Opened 4 months ago

Last modified 2 months ago

#11029 new defect

Video of damaged MP4 freezes for half a second during playback

Reported by: PumaD Owned by:
Priority: normal Component: undetermined
Version: git-master Keywords:
Cc: PumaD, MasterQuestionable Blocked By:
Blocking: Reproduced by developer: no
Analyzed by developer: no

Description (last modified by PumaD)

Follow-up to #11005

Got a slightly damaged 1.9 GiB MP4 file. When playing with ffplay (or any ffmpeg based player like mpv) the video freezes for about half a second at 00:42:58.

Remuxing the file with mkvtoolnix resolves this problem.
(​https://gitlab.com/mbunkus/mkvtoolnix; mkvmerge --output out.mkv slightly-damaged-audio-stops-at-00-43-05.mp4)

Remuxing with ffmpeg instead does not.
(ffmpeg -i slightly-damaged-audio-stops-at-00-43-05.mp4 -c copy out.mkv)

Sample (from #11028):
https://streams.videolan.org/ffmpeg/incoming/11028/slightly-damaged-audio-stops-at-00-43-05.mp4 (~ 1 GiB)

Note: NSFW

How to reproduce:

$ ./ffplay -ss 00:42:55 slightly-damaged-audio-stops-at-00-43-05.mp4 
ffplay version N-115363-g3146b77a7d Copyright (c) 2003-2024 the FFmpeg developers
  built with gcc 14.1.1 (GCC) 20240507
  configuration: 
  libavutil      59. 19.100 / 59. 19.100
  libavcodec     61.  5.104 / 61.  5.104
  libavformat    61.  3.103 / 61.  3.103
  libavdevice    61.  2.100 / 61.  2.100
  libavfilter    10.  2.102 / 10.  2.102
  libswscale      8.  2.100 /  8.  2.100
  libswresample   5.  2.100 /  5.  2.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fb1bc000c80] Sample size 3043950162 is too large
[h264 @ 0x7fb1bc001c00] concealing 1691 DC, 1691 AC, 1691 MV errors in I frame
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'slightly-damaged-audio-stops-at-00-43-05.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf57.62.100
  Duration: 01:28:36.03, start: 0.000000, bitrate: 1577 kb/s
  Stream #0:0[0x1](und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(progressive), 960x720 [SAR 1:1 DAR 4:3], 3028 kb/s, 29.93 fps, 30 tbr, 90k tbn (default)
      Metadata:
        handler_name    : VideoHandler
        vendor_id       : [0][0][0][0]
  Stream #0:1[0x2](und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 93 kb/s (default)
      Metadata:
        handler_name    : SoundHandler
        vendor_id       : [0][0][0][0]
Truncating packet of size 268435713 to 35501233KB sq=    0B 
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fb1bc000c80] Packet corrupt (stream = 1, dts = 113707010).
[aac @ 0x7fb1bc008240] channel element 2.0 is not allocated 
[aac @ 0x7fb1bc008240] channel element 2.0 is not allocated 
[aac @ 0x7fb1bc008240] Sample rate index in program config element does not match the sample rate index configured by the container.
[aac @ 0x7fb1bc008240] channel element 3.1 is not allocated
[h264 @ 0x7fb1bc5c8700] concealing 1127 DC, 1127 AC, 1127 MV errors in P frame
2584.75 A-V: -0.017 fd=   7 aq=    1KB vq=15359KB sq=    0B

Change History (2)

comment:1 by PumaD, 4 months ago

Description: modified (diff)

comment:2 by MasterQuestionable, 2 months ago

Cc: MasterQuestionable added
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