#7497: trun.version=1 negative composition time offset is mishandled causing
non-
monotonic packet DTS
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Reporter: pkoshevoy | Owner:
Type: defect | Status: new
Priority: normal | Component: avformat
Version: git-master | Keywords:
Blocked By: | Blocking:
Reproduced by developer: 0 | Analyzed by developer: 0
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Summary of the bug:
demuxing
http://tungsten.aaplimg.com/VOD/bipbop_adv_example_hevc/v16/main.mp4
produces packets with non-monotonically increasing DTS. The file plays
fine in QuickTime X player.
How to reproduce:
{{{
$ wget
http://tungsten.aaplimg.com/VOD/bipbop_adv_example_hevc/v16/main.mp4
$ ffprobe -select_streams v:0 -show_packets main.mp4 | grep
dts_time=10.000
ffprobe version N-92190-gb2adc31697 Copyright (c) 2007-2018 the FFmpeg
developers
built with Apple LLVM version 9.0.0 (clang-900.0.38)
configuration: --prefix=/Users/pkoshevoy/x86_64 --disable-debug
--enable-shared --disable-static --enable-swscale --enable-avfilter
--enable-pthreads --enable-gpl --enable-version3 --enable-postproc
--enable-x86asm --enable-runtime-cpudetect --extra-
cflags='-I/usr/local/include -mmacosx-version-min=10.8' --extra-
ldflags='-headerpad_max_install_names -L/usr/local/lib -mmacosx-version-
min=10.8'
libavutil 56. 19.101 / 56. 19.101
libavcodec 58. 33.100 / 58. 33.100
libavformat 58. 19.100 / 58. 19.100
libavdevice 58. 4.105 / 58. 4.105
libavfilter 7. 33.101 / 7. 33.101
libswscale 5. 2.100 / 5. 2.100
libswresample 3. 2.100 / 3. 2.100
libpostproc 55. 2.100 / 55. 2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'main.mp4':
Metadata:
major_brand : mp42
minor_version : 1
compatible_brands: mp41mp42isomhlsf
creation_time : 2017-06-06T02:40:19.000000Z
Duration: 00:10:08.63, start: 10.016667, bitrate: 3233 kb/s
Stream #0:0(eng): Video: hevc (Main 10) (hvc1 / 0x31637668),
yuv420p10le(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 3229
kb/s, 60 fps, 60 tbr, 6k tbn, 6k tbc (default)
Metadata:
creation_time : 2017-06-06T02:40:19.000000Z
handler_name : Core Media Video
Stream #0:1(eng): Subtitle: eia_608 (c608 / 0x38303663), 0 kb/s
(default)
Metadata:
creation_time : 2017-06-06T02:40:19.000000Z
handler_name : Core Media Closed Caption
dts_time=10.000000
dts_time=10.000000
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7ff90d000000] DTS 60000 < 62900 out of order
dts_time=10.000000
dts_time=10.000000
}}}
This may be related to the issue described in
https://sourceforge.net/p/gpac/bugs/331/
I've had a quick look at libavformat/mov.c and I've noticed that
mov_read_trun ignores version value, and ctts_duration is always unsigned.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/7497>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
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