[FFmpeg-trac] #9897(undetermined:new): Discrepancies in video clips created from MP4 file based on Start second and duration in secs between ffmpeg command in windows and Ubuntu.

[FFmpeg]

#9897: Discrepancies in video clips created from MP4 file based on Start second
and duration in secs between ffmpeg command in windows and Ubuntu.
-------------------------------------+-------------------------------------
             Reporter:  Prem         |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug: Discrepancies in video clips created from MP4 file
 based on Start second and duration in secs between ffmpeg command in
 windows and Ubuntu. The clip created on windows seems to be accurate but
 one created on ubuntu has extra secs. (Both uses fast seeking)

 How to reproduce:

 On windows
 ---------
 ffmpeg.exe -y -ss 20.0 -i 14c64d99-8315-4b00-af18-0dd80a4b87d8.MP4 -t 20.0
 -f MP4 -c:v copy -c:a copy testwin.MP4  => this produces 20 secs clip

 On Linux
 ------
 ffmpeg -y -ss 20.0 -i 14c64d99-8315-4b00-af18-0dd80a4b87d8.MP4 -t 20.0 -f
 MP4 -c:v copy -c:a copy testlinux.MP4  => this produces 23 secs clip

 ffmpeg windows version
 -----------------------
 ffmpeg version N-103591-geeab62ad2d Copyright (c) 2000-2021 the FFmpeg
 developers
   built with gcc 7.3-win32 (GCC) 20180312
   configuration: prefix=./production --cross-prefix=x86_64-w64-mingw32-
 --target-os=mingw64 --arch=x86_64 --enable-static --enable-libfreetype
 --enable-libx264 --enable-libopus
   libavutil      57.  5.100 / 57.  5.100
   libavcodec     59.  7.103 / 59.  7.103
   libavformat    59.  5.100 / 59.  5.100
   libavdevice    59.  0.101 / 59.  0.101
   libavfilter     8.  9.100 /  8.  9.100
   libswscale      6.  1.100 /  6.  1.100
   libswresample   4.  0.100 /  4.  0.100


 ffmpeg linux version
 -----------------------
 ffmpeg version 4.2.7-0ubuntu0.1 Copyright (c) 2000-2022 the FFmpeg
 developers
 built with gcc 9 (Ubuntu 9.4.0-1ubuntu1~20.04.1)
 configuration: --prefix=/usr --extra-version=0ubuntu0.1
 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu
 --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl
 --disable-stripping --enable-avresample --disable-filter=resample
 --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom
 --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca
 --enable-libcdio --enable-libcodec2 --enable-libflite --enable-
 libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme
 --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa
 --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-
 libpulse --enable-librsvg --enable-librubberband --enable-libshine
 --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh
 --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-
 libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-
 libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi
 --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl
 --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883
 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264
 --enable-shared
 libavutil      56. 31.100 / 56. 31.100
 libavcodec     58. 54.100 / 58. 54.100
 libavformat    58. 29.100 / 58. 29.100
 libavdevice    58.  8.100 / 58.  8.100
 libavfilter     7. 57.100 /  7. 57.100
 libavresample   4.  0.  0 /  4.  0.  0
 libswscale      5.  5.100 /  5.  5.100
 libswresample   3.  5.100 /  3.  5.100
 libpostproc    55.  5.100 / 55.  5.100
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/9897>
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