On 14-02-2019 06:39 AM, Yuntaek Lim wrote:
I could not find any constraints about channel count, cannot describe greater
than 2, for audioSampleEntry from iso 14496-12:2015.
However, I've found "When values greater than 2 are used, the codec
configuration should identify the channel
2019-02-13 23:23 GMT+01:00, Ulf Zibis :
>
> Am 13.02.19 um 20:23 schrieb Lou Logan:
>>> 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 was just wondering, that option "-pass"
Hi Ted,
Thank you for your replying.
I want to make clear your explain.
> It is an old container format with varied history.
Do you mean "audioSampleEntry version 0" is old container?
> Many fields in iso container file boxes are just there to maintain
compatibility, and ignored & set to
Am 13.02.19 um 20:23 schrieb Lou Logan:
> https://trac.ffmpeg.org/wiki/Encode/H.264
Thanks, I know this page.
>> 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 was just wondering,
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
Hi,
I'm looking for a way to detect repeated fragments in a video file.
About 8 years ago I wrote some code to do this (based upon perceptual
hashing), but that code is owned by my old employer and I have no access to
it any more.
And of course now I need something similar
What I did was
On 2/13/2019 1:43 PM, John Hooper wrote:
ffmpeg version 3.4.2 Copyright (c) 2000-2018 the FFmpeg developers
That's rather old. Can you try with a newer version? Git head version is
usually the best (and is what most people will ask for anyway).
z!
On 2/13/2019 1:15 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,
AFAICT, ffmpeg seldom updates any doc that isn't auto-generated from the
source code. OTOH, it's free
Thanks, sorry but although I initially said it is repeatable, that looks to
not be the case anymore. Anyways, outputting from the files and getting
the exact output will not be possible, but here is a generic output with my
version details.
ffmpeg version 3.4.2 Copyright (c) 2000-2018 the FFmpeg
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, no command posted in the different pages referring to the
project works correctly, in the previous one I tried to use a format
that according to
> On Feb 13, 2019, at 10:04 AM, Ted Park wrote:
>
> I wonder if adding -f mov to the output options, or just using mov extension
> makes it handle the timecode track?
Thanks Ted.
I'm not familiar with the -f option and didn't immediately find it in the
FFmpeg documentation
How does that
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:
On 2/13/19, John Hooper wrote:
> Hello, first time posting to the list. I had some trouble using the filter
> 'telecine' with ffmpeg using the following code:
>
> *ffmpeg -i /inputpath.mov -vf telecine -vcodec prores -profile:v 3 -s
> 1920x1080 -acodec copy -map 0 /outputpath.mov*
>
> Going
On 14-02-2019 12:27 AM, Gyan wrote:
On 13-02-2019 10:32 PM, Harvey Pikelberger wrote:
-i '/Path/To/ProRes/Source.mov' -map 0 -map -0:d -g 48 -c:v
libx264 -profile:v baseline -crf 16 -c:a aac -b:a 256k -vf
scale=1280:720 -pix_fmt yuv420p '/Path/To/Mp4/Dest.mp4'
Oops, removed the
On 13-02-2019 10:32 PM, Harvey Pikelberger wrote:
I've got a bunch of 4- and 5-audio-track ProRes sources.
I want to create h.264/mp4 proxies of each, matching the source audio assigns
The FFmpeg code I'm using is tripping up over time code and codec issues.
Here's the code:
-i
Hello, first time posting to the list. I had some trouble using the filter
'telecine' with ffmpeg using the following code:
*ffmpeg -i /inputpath.mov -vf telecine -vcodec prores -profile:v 3 -s
1920x1080 -acodec copy -map 0 /outputpath.mov*
Going from a ProRes422 HQ source. It seems to be
> a problem in which the ffmpeg shut down automatically in 2-3
> days
> log files are generated in order of 100s of gbs
wow.
I am curious, but you haven’t told us anything about the command except that it
crashes.
The “open file limit” is probably one of several limits the process was
Hi Ted,
Thank you so much for your help and suggestions. I tried a few different
permutations of what you recommended, but without luck. :(
It seems that nothing I'm trying does anything other than *delay the start* of
the video. The video itself still isn't delayed.
For example, I
> On Feb 13, 2019, at 12:02 PM, Harvey Pikelberger wrote:
>
> [mp4 @ 0x7fe633006000] You requested a copy of the original timecode track so
> timecode metadata are now ignored
> [mp4 @ 0x7fe633006000] Could not find tag for codec none in stream #2, codec
> not currently supported in container
I've got a bunch of 4- and 5-audio-track ProRes sources.
I want to create h.264/mp4 proxies of each, matching the source audio assigns
The FFmpeg code I'm using is tripping up over time code and codec issues.
Here's the code:
-i '/Path/To/ProRes/Source.mov' -map 0 -g 48 -c:v libx264 -profile:v
2019-02-13 15:07 GMT+01:00, Brian J. Murrell :
> A piece of software I'm using is trying to remux a file and running
> into an error:
>
> $ ffmpeg -f avi -i file:"/tmp/vid.avi" -sn -codec:v:0 copy -flags
Unrelated:
Generally, you shouldn't force an input format and certainly
not for avi.
>
On Wed, Feb 13, 2019 at 09:07:35 -0500, Brian J. Murrell wrote:
> $ ffmpeg -f avi -i file:"/tmp/vid.avi" -sn -codec:v:0 copy -flags
> -global_header -fflags +genpts -vsync -1 -map_metadata -1 -map_chapters -1
> -threads 0 -codec:a:0 ac3 -ac 6 -ab 192000 -y "/tmp/vid.mkv"
"-fflags +genpts" is
A piece of software I'm using is trying to remux a file and running
into an error:
$ ffmpeg -f avi -i file:"/tmp/vid.avi" -sn -codec:v:0 copy -flags
-global_header -fflags +genpts -vsync -1 -map_metadata -1 -map_chapters -1
-threads 0 -codec:a:0 ac3 -ac 6 -ab 192000 -y "/tmp/vid.mkv"
ffmpeg
> Hi - it very well might, but I'm not sure how to combine those. Would you be
> willing to give me an example?
There is a buffer parameter for the cue filter, you can just set it a
reasonable number of seconds bigger than your delay introduced by cue. In bash,
you can set something like
> On Feb 12, 2019, at 12:49 AM, Yuntaek Lim wrote:
>
> I've created 5.1 channel aac-lc audio from 5.1 channel ac-3 audio.
> However, the sample entry of "mp4a" box show channel_count as "2", not "6".
> Howerver, the MPEG-4 elementary stream descriptor in "esds" box describes
> channel count
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