ffmpeg

2020-12-01 Thread Carl Zwanzig

On 12/1/2020 11:21 AM, Reindl Harald wrote:

If you don't have anything useful to say, better not to say anything


if the OP would have done "even the slightest research" the whole treahd 
won#t exist, it exists because are people tooo dumb or too lazy (chose what 
you want) to type their idiotic questions into some random search engine


And yet, initially you could have said nothing but chose to insult. Then you 
could have dropped the matter, but didn't. Instead, you're reinforcing your 
own reputation as someone who never actually adds to the conversation but 
only denigrates people -you- think are "stupid".


Since I'm sure it'll a waste of your time, don't bother replying.

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Re: [FFmpeg-user] Uninstalling ffmpeg

2020-12-01 Thread Carl Zwanzig

On 12/1/2020 10:23 AM, Reindl Harald wrote:

How do I uninstall ffmpeg considering this installation process?


That .7z file appears to contain a single statically-linked ffmpeg 
executable, so just delete the file "ffmpeg".



ask whoever provided a useless installer for unix systems


If you'd done even the slightest research (as I did, took under a minute), 
you'd see that the "installer" consists of unzipping the .7z file and 
getting a single ffmpeg executable. Which can then be deleted. (And... 
that's a Mac build, not a *nix build.)


If you don't have anything useful to say, better not to say anything.

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Re: [FFmpeg-user] Using GPU with ffmpeg

2020-11-30 Thread Carl Zwanzig

On 11/30/2020 4:52 PM, madderek--- via ffmpeg-user wrote:

What does on 'cuda mean', and how do you do it?


google again?  (Search cuda ffmpeg, also look at the list archives for a lot 
of discussion about it.)


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Re: [FFmpeg-user] Using GPU with ffmpeg

2020-11-29 Thread Carl Zwanzig

On 11/29/2020 10:07 PM, madderek--- via ffmpeg-user wrote:

ffmpeg -framerate 29.97  -start_number 70001 -i L:\baf1400_70001-9\%06d.tif 
-c:v libx264 -preset veryslow -tune film -profile:v high -pix_fmt yuv420p 
-level 4.1 -crf 17 -r 29.97 -threads 2 L:\baf140070001916tiff.mkv


Output? (need to see that)

And please don't top-post on this list.

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Re: [FFmpeg-user] help needed, combine three simple calls into one?

2020-11-27 Thread Carl Zwanzig

On 11/26/2020 5:52 AM, Ram Shaffir wrote:

From: ffmpeg-user  On Behalf Of Ram
Shaffir
Sent: Thursday, November 26, 2020 2:53 PM
 Is it possible to combine the following three calls into one call instead?



ffmpeg -y -f concat -safe 0 -copyts -i videoList.txt -muxpreload 0 -muxdelay 0 
-c copy -b:a 128K -cpu-used 0 -preset slow -movflags +faststart -f mp4 
concat.mp4
Make one file out of ??? files. Does this also re-encode anything? (What are 
the input formats? see below)



ffmpeg -y -i concat.mp4 -itsoffset 1.9 -i concat.mp4 -c:a aac -c:v copy -map 
0:v:0 -map 1:a:0 -f mp4 audioFixed.mp4

Shift the audio a bit and re-mux.


ffmpeg -y -i audioFixed.mp4 -ss 2 -to 17 -c:v copy -c:a aac -f mp4 final.mp4

Select part of the now-shifted file.


Sometimes, there is no gain to creating more complex directives. In this 
case, it might reduce the amount of de/remux work, but the time-shift 
suggests pretty much means you're stuck with intermediate file(s). Might 
combine the 2nd and 3rd commands.


Since you only select 17 seconds from the output, you could add a 20 second 
limit to the first step, which would potentially make the intermediate files 
smaller. (Another thing we don't know.)


Consider using another _container_ type for the intermediate file(s) (e.g. 
nut, avi, or mkv, which can hold the mp4 data).


You could also, in the first pass, write to separate files for audio and 
video, which might simplify the shift/remux process and then apply the 
time-based selection to that (see 
https://trac.ffmpeg.org/wiki/Creating%20multiple%20outputs).


Move the "faststart" to the last step since that's where it would matter (it 
gets in the way of piping, if used, and it adds a second file write pass).


I haven't yet tried any of this, and there's probably an error somewhere in 
there.


As usual, it really helps to see the command output so we know the file 
formats/etc.


z!
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Re: [FFmpeg-user] emerge has unconnected output? Works on FFMPEG 4, not 3

2020-11-23 Thread Carl Zwanzig

(Please don't top-post on this list)

On 11/23/2020 12:42 PM, Karl Messner wrote:

I'm hosting on HostUpon, that's what they have. Is there a more
up-to-date cheap hosting platform with ffmpeg?

They ought to update themselves

Do you need to run on a hosting platform at all? ffmpeg runs on a lot of 
systems; most people run it on their own local boxes.


If you can copy files to/from HostUpon, you should be able to copy over a 
static build and use that- it doesn't require any special permissions to run.


I don't know of -any- hosting platforms that explicitly provide ffmpeg, but 
I expect any that sell linux would have it.


Later,

z!
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Re: [FFmpeg-user] emerge has unconnected output? Works on FFMPEG 4, not 3

2020-11-23 Thread Carl Zwanzig

On 11/23/2020 7:14 AM, Karl Messner wrote:

ffmpeg version 3.0.2 Copyright (c) 2000-2016 the FFmpeg developers


Do you -need- to use version 3*? Those options/filters may not exist or have 
the same semantics. In pretty much all cases, you're on your own for old 
versions (although Michael has given some good suggestions). The general 
recommendation would be to use a current build.


Unless there's a difficult reason, I'd put the effort into using v4 instead 
of trying to make v3 work.


*Pre-build versions are available from https://johnvansickle.com/ffmpeg/. If 
you _need_ version 3, try a somewhat later static build from there, it has 
3.3 and 3.4.


Later,

z!

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Re: [FFmpeg-user] Slide show with transition

2020-11-18 Thread Carl Zwanzig

On 11/18/2020 10:30 PM, RAPPAZ Francois via ffmpeg-user wrote:


No, it is a very bad idea.
You are certainly a supporter of that software and bad software practice in 
general.
This can be coded with ease to be done with FFmpeg either via shell or 
programming.


Please be careful with quoting- Paul B Mahol wrote those words, not me (I 
commented on them).



Yes, can you give an example with FFmpeg ?


A question for Paul.

z!
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Re: [FFmpeg-user] Slide show with transition

2020-11-18 Thread Carl Zwanzig

On 11/18/2020 9:13 AM, Paul B Mahol wrote:

No, it is a very bad idea.

Why? (explanation missing)


You are certainly a supporter of that software and bad software practice in
general.
I support things that work; IrfanView works well for a great many people and 
for the jobs it was designed to do; so do XNview, OBS, ImageMagick, VLC, and 
a raft of other packages.


Then explain why it's "bad practice" (and whether you're referring "to 
support that software" or "to run all the images through it" or something 
else?). Normalizing formats/resolutions/etc is a common practice when 
working with multiple sources.



This can be coded with ease to be done with FFmpeg either via shell or
programming.
Again, explanation missing. If it could be done "with ease" it should have 
been quick to provide an example, especially to a neophyte (the OP); I'd 
expect nothing less from someone with your experience. Take the opportunity 
to help someone learn instead of throwing barriers in their way.


Later,

z!
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Re: [FFmpeg-user] Slide show with transition

2020-11-18 Thread Carl Zwanzig

On 11/18/2020 7:55 AM, Michael Koch wrote:

Size is the size in pixels or in bytes ?


width and height

(pixels/resolution) The byte count will vary with the image compression.

Using Irfanview to process all the images into a common format is a good idea.

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Re: [FFmpeg-user] segment_atclocktime problem

2020-11-15 Thread Carl Zwanzig

On 11/15/2020 9:41 AM, Tom Worster wrote:


What can I do to prevent this and get ffmpeg to write files with the 
atclocktime? instead of what I assume is the actual time when the file is 
written.


Depending on the actual implementation, you might not be able to- it's 
common to write into a temp file and at the trigger time close & rename, 
which takes some time; that rename could happen after a seconds boundary 
depending on system load. Someone would need to look at the code to really know.


You may be better off with a cron job that looks for "01" files and renames 
them; run every segment_time but a few seconds delayed; something like 
"rename 01.m4a 00.m4a *.m4a".


(probably not relevant here, but it's always good to post the full command 
output)


Later,

z!

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Re: [FFmpeg-user] FFMPEG image2 : Error setting option start_number

2020-11-03 Thread Carl Zwanzig

On 11/3/2020 12:46 PM, seb seb wrote:

How can i change the limit of the start_number  (from "int" to "long long")?

[cid:1964a44c-e32e-42b7-9ef2-b8326c50f7e3]


Please post the text (complete command and the output), not an image; that 
make it much easier to see.


z!
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Re: [FFmpeg-user] Applying the LGPL to ffmpeg usage

2020-11-03 Thread Carl Zwanzig

(changed the subject line)

On 11/1/2020 12:07 PM, Carl Eugen Hoyos wrote:


If the question is "am I allowed to distribute a binary based on (L)GPL
software" then the answer does not depend on static or dynamic linking.


That's not clear (to me), please point me to the relevant section of the 
LGPL and describe how it applies.




Am Mo., 26. Okt. 2020 um 06:44 Uhr schrieb Carl Zwanzig : >> 
There are cases where you can share a dynamic build (no GPL parts) that

links to non-free libraries but not a static build. (I think building with
BMD Decklink support is in that catagory.)



No.

That is not clear what it refers to.


Decklink is not GPL-compatible.


We know that the BMD code itself is not _GPL_ compatible (although the 
headers & api appear to be), but when ffmpeg is built with NO GPL the LGPL 
would apply. By my understanding of that license, you can both dynamically 
link -to- LGPL code from proprietary code and link -from- the LGPL code to 
proprietary*. The only questions is whether ffmpeg's CLI front-end is 
considered a "library" for the purposes of the license and how the 
proprietary parts are distributed.


*Note- that does not, and should not, imply that the libraries are being 
_distributed_ together.


It would certainly be compliant to write one's own code and dynamically link 
to both LGPL and proprietary libraries (and to distribute the result), and 
that appears to be commonly accepted by other opensource projects (e.g OBS, 
CasparCG, MLT, etc; they have plugins for both BMD and NewTek NDI).



If any of that is not correct, please point me to the parts of the LGPL, or 
guidance from the FSF, that cover it because I'm not finding anything.


z!
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Re: [FFmpeg-user] where to post suggestion for the documentation?

2020-11-03 Thread Carl Zwanzig


On 11/3/2020 9:07 AM, Paul B Mahol wrote:

I was directing reply not to you but to Jim, who is known to spread malice
and untrue statements on this mailing list.


For those of use who aren't privy to everything- what wasn't true? Please 
tell us. (Hint- opinion can be neither true nor false.)


From my limited view, what Jim said makes sense in context, and I can 
extrapolate that the gatekeepers to the code really aren't interested in 
minor patches from other people, nor fixing or even mentioning problems 
identified by other*. The ticket Jim linked 
(https://trac.ffmpeg.org/ticket/8944#comment:3) does illustrate this- a 
single sentence could easily be added to the docs to warn users of this 
behavior but instead Cigaes fights it (possibly taking more time than to 
make a patch).


*this may not be true, but it appears that way

AND, even someone skilled in unix operations might not realize that 
limitation about pipes (I wouldn't have thought of it and I've been using 
BSD unix since 1988). Maybe I don't know "unix" at all.


AND, that might not apply when running on another OS with different pipe 
semantics or permissions.



On 11/3/2020 9:20 AM, Phil Rhodes via ffmpeg-user wrote:
[...] the way you relate to people on this list is emphatically not 
normal for English-language professional interaction. [...] I have

nothing to gain from saying this so please take it in the spirit in which
it is intended. You are damaging yourselves and the project and it is 
completely unnecessary.

Selectively quoting, but I agree with all of what Phil said.

Later,

z!
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[FFmpeg-user] Building on windows

2020-11-01 Thread Carl Zwanzig

On 11/1/2020 3:33 PM, Carl Eugen Hoyos wrote:

If you cannot use prebuilt binaries but have to build Windows binaries
yourself, wsl is the best option.


Are there specific technical reasons for that? I've been using MinGW-64 and 
that works rather well (for me), next would be VC++ since I occasionally 
need to build using it, WSL I'd have to install.


z!
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Re: [FFmpeg-user] 4.3.1 configure error

2020-10-30 Thread Carl Zwanzig

On 10/30/2020 10:10 AM, MediaStream wrote:

Attempting to build *static* FFmpeg 4.3.1 on AWS EC2 Amazon-Linux 2
instance.
x265 v.3.4



*ERROR: x265 not found using pkg-config*
*Please advise on a proper course of action*


Install x265? (is it already installed using another method?)

z!

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Re: [FFmpeg-user] sudo: ffmpeg: command not found

2020-10-29 Thread Carl Zwanzig

On 10/29/2020 12:02 PM, Reindl Harald wrote:


* everybody is born to read "ERROR" at the end of configure

Un, no they're not, nor to understand what it means and *whether* it's relevant.

* everybody is born to realize that "Try again from the top, git clone a 
fresh working copy" is idiotic - 
No they're not, and yet we're always telling people to pull the latest and 
try thatHmm, pick one.



* the error message was even clear

If you actually understand it.

* using "sudo" in front of everything is idiotic and not relevant to ffmpeg, 

Idiotic? maybe not. Unwise and unnecessary, probably.


Face it, Reindl, no one is as smart as you or has as much insight or 
experience as you do and they never will. You can either be a help people 
learn or you can be an ass. All of your emails suggest the latter.


Heck, _you_ might even learn something in the process.

z!
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Re: [FFmpeg-user] Could not write header for output file #0 (incorrect codec parameters ?)

2020-10-29 Thread Carl Zwanzig

On 10/29/2020 1:50 AM, USMAN AAMER wrote:

How can I resolve the issue?


Start by posting the entire command output that fails.  (and remember not to 
top-post on this list)


z!
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Re: [FFmpeg-user] sudo: ffmpeg: command not found

2020-10-28 Thread Carl Zwanzig

On 10/28/2020 3:37 PM, Reindl Harald wrote:


which shell don't respect PATH?

Not relevant.

either make your binary available in PATH or type the fucking full qualified 
path to it


Such polite language (and really, NOBODY has such expansive knowledge 
and experience as you do, and it's ridiculous to expect it)


look up the 'rehash' command sometime, it's kinda important for csh-based 
shells.


z!
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Re: [FFmpeg-user] sudo: ffmpeg: command not found

2020-10-28 Thread Carl Zwanzig

On 10/28/2020 2:02 PM, Reindl Harald wrote:
learn about https://en.wikipedia.org/wiki/PATH_(variable) or type your f**g 
path full qualified - basics not related to ffmpeg


Or first ask if the OP is using a c-shell derivative where "rehash" is the 
correct command to make new ones accessible (don't assume everyone uses 
sh-based shells).


Marc- you need to learn a bit about the usual directory structures and how 
the PATH variable is used.


z!
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Re: [FFmpeg-user] (no subject)

2020-10-26 Thread Carl Zwanzig

On 10/26/2020 4:22 PM, juan carlos rebate wrote:

It is not my intention to do top posting, this is because I do not like to use 
mail apps, I like the graphical interface web, and this does not have options 
to avoid it


Yes it does, I do that all the time, both in the android app and in a 
browser (click on the three dots to expand the reply text, then edit).


z!
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Re: [FFmpeg-user] Trying to Reduce Sizes of Movies Ripped with MakeMKV

2020-10-25 Thread Carl Zwanzig


On 10/25/2020 10:40 PM, Marc Barrett wrote:

I am ripping the DVDs (and Blu-Rays) in exactly the same way: with MakeMKV,
to MKV containers. As the name suggests, MakeMKV rips to MKV containers.
MakeMKV is a GUI utility, so there is no output that I can post.


But there _is_ output from ffmpeg, and that can tell us a lot about the 
files. For instance, just what's in the mkv file? (Use ffprobe to see that.)



I get no error messages, and the MKV files play wonderfully with the
Plex client/server software.

How about with vlc or ffplay?


The following command works, it just does not take advantage of my video
card:

ffmpeg -i in.mkv -map 0 -codec:a copy -codec:s copy -max_muxing_queue_size
4096 out.mkv


(Output needed)


Please do not top-post on this list.

z!
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Re: [FFmpeg-user] (no subject)

2020-10-25 Thread Carl Zwanzig

On 10/25/2020 10:14 PM, Juan carlos Rebate wrote:

However if you compile two separate versions
there would be no licensing issue if you share it, would it?


If you "share" the build, then technically you're distributing it. The one 
that's GPL only is perfectly fine to share (following the rules of the GPL, 
please read them), but if non-free parts are statically linked in, then 
I don't think that one is distributable.


The questions that drive "can I distribute" include-
Is this a static or dynamic build?
Does it contain GPL components?
Does it contain non-free components?
There are cases where you can share a dynamic build (no GPL parts) that 
links to non-free libraries but not a static build. (I think building with 
BMD Decklink support is in that catagory.)


(Unfortunately, there doesn't seem to be a simple matrix to cover this. 
Maybe I'll write one up sometime.)


A big question is whether you need --enable-gpl or not.


Please don't top-post on this list.

z!
Oh, ya, I Am Not A Lawyer
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Re: [FFmpeg-user] (no subject)

2020-10-25 Thread Carl Zwanzig

On 10/25/2020 9:16 PM, Juan carlos Rebate wrote:

my question is derived from the license problem that does not allow
gpl codecs together with non-free codecs


I may be mistaken, but as I understand the GPL, if you're not distributing 
anything (building for your own use), there are no license problems with 
mixing GPL and non-free/encumbered/proprietary components. That means you 
could use -enable-nonfree and -enable-gpl at the same time (I can't actually 
try that at the moment).


If you -do- want to distribute ffmpeg, then you simply can't mix GPL and 
proprietary/non-free parts.


z!
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Re: [FFmpeg-user] Trying to Reduce Sizes of Movies Ripped with MakeMKV

2020-10-25 Thread Carl Zwanzig

On 10/25/2020 3:24 PM, Ted Park wrote:

I wonder if the BD/DVD ripping software you are using can be made to
transcode so you wouldn’t have to do this.
And I also wonder if the rip is _upscaling_ the dvd to 1080 instead of 
leaving it at SD resolution since about the longest dvd movie will be around 
a 5GB mpeg2 file.


How are you ripping the dvd?
Into what container?
(complete command lines and output, please).

I almost always decrypt/rip from the dvd to a .vob file, then convert from 
there.


z!
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Re: [FFmpeg-user] Converting text to video for dictation

2020-10-20 Thread Carl Zwanzig


On 10/20/2020 6:52 AM, Edward Park wrote:

You say it’s not very efficient using your video editor (I assume
something along the lines of Avid, PPro, FCPX/Motion), but I don’t think
FFmpeg is the right tool for the job, unless you had some really complex
ass subtitles already, using a bunch of v4+ features of the script and
you just need to burn it into the video.


This kinda sounds like something you'd with Adobe After Effects.

z!
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Re: [FFmpeg-user] ffmpeg does nothing but using CPU

2020-10-20 Thread Carl Zwanzig

On 10/20/2020 10:33 AM, Cecil Westerhof wrote:

What could be happening here?


Please post some more info, at the least the complete command and the output 
of the last invocation in by the script.


Later,

z!
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Re: [FFmpeg-user] problem capture desktop

2020-10-18 Thread Carl Zwanzig

On 10/18/2020 11:25 AM, Juan carlos Rebate wrote:

I have already solved the problem, for those who want to solve...


(a) do not top post on this mailing list


El dom., 18 oct. 2020 a las 20:12, Carl Zwanzig () escribió:

offlist



(b) DO NOT REPOST offlist messages! That's incredibly rude.

z!
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Re: [FFmpeg-user] MPEG TS+PS parser

2020-10-17 Thread Carl Zwanzig

On 10/16/2020 11:54 PM, Mark Filipak (ffmpeg) wrote:

On 10/16/2020 10:14 PM, Carl Zwanzig wrote:
You're absolutely right, Carl.


BTW, I go by "z" (how I sign my email).

There are a fair number of mpeg-ts parsers already out there in a variety 
of languages ...


Really? Do you mean VOBEdit? All that I've seen are formatted as pretty 
pictures and all that I've seen have errors. 


Acually, I didn't even think of vobedit. A quick search turned up-
https://github.com/jeoliva/mpegts-basic-parser
https://github.com/jeeb/mpegts
https://github.com/daniep01/MPEG-2-Transport-Stream-Packet-Analyser
https://www.serbod.com/--cc/mpeg-ts-parseranalyzer
https://tsduck.io/

One of them probably does what you want or can be modified to.


I used SNOBOL about 35 years ago to quickly write very powerful parsers. I'm 
looking at Unicon now.


If you're going that direction, you may be better off with something like 
Rust or java/javascript (assuming that c/c++ are off the table); definitely 
something that already has some mpeg code available (rust does).


I'll take further discussion off the ffmpeg list because it's no longer 
on-topic.


Later,

z!
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Re: [FFmpeg-user] MPEG TS+PS parser

2020-10-16 Thread Carl Zwanzig

On 10/15/2020 1:44 AM, Mark Filipak (ffmpeg) wrote:

Got any suggestions how I should proceed?


I hate to say this, but you're rather reinventing the wheel (and building it 
out of toothpicks).


There are a fair number of mpeg-ts parsers already out there in a variety of 
languages, and the kind of structure you've used is going to be slow and 
resource-intensive. If nothing else, if you're using the bash shell use a 
case statement to separate out the translations (instead of passing 
everything through one HUGE pipeline).


(This is not a task for pattern substitution.)

Later,

z!
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Re: [FFmpeg-user] ffmpeg doesn't see audio stream

2020-10-16 Thread Carl Zwanzig

On 10/16/2020 6:18 PM, Ivan Gorin wrote:

Yes, I've tried both of them, used different values from 1 million and
higher, no change. Was doing something like  ffmpeg -probesize 10
-analyzeduration 10.Still sees only the video stream. Maybe I'm not
using them correctly, can you give an example?


You could post in the results of those attempts.

https://greshka.net/avicheck/ Suggests using "ffmpeg -v 5 -i INPUT.avi -f 
null -" to scan the file and also has some pointers to other tools. I'm not 
able try any of them at the moment; the video processing machine is behind a 
wall of boxes from some reconstruction.


(Also, please don't top-post.)

z!
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Re: [FFmpeg-user] ffmpeg doesn't see audio stream

2020-10-16 Thread Carl Zwanzig

On 10/16/2020 12:41 PM, Ivan Gorin wrote:

[avi @ 0x558097763700] New audio stream 0:1 at pos:18113032 and DTS:0s
[avi @ 0x558097763700] New audio stream 0:2 at pos:18113032 and DTS:0s



Have you tried using -analyzedurarion and -probesize with relative large 
values to find the streams? See the doc for exact behavior and values.


z!
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Re: [FFmpeg-user] Problem getting ffmpeg to stream encrypted SRT

2020-09-30 Thread Carl Zwanzig

On 9/30/2020 1:43 PM, Tim McClure wrote:

When I stream ffmpeg SRT to Wowza without encryption it works however when I
stream SRT encrypted I get the error listed below.  I can use other software
to stream encrypted SRT to Wowza and it works so I think the issue is on the
ffmpeg side.  Here is the script I am using:ffmpeg -v verbose -re -i
IndagoLE.ts -map 0:0 -pix_fmt yuv420p -vsync 1 -vf scale=1024:576 -vcodec
libx264 -r 25 -g 100 -sc_threshold 0 -threads 0 -b:v: 2048k -bufsize 2244k
-maxrate 2560k -preset veryfast -profile:v baseline -tune film -f mpegts
srt://192.168.1.118:5090?pbkeylen=16=1234567890123456_size=1316The
error returned is:ubuntu@5df3bfb7d42b5:~$ ffmpeg version N-99339-ge71d73b
Copyright (c) 2000-2020 the FFmpeg developersbuilt with gcc 7 (Ubuntu
7.5.0-3ubuntu1~18.04)configuration: --enable-protocol=libsrt --enable-libsrt


please repost as plain text, the line wraps make the output almost unreadable.

thx,

z!

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Re: [FFmpeg-user] should I shoot the dog?

2020-09-29 Thread Carl Zwanzig

ig·no·rant /ˈiɡnərənt/
adjective
lacking knowledge, information, or awareness about a particular thing.

On 9/29/2020 1:40 PM, Paul B Mahol wrote:

It is cryptic only for ignorant folks.


Gee, maybe that's why they're asking questions- to gain a "knowledge, 
information, or awareness about a particular thing". Some parts of ffmpeg 
are rather complex and it's irrational to expect everyone else to understand 
them. (And RTFS is not usually a good answer.)




But ignornat folks should not be here at all, because they are, guess what,
ignorant.


Sounds like you're equating "user" with "ignorant" which is a fine way to 
insult quite a lot of people. Since this is the ffmpeg -users- list, not the 
-developers- list, it's not surprising that some people don't or can't read 
the code (which isn't a requirement to using it, last I checked) or don't 
grok the subtleties. Is that really such a problem? When someone does try to 
understand things, insulting them off does not increase anyone's 
understanding. Remember that not everyone has your knowledge of the code, 
and it's ridiculous to expect it.



z!
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Re: [FFmpeg-user] should I shoot the dog?

2020-09-29 Thread Carl Zwanzig

On 9/29/2020 12:43 PM, Paul B Mahol wrote:


On Tue, Sep 29, 2020 at 10:26:20AM -0400, Mark Filipak (ffmpeg) wrote:

And thanks for that. So, ffmpeg really is a Tower of Babel, eh? That does
not seem wise to me. That seems like a great way to generate bugs in
addition to confusion.



Now if that is not trolling out of pure ignorance I dunno what is.


Actually, it sounds like it might be an accurate representation of the 
entire codebase. Cryptic code without explanations _is_ a good way to cause 
bugs, at least that's my experience (which goes back a fair ways).


That said, as with many systems which evolve over time, the interfaces and 
understandings morph although the explanations often don't. And when there 
isn't a single entity (is there?) to direct the process and a single 
cohesive view of how things should go, chaos happens. One example was a 
while ago when someone suggested that a specific option was not consistent 
with other related ones- the great hew and cry was "WE CAN"T CHANGE THAT!!!" 
instead of "Hmm, it might make more sense to change this one for 
consistency's sake, yes, it'll break some older usages, but it'll be more 
logical in general."




I'm really asking mysefl why are there still people feeding this poor troll.


Because he's contributing to the overall knowledge? A lot of things are 
being described that I've found to be quite useful and _should_ be part of 
the overall documentation, be it in code comments or separate files.


A note to Mark F.-
If you refuse to try understanding even the basics of 'c', which shouldn't 
be that difficult to anyone who has ever programmed, you're holding yourself 
back.


z!

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Re: [FFmpeg-user] Unable to reencode corrupt video file

2020-09-27 Thread Carl Zwanzig

On 9/27/2020 10:44 AM, Schampignon Cristobal via ffmpeg-user wrote:

[mxf @ 018fbf7f9000] could not resolve source track sequence strong ref
[mxf @ 018fbf7f9000] broken or empty index
[mxf @ 018fbf7f9000] error getting stream index 4294967295
[mxf @ 018fbf7f9000] Could not find codec parameters for stream 0 (Video: 
mpeg2video, none(tv, top first), 1920x1088): unspecified pixel format
Consider increasing the value for the 'analyzeduration' and 'probesize' options


Have you tried including those values?  I've had some success on damage 
files with rather long analyzeduration and probesize options, see the doc 
for details.


Not that I think it will make a difference, but it's always good to try the 
latest ffmpeg available (at all, not just packaged for your platform).


Also, "copy" does not re-encode but it should re-mux.

z!
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Re: [FFmpeg-user] How to create "Input #1", "Input #2" etc. in addition to "Input #0"?

2020-09-27 Thread Carl Zwanzig

On 9/27/2020 5:27 PM, James Darnley wrote:
Please do not top post. 


And the formatting makes the ffprobe output difficult to read. If you (the 
OP) is posting in HTML, turn that off and stick to plain text.


See https://ffmpeg.org/mailing-list-faq.html


If I understand the question-
there is a container holding multiple input streams and you want those 
streams to go into a stream-capable output container. Yes?


Or is this question of copying metadata/stream names to the output container?

Examples of commands you've tried along with the full output would clarify 
things.


z!
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Re: [FFmpeg-user] ffplay struggling with this station!

2020-09-24 Thread Carl Zwanzig

On 9/24/2020 6:29 AM, Firas Shahin via ffmpeg-user wrote:

But this tells me that it must be the software versions, since you didn’t have 
any issues.


Always try with the current ffmpeg (and please do not top-post replies).

Later,

z!
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Re: [FFmpeg-user] MPEGTS changes the duration of my video

2020-09-24 Thread Carl Zwanzig

On 9/24/2020 12:41 AM, Mar Andrés López wrote:

When I process my video with ffmpeg and I set the format to mpegts, ¿why
It changes the duration of my video from 00:00:04.56 to 00:00:04.00?


Please include the complete command line and output when asking a question. 
If you're not using a really current build of ffmpeg, try that, too. (And 
also do not top-port replies.)


z!
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Re: [FFmpeg-user] ffplay struggling with this station!

2020-09-23 Thread Carl Zwanzig

Hello,

Please limit the use of "!"...

On 9/23/2020 3:19 PM, Firas Shahin via ffmpeg-user wrote:
ffplay version 3.2.15-0+deb9u1 Copyright (c) 2003-2020 the FFmpeg developers  built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516 
That's quite an old version, you'll need to try with an up-to-date build, 
preferable from the "git head" (see https://ffmpeg.org/download.html). Also, 
be careful in posting from yahoo as its html->plaintext converter loses 
line-ends; this makes the output much harder to read.


Later,

z!
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Re: [FFmpeg-user] 5% of audio samples missing when capturing audio on a mac

2020-09-22 Thread Carl Zwanzig

On 9/22/2020 8:42 AM, Carl Zwanzig wrote:

(which some of the things I was recalling, too)

which -corrects-

sigh, I shouldn't post before the coffee takes hold.

z!

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Re: [FFmpeg-user] 5% of audio samples missing when capturing audio on a mac

2020-09-22 Thread Carl Zwanzig

On 9/22/2020 8:29 AM, Edward Park wrote:

I might be making up the history behind it, but 44.1kHz was basically
just workable, with 20kHz assumed to be the “bandwidth” limit of sound
intended for people to hear, 40kHz would be needed to encode sound
signals that dense, and the extra 4.1kHz would help get rid of artifacts
due to aliasing - and probably the biggest factor was the CD.


My recollection is that you're substantially correct- tradeoffs of number of 
the bits on a CD, human hearing (most people can't actually hear up to 
20kHz), however


"The official Philips history says this capacity was specified by Sony 
executive Norio Ohga to be able to contain the entirety of Beethoven's Ninth 
Symphony on one disc.[25] This is a myth according to Kees Immink, as the 
EFM code format had not yet been decided in December 1979, when the decision 
to adopt the 120 mm was made. The adoption of EFM in June 1980 allowed 30 
percent more playing time that would have resulted in 97 minutes for 120  mm 
diameter or 74 minutes for a disc as small as 100  mm. Instead, however, the 
information density was lowered by 30 percent to keep the playing time at 74 
minutes"

(which some of the things I was recalling, too)


As for 3/1001- that's an artifact of NTSC analog television trying to 
fit color information into a b/w signal and then later applying SMPTE 
timecode to the resulting frame rate. There's a good explanation at 
https://en.wikipedia.org/wiki/SMPTE_timecode#Drop-frame_timecode


z!
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Re: [FFmpeg-user] 5% of audio samples missing when capturing audio on a mac

2020-09-21 Thread Carl Zwanzig

On 9/17/2020 7:28 PM, amin...@mailbox.org wrote:

Can you explain this? I'm trying to get (30/1.001) or the rounded 29.97 to 
divide 48k cleanly or be a clean ratio but I don't see it.


It doesn't, but 48k samples per second is a nice number (and does divide 
nicely by 24,25, and 30). 3/1001 is simply messy to deal with (~ 
=29.97002997002997002997002997003), and unless you have specific timing 
hardware pretty much impossible to run at the absolutely correct rate.


z!
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Re: [FFmpeg-user] Question about -noauto_conversion_filters

2020-09-14 Thread Carl Zwanzig

On 9/14/2020 4:57 AM, Michael Koch wrote:

On 14-09-2020 04:54 pm, Gyan Doshi wrote: >> Each filter presents a list of 
input formats they can work with and a list

of output formats they can directly generate. [...]



Thanks for good explanation!


Yes, that makes sense. Could that be included in the filters docs? :)

The likely spots seem to be-
ffmpeg-filters.html section 2
ffmpeg-all.html as a new section 3.2.3
https://trac.ffmpeg.org/wiki/FilteringGuide (I don't have a wiki login so I 
can't include that into the filtering guide; maybe later, busy week ahead)


Later,

z!
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Re: [FFmpeg-user] Problem about duration value of converted mp3 file

2020-09-14 Thread Carl Zwanzig

On 9/13/2020 11:47 PM, Edward Park wrote:

Okay, so the file displays 25:47 in Media Player and plays... how long?


Yep, and I also asked that almost two weeks ago.

The only sure ways to know the actual Total Running Time (TRT) are either to 
render it in real time or to count the frames/samples and calculate based on 
the frame/sample rate (which only works on fixed/constant frame rates and 
even that can be suspect). (Well, maybe by looking at the PTSs.) Most tools 
will only tell you the TRT/duration that was saved in metadata and that's 
often untrustworthy; this sounds like one of those cases.



To the original poster- please do not "top post" on this mailing list.

z!
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Re: [FFmpeg-user] Are pipe's slow?

2020-09-10 Thread Carl Zwanzig

On 9/10/2020 1:28 AM, Simon Brown wrote:

Equally, if I
run myTestOnDemandRTSPServer from a file then it can play it without
issue.  It seems to be the combination of the two that causes the problem.


Are you sure that the server is actually reading from the pipe? That is-

cat myfile | ./myTestOnDemandRTSPServer

is myTestOnDemandRTSPServer a script or an executable?
does it read from stdin?
is myTestOnDemandRTSPServer silently crashing when it connects to the pipe?
is it expecting the same format as the other device produces?

(it's not clear how you've tried things or which OS you're using the 
command output is always wanted here, as is using the most recent build)


*nix pipes should should have very little latency, so if you manage to stuff 
15 seconds of video into one it's probably not being emptied


You can exercise the pipe mechanism itself with

ffmpeg -i udp://:61120 -c:v copy -an -f h264 pipe:1 | cat - >/dev/null
That should run basically forever.

z!
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Re: [FFmpeg-user] Output to S3

2020-09-08 Thread Carl Zwanzig

On 9/8/2020 6:07 AM, Bohdan Fihar wrote:

I can't rely on "aws s3 cp", since it can be not installed on a machine
where I will run ffmpeg.


A couple of things-
Isn't or can not be?
Please just post the error text, not an image of it (actually, you ought to 
be posting the complete/unedited command and output).


(and do not top-post on this list)

z!
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Re: [FFmpeg-user] Convert DNG

2020-09-07 Thread Carl Zwanzig

On 9/7/2020 1:51 AM, Michael Koch wrote:

Again spreading misinformation, this needs to stop.

I kindly ask people who do not want good to this project,
to just unsubsribe from the list.


What's wrong in my answer?


EXACTLY!

If something _is_ "misinformation" then correct it! Simply saying "that's 
wrong" does nothing to help.


Let's get back to the matter at hand-
The results from searching around for "cinemadng ffmpeg" does suggest that 
cinemadng is not fully implemented in ffmpeg. Yes? No? What are the limits?



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Re: [FFmpeg-user] "interlace"

2020-09-06 Thread Carl Zwanzig

On 9/6/2020 12:33 PM, Carl Eugen Hoyos wrote:

Or in other words: We will certainly not change our definition of
"interlaced video" - many people seem to understand it.


Sounds rather strong ("certainly not"), but those of us coming from the NTSC 
analog world all understood the concept of "interlaceD video" and the 
various word forms of it. We also understood the 5-blade shutter, 3:2 
pulldown, etc. Unfortunately, that often gets muddied when people coming 
from the progressive-scan world try to understand it.


Ref- https://en.wikipedia.org/wiki/Interlaced_video (which is pretty good)

With all of the latent issues with the ffmpeg docs, arguing over a "d" does 
not seem productive.


Later,

z!
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Re: [FFmpeg-user] builds for Windows

2020-09-03 Thread Carl Zwanzig

On 9/3/2020 1:49 PM, Mark Filipak wrote:
I'm not sure but I think building ffmpeg is pretty time-consuming. If I 
obtain help figuring out how to do it -- dependencies have defeated me -- I 
can do Linux makes, perhaps on alternate days. If others do the same, the 
task can become distributed and less of an individual burden.


I'm up for that.

Mark- build environment makes a fair difference; I use MinGW-64 and it works 
fairly well, that is, no hairy problems that I recall :).


z!
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Re: [FFmpeg-user] builds for Windows

2020-09-02 Thread Carl Zwanzig

On 9/2/2020 11:31 AM, Carl Eugen Hoyos wrote:

Am Mi., 2. Sept. 2020 um 20:29 Uhr schrieb Michael Koch
:


"ffmpeg.zeranoe.com will close on Sep 18, 2020, and all builds will be
removed."

Any idea where we can get builds for Windows after this date?


The FFmpeg project only provides source code, no builds.


An absolutely correct reply that doesn't actually answer the question asked. 
However, since the ffmpeg project _does_ list places to download pre-built 
versions (including zeranoe), it's rational to ask on this list.


Is anyone going to take up the task? The compute part is covered but I don't 
have sufficient space or bandwidth to serve as a build distribution platform.


z!
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Re: [FFmpeg-user] Problem about duration value of converted mp3 file

2020-09-01 Thread Carl Zwanzig

On 9/1/2020 1:21 AM, myounggun jang wrote:

The duration of the original wav is 1:09:30, but the length of the
converted MP3 is 1:07:16.


Are those durations from actually playing the file? It's not uncommon for 
the container's metadata to be wrong and it sounds as if that's what's wrong 
(when different tools show different info, it's usually a metadata problem).


Please verify that the output file actually has 1:09:30 of content.

And what are you trying to accomplish? Just re-encoding the files or 
something else?


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Re: [FFmpeg-user] Trouble grabbing from TV capture device

2020-08-27 Thread Carl Zwanzig

On 8/27/2020 1:52 PM, Simon Roberts wrote:

I have a little device that takes "old" composite video and sends it out to
USB. It's recognized by video4linux2 and I can watch the VHS tapes that I'm
trying to capture using xawtv simply using:

v4lctl -c /dev/video2 setnorm NTSC
v4lctl -c /dev/video2 movie fps 29.97
and then "xawtv"

When I start xawtv it says it's getting audio from hw:3,0


Do you have a sound connection from the vcr to this device? Does it actually 
have good audio on it? Tried another source? (composite video does not have 
embedded audio)


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Re: [FFmpeg-user] Hoping to make multiple input seeking outputs based on a text file (inspired by concat)

2020-08-27 Thread Carl Zwanzig

On 8/27/2020 9:35 AM, James Sundquist wrote:

I'd like to make a series of input seeking based outputs from the same
source video.  Ideally each will be taken from a text file called
edits.txt.  Otherwise every single new output means defining:

Start point + Duration (or End Point) + name of new clip

ffmpeg -ss [Start] -i original.mp4 -t [Duration] exercise-1.mp4


Seems like a very simple script to do this. IMHO, this type of task 
shouldn't be built into ffmpeg.


z!

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Re: [FFmpeg-user] Some more thoughts on documentation

2020-08-23 Thread Carl Zwanzig

On 8/23/2020 12:30 PM, Mark Filipak wrote:
Developer preparation: Kindly add comments to the source code. The comments 
don't need to teach or explain. They just need to repeat the code's logic, 
but in English instead of Martian.


I think we'll have to disagree on that, most of the basic logic should be 
fairly clear to someone who knows the 'c' language. OTOH, there will be some 
cases they -do- need to be explained; there are always points in code which 
aren't obvious to the casual reader - could be some obscure part of the 
encoding, could be that it fails on some architectures but not on others, 
could be that a certain flag isn't appropriate, etc. But in general, most 
code out there isn't well commented, anyway. (Way back when, code wasn't 
considered well-commented if less than maybe 20-25% of the non-blank lines 
were comments.)


See also
https://ffmpeg.org/developer.html#Comments and
https://ffmpeg.org/developer.html#toc-Code-of-conduct

However that doesn't directly affect the user documentation.

Later,

z!
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[FFmpeg-user] Some more thoughts on documentation

2020-08-23 Thread Carl Zwanzig

Hello,

I'm fairly sure that someone will object to a point below. Go ahead, but 
also suggest something better; if you can't think of an improvement, maybe 
it's better not to say anything. (And if something is not correct, tell us 
what is; just saying "Wrong!!" is not helpful.)



On 8/23/2020 12:15 AM, Gyan Doshi wrote:
Yes, there's only one source repository for the documentation text, and the 
format is texinfo.


Original content:
- is it correct? (anecdotal info suggests it isn't always, see other emails 
about docs)


- are pieces missing? (intentional or not) (e.g. IIRC the docs still do not 
list the values set by -target, it should) A user shouldn't need to look at 
the source code; if they do, it's a failure to document.


- are parts redundant? (it the same thing is covered in two different 
places, that's probably one too many)


(If parts of the texinfo file(s) are created from other source code, we have 
to go back to those files and check all that again. And also ask whether the 
sourcefile->texinfo process is correct.)



Process to create output docs:
- does it really include/exclude the correct parts?
- does it always run without intervention and is resilient to input errors?
- does it gracefully handle process and input errors and report them?


Output organization & formats:
- are they appropriate & usable for the different audiences? (some like the 
man pages, some like the -all pages, some want more segmentation and 
cross-linking, etc)
- do they follow commonly-accepted rules for that format (i.e. "man page" 
format)?

- is the some way to make them more usable?

The purpose of all of that is to (re)verify correctness, not to find fault 
in someone else's work, and unless a point is actually verified and 
checked-off, then it's still unknown. This is all basic QA stuff.



"Rules of the game"? Not rules but maybe guidelines. If someone objects to a 
doc update...
- because the content is wrong- point to the code that doesn't match (just 
saying "wrong!!" isn't helpful; nor is saying RTFS! unless it points to the 
relevant code)
- because the text is too long- propose something shorter with at least the 
same info

- because the language is awkward, suggest how to reword it
- because you just don't want it changed- explain why


Charlie's Rule of Technical Reading
It doesn't say what you think it says, nor what you remember it to have 
said, nor what you were told that it says, and certainly not what you want 
it to say, and if by chance you are its author, it doesn't say what you 
intended it to say. Then what does it say? It says what it says. So if you 
want to know what it says, stop trying to remember what it says, and don't 
ask anyone else. Go back and read it, and pay attention as though you were 
reading it for the first time.

--Charles E. Beck, P.E., Seattle, WA c2005

Later,

z!
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Re: [FFmpeg-user] Why is format=rgb24 required after maskedmerge?

2020-08-22 Thread Carl Zwanzig

On 8/22/2020 2:03 AM, Nicolas George wrote:

There is no duplication, only multiple outputs. Would you also remove
the man pages because they are "duplicate" of the HTML pages?


Multiple outputs is not duplicative? If the same info in the same format is 
in two places, that rather sounds like duplication.


Re man pages- last time I checked, those are not considered web pages and 
have a different format & usage, therefore not the same. (OTOH, I don't use 
the man pages, so. see below.)



It's obviously easy for anyone adverse to change to find examples of "it's 
not like that!!". It should also be obvious that different styles of 
documentation work for different people- some always go to a man-page style 
doc, some find topic/area-based html pages easier to use. Don't like one of 
those? Don't use it. But also don't denigrate those who do.


And... how many questions on this list wouldn't need to be asked if the docs 
provided the answer _to_the_questioner_? Half? Two-thirds? If the docs were 
really great, we probably wouldn't be having this discussion.


Later,

z!
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Re: [FFmpeg-user] Why is format=rgb24 required after maskedmerge?

2020-08-21 Thread Carl Zwanzig

On 8/21/2020 3:33 AM, Michael Koch wrote:
I never found that "General Documentation" file because I thought 
"ffmpeg-all" contains what the filename implies: All. This is obviously not 
the case. The filename is misleading, if the file doesn't contain all 
documentation. Wouldn't it be better to combine these two files into one 
file, which contains really all?


IMHO, it would make more sense to remove the -all file as it's unweildly and 
doesn't seem to contain to contain everything anyway. I might go so far as 
to start carving things up so there's little to no duplication at all (is 
there much? I don't know, that bears checking. One example is stream 
selection/specifiers.)


Later,

z!
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Re: [FFmpeg-user] Why is format=rgb24 required after maskedmerge?

2020-08-21 Thread Carl Zwanzig

On 8/21/2020 10:59 AM, Paul B Mahol wrote:

I think git usage is far less complicated than ffmpeg.
Also git should be better documented too.


Both of those are true :), but still can be mystifying.

For those on windoze, there are git GUIs available that take some of the 
pain out; I generally use "Tortoise GIT". (Otherwise, I really don't like 
git/hg/svn/cvs/etc (the no-server SCMS's), but those are what too many 
people use.)


Re pointers- consider them an assembly language address.


z!
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Re: [FFmpeg-user] How to have a secure UDP BroadCast

2020-08-19 Thread Carl Zwanzig

On 8/19/2020 5:22 AM, Moritz Barsnick wrote:

Perhaps the original poster meant "broadcast" in the sense of
"sending"?


I suspect that's the case- not broadcast in the networking sense.

z!
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Re: [FFmpeg-user] libx265 a lot slower

2020-08-17 Thread Carl Zwanzig


On 8/17/2020 1:53 AM, Phil Rhodes via ffmpeg-user wrote:

People, be polite. Harald, you are incredibly impolite. This is a user
list. It is reasonable for people to ask basic questions here. Your
assumption that everyone is an expert is unreasonable.

Exactly. And many people will readily say that "common sense" isn't very common.


On 8/17/2020 8:12 AM, Reindl Harald wrote:
i don't need knowledge about cars to guess that one needs more fuel when 
he drives double as fast while put a big stone in the luggage space


i don't even need to own a car for that
Maybe not, but you _do_ need to have even the vaguest idea of mass/energy 
equilibriums (even without knowing that term). Many people have very little 
idea what goes on in a video codec, let alone why one might be faster than 
another on some hardware or why some streams are more compressible than others.


Instead of saying "this is obvious! why are you asking??" you could just 
patiently explain the answer. Or not answer at all and leave it to someone else.


z!
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Re: [FFmpeg-user] libx265 a lot slower

2020-08-16 Thread Carl Zwanzig


Reindl is known for acerbic and unhelpful answers, AFAICT most readers 
ignore them.


On 8/16/2020 10:02 AM, Cecil Westerhof wrote:


For the moment I will keep with 264. Especially because these files
are only played once. Just wanted to make sure I was not overlooking
something.


Probably not; for a one-use file, I'd take whichever one is easier to deal 
with (which might mean quickest to encode). And depending on the source 
material, and well, everything in the chain, you might use another codec 
anyway, there's nothing mystical/magical about x264 (and a few decidedly 
unfriendly things- ref "moov atom location").



By the way: when searching on the internet, I saw often said that 265
would be half as big as 264, but I see 'only' a third less space
taken. Are the people saying 50% overly optimistic, or do I just have
'strange' videos?


"Never generalize."

I'd take any size estimate as a guess since your content and encoding 
parameters are probably different. If my own tests of x265 showed 30% 
smaller but 2x the encode time, I wouldn't bother.


Later,

z!

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Re: [FFmpeg-user] Getting audio correct (Zoom meeting)

2020-08-15 Thread Carl Zwanzig

On 8/15/2020 3:14 AM, Cecil Westerhof wrote:

I understood that there are different ways to record Zoom meetings. (I
am not doing it myself, I only get the results.) I found that what I
got was extremely small. (A video of six minutes only took 56.7 MB.)
What would be the best way to record Zoom meetings so they can be
processed by ffmpeg the best?


There are some settings ("Optimize for 3rd party video editor"), but in 
general zoom compresses for space, not quality.


Another option is to use some screen-capture software and record it that way.

z!
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Re: [FFmpeg-user] Unable to use hardware encoder h264_rkmpp with software decoded ATSC OTA transmission using rk

2020-08-13 Thread Carl Zwanzig

On 8/13/2020 12:28 PM, Brad Bruggemann wrote:

ffmpeg version 589de66a0b Copyright (c) 2000-2018 the FFmpeg developers


Always the first question- have you tried an up-to-date build of ffmpeg? If 
not, please do.


Later,

z!
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Re: [FFmpeg-user] Grid of videos starting at different times

2020-08-12 Thread Carl Zwanzig

On 8/12/2020 9:13 AM, Randy Johnson via ffmpeg-user wrote:

What does "op-post" mean? I am not familiar with that term.


Sorry, "top-post"

z!
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Re: [FFmpeg-user] Grid of videos starting at different times

2020-08-12 Thread Carl Zwanzig

please do not op-post on this list

On 8/12/2020 6:58 AM, Randy Johnson via ffmpeg-user wrote:

I did a ton of reading yesterday but cannot figure out how to expand this
to more than 2 videos. I am getting hung up on how to read the
complex_filter.
There are several examples of multi-picture filter-graphs in the ffmpeg 
wiki, a quick search should turn them up.


z!
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Re: [FFmpeg-user] Loading shared libraries in macOS

2020-08-12 Thread Carl Zwanzig

On 8/12/2020 4:52 AM, Aleksid wrote:

They can be loaded only if I use --prefix=/usr/local/Cellar/ffmpeg and then
put dylibs into  /usr/local/Cellar/ffmpeg/libs folder.


Then do that, it's what --prefix is for.


I understand that it is correct in a world of Unix systems. But I would
prefer to keep dylibs locally, without copying into the system folder.


MacOS is in many ways a *nix system.


This is not an ffmpeg question, this is about how macos handles libraries. 
You'll probably get better information if you learn more about that.


On 8/12/2020 8:01 AM, Aleksid wrote:

Well, I can copy FFmpeg dylibs to /usr/local/bin. But FFmpeg version
4.1, 4.2, 4.3 use the same file names, for example libavcodec.58.dylib.


Yes, that's correct.


What should I do if  /usr/local/bin already contains dylibs with these
file names? How can I guess about version 4.1, 4.2 or 4.3? If another
program will rewrite these dylibs, and I'll get an older version of
FFmpeg libs? It's another kind of dylib hell.
The whole point of shared libraries is that many applications can use them. 
If you want only your app and your build of ffmpeg to use these particular 
lib, make a subdir and put them in there.


z!
(who goes by 'z', not 'Carl')
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Re: [FFmpeg-user] FFmpeg distribution help

2020-08-05 Thread Carl Zwanzig

Hello,

Please read the mailing list FAQ which instructs people not to top-post.

On 8/5/2020 1:45 PM, Don Fotheringham wrote:

Is there no procedure that allows for some path to an agreement of user
fees or whatever?


There is not; the GPL and LGPL don't need one, follow the compliance 
checklist on the legal page and move on. Be mindful of patents, which are 
discussed at the bottom of the legal page.


You'll find a lot of info searching on "using lgpl in commercial software", 
including http://answers.google.com/answers/threadview/id/439136.html



So, you your organization _requires_ a specific agreement naming all the 
parties, you/they will be out of luck. OTOH, if you/they are comfortable 
with the LGPL, make a good attempt to comply and there shouldn't be any 
problems.


Later,

z!
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Re: [FFmpeg-user] FFmpeg distribution help

2020-08-05 Thread Carl Zwanzig

On 8/5/2020 1:26 PM, Don Fotheringham wrote:

We have developed software that requires the distribution of FFmpeg
(included in the download). Our intention is to sell the software.
Who do I contact to inquire further about how to proceed regarding
permission, royalties, fees etc.?


Since ffmpeg is licensed under the LGPL, it would be good to start with 
https://ffmpeg.org/legal.html and http://www.gnu.org/licenses/gpl-faq.html. 
That should pretty much cover things.


A search of this mailing list will turn up similar info. See also 
https://ffmpeg.org/mailing-list-faq.html.


z!
just another reader of this list
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Re: [FFmpeg-user] Input Buffer ovverun with Decklink 8K Pro and Nvenc

2020-08-05 Thread Carl Zwanzig

On 8/5/2020 12:23 PM, jroch via ffmpeg-user wrote:

I figured out i was not setting pixel format.


And I should have noticed that- BMD boards are famously finicky about the 
parameters.



About top post, sorry for that, i don't even think i know what this is
about.


Use google?

z!
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Re: [FFmpeg-user] How can I get a duration and fps of any video that corresponds with the number of frames that can be read?

2020-08-05 Thread Carl Zwanzig

On 8/5/2020 9:52 AM, Tom Burrows via ffmpeg-user wrote:

I need to get the duration of any video file such that when multiplied
with the media's fps value (in this case, either ’tbr’ or ‘fps'), it
equals the number of frames in the video.
That works until you find a variable frame-rate video. I have found that to 
get a truly accurate duration or frame-count, you have to effectively render 
the entire file, even if to /dev/null. It does take (much) longer, but it's 
not really a re-encode, just a copy.


A prime example of this is an mp2 pulled out of a dvd vob- I've seen a lot 
of cases where the metadata info is wildly wrong* or that parts of the video 
change between 24 fps and 29.97, there's also the 3:2 pulldown flag


*duration 00:46:13 on a 90 minute movie? I think not.

AFAICT, no video tool has solved this without running the entire stream. You 
might take one approach for fixed-rate containers/encodings and another for 
variable-rate.


Later,

z!
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Re: [FFmpeg-user] Input Buffer ovverun with Decklink 8K Pro and Nvenc

2020-08-05 Thread Carl Zwanzig

On 8/5/2020 10:10 AM, jroch via ffmpeg-user wrote:

Any ideas on how to troubleshoot this ?


First- post the complete command output.

Second- check to see that your system has enough resources (cpu/mem/etc), in 
general, to make this work. (Try using the BMD MediaExpress program to capture.)


Third- try capture w/o encoding and send that to /dev/null. Does it fail?

(and last- remember not to top-post on this list)

Later,

z!
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Re: [FFmpeg-user] How to create good video from low quality jpeg

2020-07-28 Thread Carl Zwanzig

On 7/28/2020 2:17 PM, Kawada Tsuyoshi wrote:

I executed same command on Ubuntu 20.04 again.
I got good quality video.


Note that the linux disrto version doesn't matter at all, only the ffmpeg 
version.


And please do not "top-post" on this mailing list.

z!
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Re: [FFmpeg-user] How to create good video from low quality jpeg

2020-07-27 Thread Carl Zwanzig

On 7/27/2020 5:26 PM, Kawada Tsuyoshi wrote:

$ ffmpeg -r 30 -i %03d.jpg -vcodec libx264 -pix_fmt yuv420p -r 30 out.mp4


Please post the complete & unedited command output, that will tell us a lot 
about what you're doing.


z!
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Re: [FFmpeg-user] trouble installing ffmpeg

2020-07-22 Thread Carl Zwanzig

On 7/22/2020 1:53 PM, Jake McGaker wrote:

and when I get to the
step after I edit the environmental variables and I type in the cmd prompt,
I get an error saying ffmpeg didn't install.


Almost no one here is going to watch the video, please just explain what's 
going on and include the command and output of what you're doing in the 
email. (And do not top-post when replying.)


Which OS?
Where did you get ffmpeg?
Are you trying to -build- it or install pre-build binaries?
What commands?

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Re: [FFmpeg-user] Webcam capture

2020-07-22 Thread Carl Zwanzig

On 7/22/2020 6:22 AM, Rodolfo Medina wrote:

Same problem also with simply:

  $ ffmpeg -f alsa -i hw:1,0 -f video4linux2 -i /dev/video0 out.mpg

, and audio completely out of sync...


And complete command output is still missing (it's always helpful)

Since this works--
mencoder tv:// -tv driver=v4l2:width=640:height=480 [...]

The computer you're using may not have enough resources to process those 
large frames. If the native resolution of the devices is 3200x2400, that's 
23MB/frame, and encoding often needs to keep a few in memory at once. As you 
tried in mencover, dial down the capture size in ffmpeg and see if that work.


z!
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Re: [FFmpeg-user] How i can add to my stream browser source (chat, donation alerts, follow alerts etc, like in obs) and create delayed stream (like in obs) with complex filter ?

2020-07-22 Thread Carl Zwanzig

Please don't top-post on this list


stream browser source (chat, donation alerts, follow alerts etc, like in

What does that mean?  Is that a single graphic overlay or something else?


create delayed stream (like in obs) with complex filter?

I think you'll find that in the list archive.


On 7/22/2020 6:35 AM, KoreanFanOfficial wrote:

I cant use obs-studio and other forks, cuz obs have bug with mouse speed
(mouse speed up x4 and its unplayable, but settings [xorg, DE, etc] for
mouse even didnt change), this happens on linux and on windows. So no
reason to use obs and other forks until they fix this issue.


How does mouse-speed affect the streaming? I can say that when I use OBS on 
windows, the mouse isn't an issue. Are you sure it's an OBS problem and not 
some other interaction on your systems? (If it was OBS, I'd expect there to 
be a bug filed on that already and a fix in progress. Did you check on the 
OBS forums?)



Depending on how complex the problem really is, and you really need to 
explain it more thoroughly, doing that with ffmpeg might require you to read 
a lot of the documentation and do a lot of experimenting. Or, you could 
figure out the mouse problem instead and use OBS.


z!
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Re: [FFmpeg-user] Fwd: Understanding/preventing buffer overruns

2020-07-20 Thread Carl Zwanzig

On 7/20/2020 9:57 AM, Simon Roberts wrote:

Splitting this into five separate commands, generating five separate
output files, running them in background simultaneously, works without
any overruns, dropped frames, or any other complaints.


This more suggests either a threading/process management issue within ffmpeg 
or that the underlying OS is starving the ffmpeg process for resources. 
(IIRC, some codecs/etc are single-threaded.)


Which OS?

What are the CPU/memory usages in each running scenario?

Try capturing uncompressed video to the null device; then try encoded to a 
null device; that should show if there's an issue with the encoder or 
elsewhere. Try using a different encoder, too, for test.



And please give us the cmd output (again)- at least with the headers, stream 
info, and a few error messages.


Later,

z!
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Re: [FFmpeg-user] ffmpeg extract hdmv pgs subtitle from mkv to srt or ssa

2020-07-19 Thread Carl Zwanzig

On 7/19/2020 9:05 AM, Ramon Brea wrote:

Please help. Thanks


Please include the complete command line and all of the output. That will help.

(and as a pre-reminder, do not "top post" on this mailing list)

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Re: [FFmpeg-user] Causes of color bars?

2020-07-14 Thread Carl Zwanzig

On 7/13/2020 8:47 PM, Simon wrote:

So now, assuming my logic is sound, my question would be how can ffmpeg
detect the connected signal is present (it "knows" which channel is "live")
and yet not read the video signal?


Decklink boards are _very_ touchy about formats and parameters. Try setting 
at least the resolution and frame rate on the input and see if that helps.


I don't guarantee these, but it's a start:
-f decklink -pix_fmt uyvy422 -s 720x486 -r 3/1001 "DeckLink SDI 4K"

Later,

z!
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Re: [FFmpeg-user] Newb Help! Extracting pics from recovered video file/ or repair recovered video file

2020-07-13 Thread Carl Zwanzig

On 7/13/2020 10:20 AM, frank rizo wrote:

I’m not that smart with all this, so, how do i find out that
information? with a working video from the same source?
ffprobe will report a lot of info about a video file; I find MediaInfo to be 
useful for that, too.


With that, you -may- be able to tell ffmpeg what to expect, and it -may- 
find something. After that, it gets into what's close to wizardry. You'll 
have to ask yourself whether recovering any video is worth the time and 
effort. A good analogy is looking for a needle in a haystack when you don't 
know exactly what the entire needle looks like.



Please don't top-post on this mailing list; if you're not familiar with the 
term, a quick search will turn up lots of info.


z!
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Re: [FFmpeg-user] Newb Help! Extracting pics from recovered video file/ or repair recovered video file

2020-07-13 Thread Carl Zwanzig

On 7/13/2020 10:06 AM, Paul B Mahol wrote:

This can be done only if we know which codec where stored in file.


Yep.

Data recovery is always uncertain, whether from a single file or from a hard 
drive- if you can't find some indicator of what's where, it's all just 
random data (this is why many file systems keep copies of the "superblocks" 
all over the disk, so if it can't find one, it might find another). Most 
video file formats don't do that.


By knowing the container, codec, and resolution, a program -might- be able 
to step through the file looking for something familiar and then, through 
trial and error, -might- be able to assemble/recover some of the data.


This is not something ffmpeg is designed to do.

z!
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Re: [FFmpeg-user] Documentation of chromanr filter

2020-07-11 Thread Carl Zwanzig

On 7/11/2020 1:39 AM, Paul B Mahol wrote:

Can you elaborate what you tried and what failed?


Why does it matter???

Someone has gone to the effort to identify a problem and suggest a solution. 
I'd expect that whomever has been maintaining that code would welcome this 
and incorporate that doc change almost immediately (looks like almost the 
simplest thing to change).


As Michael points out, being a "user" list there are few people on it who 
are developers; you're expecting one of them to install (and learn) git, 
pull the code, _find_ that piece of the doc, created a git patch, and send 
it up to where it might be rejected for a trivial and opaque reason. That is 
not rational. What _is_ rational is for the code maintainer to say "Oh, 
cool, that looks better that what I have, I'll use it." And if that specific 
developer doesn't read this list, I'm willing to bet that someone who does 
can send them the relevant info.


(I've been on both the developer and QA sides of the process. People can 
make it easy or they can make it difficult; I prefer the former.)


Later,

z!
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Re: [FFmpeg-user] Compiling on an aarch64 machine

2020-07-08 Thread Carl Zwanzig

On 7/8/2020 3:24 AM, Verachten Bruno wrote:

On Tue, Jul 7, 2020 at 10:49 PM Carl Eugen Hoyos  wrote:


Am Di., 7. Juli 2020 um 21:34 Uhr schrieb Verachten Bruno :


CFLAGS='-mfpu=neon'


This is apparently not ignored (I thought it should be) and you are
therefore responsible not to set these variables.


Thanks a lot. Unfortunately, These variables are not set on my machine...
or am I mistaken?
set|grep -i CFLAGS returns nothing, as set|grep -i fpu .


A cursory check says that's being set by configure, try running that with 
"--disable-neon". That may cause other problems, but it's a quick thing to 
check.


z!

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Re: [FFmpeg-user] Immediate crash on windows.

2020-07-02 Thread Carl Zwanzig

On 7/2/2020 6:41 AM, Sam Holder wrote:

Any ideas ... how best to proceed with troubleshooting?


It's _always_ best to include the entire command line and output when asking 
for help here, even it there's almost no output.


Have you tried that build on another version of windoze?
It works correctly outside of a VM? (that's not entirely clear)
..which VM system?
..tried some other static builds?

Need more information about the environment and what you've tried.

Later,

z!
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Re: [FFmpeg-user] "Four up" output?

2020-06-27 Thread Carl Zwanzig

On 6/27/2020 8:53 AM, Simon Roberts wrote:

1) create a composite output that has all four of the inputs laid out one
per quadrant, so all can be seen on a single display


Google "ffmpeg multiviewer", you'll find a handful of ideas, including this-
https://trac.ffmpeg.org/wiki/Create%20a%20mosaic%20out%20of%20several%20input%20videos

That should get you started.

z!
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Re: [FFmpeg-user] How to merge several segments of a video to the original video?

2020-06-25 Thread Carl Zwanzig

On 6/25/2020 5:50 AM, mikelee164396 wrote:

When I tried to merge, there was an error. See the attachment error.txt for the 
error content and command line.


Please place those in the email body. Very few people will download and open 
the 7z file. Also, what do the .key and .m3u8 files look like?


z!
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Re: [FFmpeg-user] To Speed Up thumbnail creation - picture & video

2020-06-23 Thread Carl Zwanzig

On 6/21/2020 10:23 PM, Arunava Banerjee via ffmpeg-user wrote:

ffmpeg version 2.8.15-0ubuntu0.16.04.1 Copyright (c) 2000-2018 
That version is positively ancient in software terms. First thing is to get 
a current version (the -git head version is recommended, but at least a 
4.2.3 build), start from https://ffmpeg.org/download.html.




The videos exists on AWS S3, and we are fetching them using S3 signature
url, generating the thumbs and uploading back.

We have noticed that FFMPEG takes quite sometime to create the thumbnails,
which is creating a wait time on the part of the interface.


How much of that time is moving the data around and how much in ffmpeg? It 
may be that your data pipe is slow or that it's being throttled somewhere. 
(How long does it take to generate thumbs/etc from/to local storage?) A 
second possibility is that your local system is underpowered for the task. 
Look to those before suspecting that ffmpeg is slow.


Also, it might be cheaper, let alone faster, to use an amazon EC host to run 
ffmpeg and save on the bandwidth costs of down/up-loading the data. You'll 
have to run the numbers yourself to figure this out.


Later,

z!


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Re: [FFmpeg-user] timeout error when reading RTSP/RTP incoming audio stream

2020-06-17 Thread Carl Zwanzig



On Tue, Jun 16, 2020 at 9:45 AM Yannick Barbeaux 

 ^^

(Strange thing though : "Receive your own posts to the list?" is set
to "Yes" in my subscription settings and I do not receive them).


gmail tends to omit posts that you've already seen, and that includes posts 
you send to a list. This a known behavior-


https://wiki.list.org/DOC/I%20use%20Gmail-Googlemail%2C%20but%20I%20can%27t%20tell%20if%20any%20of%20my%20messages%20have%20been%20posted%20to%20the%20list

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Re: [FFmpeg-user] Add delay to stream on twitch/youtube/restream.io, add chat and alerts

2020-06-15 Thread Carl Zwanzig

On 6/15/2020 10:17 AM, Rob Hallam wrote:

Is this still true? In OBS, Settings → Advanced there is a "Stream Delay"
section (mentioned onhttps://obsproject.com/wiki/OBS-Studio-Overview).

The default setting of 20s estimates mem usage of 11MB; I set the option
to 120s which increased the memory usage estimate to 69MB. Even five
minutes 'only' uses 174MB.


I'd assume that obs is delaying encoded stream packets, not something that 
an ffmpeg filter can do (they work on uncompressed frames between decode and 
encode).


Best thing is for the OP to try it and see if that's what they need.

z!
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Re: [FFmpeg-user] Add delay to stream on twitch/youtube/restream.io, add chat and alerts

2020-06-15 Thread Carl Zwanzig

(please do not top-post on this list)


On 15/06/2020, KoreanFanOfficial  wrote:

Hello. I want to add delay, chat and alerts to my stream with ffmpeg. How i
can do it?


On 6/15/2020 3:48 AM, Tom Sparks wrote:

Have you looked at OBS[1]?

OBS filters can only add a short delay.


Add delay- how long? (delay is memory- or disk-intensive*)  OBS can insert a 
short delay, but longer ones usually mean writing data into a file and 
playing it back later (which could be only 5 seconds). There are many 
"gotchas" around that with file format and record/play timing. Please start 
a separate email thread for that.


*(back-of-the-envelope calculation) if you assume uncompressed 8-bit RGB HD, 
that's over 6MB/frame, a 30 second buffer at 30fps will need to be something 
like 6GB (spinning disks aren't fast enough for this, needs to be SSD or 
in-memory)


Add "chat"- that's not a function of the stream.

Add "alerts"- what does that mean in this case?

z!
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Re: [FFmpeg-user] [NVIDIA] Video conversion key frame becomes blurred

2020-06-13 Thread Carl Zwanzig

On 6/13/2020 4:55 AM, 黑雨天 wrote:

I converted the mp4 video clips into key frames, using the above hardware
and commands, the video became very blurred after the conversion. The
video bit rate is very high and should not be the case.

What is the question?

We need to see the complete/unedited output from the command you ran, and 
you need use the most current build of ffmpeg (which may be newer than the 
one your distribution offers).


(And you're reminded not to "top-post" replies here.)

z!
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Re: [FFmpeg-user] Compression issue using ffmpeg

2020-06-12 Thread Carl Zwanzig

On 6/12/2020 10:59 AM, Moritz Barsnick wrote:

On Fri, Jun 12, 2020 at 16:46:30 +, FFmpeg user discussions wrote:


Requesting you to read the entire email and kindly help me in solving
this. I'm in urgent need of this fix.


And you asked this question a few days ago.


ffmpeg -i Input0.mov -y -fpre ./preset/mp4_Projector.ffpreset -astrict -2 
-vsync vfr -acodec copy -vcodec copy -s 1280x720 Output0.mp4



The "copy" codec tells ffmpeg not to "compress", but instead leave the
original streams intact, as confirmed here:


And that was also said a couple of days ago.

z!

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