[FFmpeg-trac] #4163(undetermined:closed): Encodes incompatible videos from similar picture and audio files
FFmpeg
trac at avcodec.org
Sun Dec 7 23:39:07 CET 2014
#4163: Encodes incompatible videos from similar picture and audio files
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Reporter: paheikki | Owner:
Type: defect | Status: closed
Priority: normal | Component:
Version: git-master | undetermined
Keywords: mjpeg | Resolution: invalid
aspect | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Changes (by cehoyos):
* keywords: => mjpeg aspect
* status: new => closed
* version: unspecified => git-master
* resolution: => invalid
Comment:
The (main) reason that reporters should provide console output is that
this allows developers to quickly understand an issue without having to
guess. I hope you agree that it is impossible to see anything "quickly" in
the text file you attached.
You originally reported that the issue is reproducible with the two files
showing a temple and a train (both called Kuva.jpg): Why didn't you post
the console output just for these two images?
There is no bug (in FFmpeg) that affects the issue you see afaict: One of
the mjpeg files has no aspect ratio defined (most have) and this is
different from a ratio of 1:1. I am not sure why gpac doesn't ignore the
aspect ratio of the h264 streams but I absolutely may miss something.
Workaround is to specify {{{-vf setsar}}}, I suspect even {{{0}}} is ok if
you don't want to force {{{1}}}.
There may be a slightly related bug: Aspect ratio should never be
{{{100:100}}} but {{{1:1}}} but as said this is unrelated since
{{{100:1000}}} is reduced to {{{1:1}}} before sent to libx264. so this
cannot affect the output files.
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Ticket URL: <https://trac.ffmpeg.org/ticket/4163#comment:9>
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