#235 melt mxf file continues audio + freezes video when moving back

[qubodup]

Using sample mxf files at http://hamburgpromedia.com/Testfiles/MXF_MPEG_Testfiles.php (you can enter a fake email address for download, it's not used), playback of these files is incorrect in melt. If you press 'g', the video will freeze until you reach the frame at which it froze originally while the audio will keep playing.

Video of the bug (mlt-git): https://youtu.be/gMSHZQrKMro

Video of a previous version of the bug causing issues in Kdenlive (mlt-0.9.8-3): https://youtu.be/f9DiYrkftVk

This issue was spotted while trying to help with a kdenlive issue report https://forum.kde.org/viewtopic.php?f=265&t=128434

$ ffmpeg
ffmpeg version 2.8.3 Copyright (c) 2000-2015 the FFmpeg developers
  built with gcc 5.2.0 (GCC)
  configuration: --prefix=/usr --disable-debug --disable-static --disable-stripping --enable-avisynth --enable-avresample --enable-fontconfig --enable-gnutls --enable-gpl --enable-ladspa --enable-libass --enable-libbluray --enable-libdcadec --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libv4l2 --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-shared --enable-version3 --enable-x11grab
  libavutil      54. 31.100 / 54. 31.100
  libavcodec     56. 60.100 / 56. 60.100
  libavformat    56. 40.101 / 56. 40.101
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5. 40.101 /  5. 40.101
  libavresample   2.  1.  0 /  2.  1.  0
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  2.101 /  1.  2.101
  libpostproc    53.  3.100 / 53.  3.100

Please let me know if I should provide more info.

[Dan Dennedy]

This is a bug in FFmpeg libavformat:
https://trac.ffmpeg.org/ticket/5017
FFmpeg v2.7 does not have this problem.