[FFmpeg-trac] #6263(undetermined:new): MPEG TS: A/V async issue when remuxing. Plays fine in MPV

[FFmpeg]

#6263: MPEG TS: A/V async issue when remuxing. Plays fine in MPV
-------------------------------------+-------------------------------------
             Reporter:  peter_b      |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:  mpegts       |               Blocked By:
  async vsync                        |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:

 I have off-the-air recordings: H.264/AAC in an MPEG-TS (.ts) file.
 For archiving, I uncompress the audio to pcm_s16le, and the container to
 MKV.

 I have a file where audio/video goes completely out of sync after a
 certain position in the video.
 I've isolated the culprit part of the video using "dd".

 I've tried the following commands:
 {{{
 $FFMPEG -i $IN -c copy ${OUT}-copy.ts
 $FFMPEG -i $IN -c copy -vsync passthrough ${OUT}-vsync_pass.ts
 $FFMPEG -i $IN -c copy -vsync cfr ${OUT}-vsync_cfr.ts
 $FFMPEG -i $IN -c copy -vsync vfr ${OUT}-vsync_vfr.ts
 $FFMPEG -i $IN -c copy -vsync drop ${OUT}-vsync_drop.ts

 $FFMPEG -i $IN -c:v copy -c:a pcm_s16le ${OUT}-pcm_s16le.ts
 $FFMPEG -i $IN -c:v copy -c:a pcm_s16le -af "aresample=async=1000"
 ${OUT}-aresample.mkv
 }}}

 None of them produce a clean output :(

 The commercial clip starting at offset 26s seems to be defect.
 The file plays fine in [http://mpv.io/ MPV Media Player], so I guess there
 must be a way to fix the timestamps somehow?


 Here's the complete, uncut (*) console output from the first of the above
 commands I've tried:
 {{{
 $ ffmpeg -i nd_vs_v-cut2.ts -c copy out.ts
 }}}

 (*) I've removed a long number of repeating "decode_slice_header error"
 messages, since they were identical to the first one.


 {{{
 ffmpeg version N-84661-g66c1c9b Copyright (c) 2000-2017 the FFmpeg
 developers
   built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
   configuration: --prefix=/usr/local --enable-gpl --enable-nonfree
 --enable-version3 --enable-postproc --enable-swscale --enable-avfilter
 --enable-pthreads --enable-bzlib --enable-zlib --enable-decoder=png
 --enable-encoder=png --samples=../fate-suite --enable-libfreetype
 --enable-libschroedinger --enable-libopenjpeg --disable-decoder=jpeg2000
 --enable-libvpx --enable-libvorbis --enable-libx264
   libavutil      55. 51.100 / 55. 51.100
   libavcodec     57. 86.103 / 57. 86.103
   libavformat    57. 67.100 / 57. 67.100
   libavdevice    57.  3.101 / 57.  3.101
   libavfilter     6. 78.100 /  6. 78.100
   libswscale      4.  3.101 /  4.  3.101
   libswresample   2.  4.100 /  2.  4.100
   libpostproc    54.  2.100 / 54.  2.100
 [h264 @ 0x3f6e040] non-existing PPS 0 referenced
     Last message repeated 1 times
 [h264 @ 0x3f6e040] decode_slice_header error
 [h264 @ 0x3f6e040] no frame!
 [h264 @ 0x3f6e040] non-existing PPS 0 referenced
     Last message repeated 1 times
 [h264 @ 0x3f6e040] decode_slice_header error
 [h264 @ 0x3f6e040] no frame!
 [h264 @ 0x3f6e040] non-existing PPS 0 referenced
 ...
 ...
 ...
 Input #0, mpegts, from 'nd_vs_v-cut2.ts':
   Duration: 00:03:18.03, start: 434.773333, bitrate: 1440 kb/s
   Program 1
     Stream #0:0[0x101]: Audio: aac (HE-AAC) ([15][0][0][0] / 0x000F),
 48000 Hz, stereo, fltp, 59 kb/s
     Stream #0:1[0x102]: Video: h264 (High) ([27][0][0][0] / 0x001B),
 yuv420p(progressive), 1280x720, 30 fps, 29.97 tbr, 90k tbn, 60 tbc
     Stream #0:2[0x103]: Data: timed_id3 (ID3  / 0x20334449)
 Output #0, mpegts, to 'out/out.ts':
   Metadata:
     encoder         : Lavf57.67.100
     Stream #0:0: Video: h264 (High) ([27][0][0][0] / 0x001B),
 yuv420p(progressive), 1280x720, q=2-31, 30 fps, 29.97 tbr, 90k tbn, 90k
 tbc
     Stream #0:1: Audio: aac (HE-AAC) ([15][0][0][0] / 0x000F), 48000 Hz,
 stereo, fltp, 59 kb/s
 Stream mapping:
   Stream #0:1 -> #0:0 (copy)
   Stream #0:0 -> #0:1 (copy)
 Press [q] to stop, [?] for help
 [mpegts @ 0x3f68360] DTS 8589934592 < 8590832488 out of
 orderitrate=4346.8kbits/s speed=30.8x
 [mpegts @ 0x3f68360] DTS 55209870 < 8592634286 out of order9
 bitrate=2633.7kbits/s speed=46.9x
 frame= 2589 fps=1058 q=-1.0 Lsize=   35793kB time=00:01:37.25
 bitrate=3014.9kbits/s speed=39.7x
 video:32062kB audio:838kB subtitle:0kB other streams:0kB global
 headers:0kB muxing overhead: 8.791791%
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/6263>
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