[FFmpeg-trac] #9569(avformat:new): spdif: Unusual frame timing
FFmpeg
trac at avcodec.org
Sun Dec 26 14:45:06 EET 2021
#9569: spdif: Unusual frame timing
-----------------------------------+--------------------------------------
Reporter: Mitzsch01 | Type: defect
Status: new | Priority: normal
Component: avformat | Version: git-master
Keywords: spdif | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-----------------------------------+--------------------------------------
'''Summary of the bug:'''
When playing back a file containing a Dolby TrueHD track with passthrough
enabled and you skip forward or backward audio is lost. (I tried it with
mpv) In the console, it shows the following message:
{{{
[ffmpeg] spdif: Unusual frame timing: 40872 => 18920, 40 samples/frame is
not implemented. Update your FFmpeg version to the newest one from Git. If
the problem still occurs, it means that your file has a feature that has
not been implemented.
[ffmpeg] spdif: If you want to help, upload a sample of this file to
https://streams.videolan.org/upload/ and contact the ffmpeg-devel mailing
list. (ffmpeg-devel at ffmpeg.org)
}}}
It also occurs when you play a file that comes from a master and needed
seamless branching. Whenever it hits the sequence that was merged, audio
is lost and it shows the same message above.
This behavior is present after the commits for this issue
https://trac.ffmpeg.org/ticket/7731 were merged. The implementation before
that worked fine in this regard.
'''How to reproduce:'''
Play any TrueHD file with passthrough enabled and skip forward or backward
in the file. In most cases, the audio will be lost and you see the message
''spdif: Unusual frame timing:''. You may recover from this by skipping
further.
{{{
mpv 0.34.0-116-gd92cf77be5 Copyright © 2000-2021 mpv/MPlayer/mplayer2
projects
built on Sat Dec 25 17:26:05 CET 2021
FFmpeg library versions:
libavutil 57.13.100
libavcodec 59.15.101
libavformat 59.10.100
libswscale 6.1.102
libavfilter 8.21.100
libswresample 4.0.100
FFmpeg version: N-105030-g0c8741f819
}}}
'''Samples:'''
https://kodi.wiki/view/Samples
--
Ticket URL: <https://trac.ffmpeg.org/ticket/9569>
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