[FFmpeg-user] Remux to matroska an h264 track without timestamps

[Gabriele Greco]

I have some input TS with H264 payload that do not have timestamps
correctly set in the video streams (or at least ffmpeg complains about it),
this cause no problem if I extract the video track as ts:

ffmpeg -i input.ts -c copy -an test.ts

completes with the warning:
[mpegts @ 0x7f87d2021a00] Timestamps are unset in a packet for stream 0.
This is deprecated and will stop working in the future. Fix your code to
set the timestamps properly

... but the previous warning became an error if I try to remux it in
matroska:

ffmpeg -i input.ts -c copy -an test.mkv

[matroska @ 0x7ff323897e00] Timestamps are unset in a packet for stream 0.
This is deprecated and will stop working in the future. Fix your code to
set the timestamps properly
[matroska @ 0x7ff323897e00] Can't write packet with unknown timestamp

I tried to force ffmpeg to generate pts for this file:

ffmpeg -fflags +genpts -i input.ts -c copy -an test.mkv

without any luck...

The only workaround I found at the moment is to do a double remux:

ffmpeg -i input.ts -c copy -an input.mp4
ffmpeg -i input.mp4 -c copy input.mkv

... but this is a big problem with large files (often we receive 20GB +
video files) and I cannot use mp4 as container for the video track since it
doesn't support a lot of video codecs...

Here is a link to a sample file (as small as I could make it, but it's
still 8MB):

https://www.dropbox.com/s/1o75ibqdz6fi9ul/test.ts?dl=0

-- 
*Bye,*
* Gabry*

-- 


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