#6186: Concat demuxer produces invalid output for some h.264 MP4 files
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Reporter: jonmast | Owner:
Type: defect | Status: new
Priority: normal | Component: avformat
Version: git-master | Resolution:
Keywords: concat | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Comment (by jonmast):
Replying to [comment:5 cehoyos]:
> You could reencode this one file with the correct properties.
Right, but I need this to work for any user input. Users upload files
separately and we encode them with Elastic Transcoder (for performance
reasons) and then concatenate them with ffmpeg. I had assumed that Elastic
Transcoder would produce consistent output that could be concatenated
easily, but it appears their output varies somewhat. Encoding to an
intermediate format and then using the concat protocol seems to work fine
for this file, so I'll do more testing with various Elastic Transcoder
outputs and see if it works consistently. If not, I'll probably need to
rework my architecture, but I was hoping that wouldn't be necessary.
Thanks again for your assistance, you've been a great help.
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Ticket URL: <https://trac.ffmpeg.org/ticket/6186#comment:6>
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