ffmpeg cannot convert videos created with Virtual Box

[Ilya Basin]

I've captured a .webm video with vbox. It plays fine and I'm trying to convert it to .avi. But ffmpeg prints a warning and produces a video containing just one frame.

ffmpeg -i win2003-wc-2014-01-21T08-50-31-513188200Z.webm win2003-wc-2014-01-21T08-50-31-513188200Z.avi
ffmpeg version 2.1.3 Copyright (c) 2000-2013 the FFmpeg developers
  built on Jan 15 2014 20:51:13 with gcc 4.8.2 (GCC) 20131219 (prerelease)
  configuration: --prefix=/usr --disable-debug --disable-static --enable-avresample --enable-dxva2 --enable-fontconfig --enable-gnutls --enable-gpl --enable-libass --enable-libbluray --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libv4l2 --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxvid --enable-pic --enable-postproc --enable-runtime-cpudetect --enable-shared --enable-swresample --enable-vdpau --enable-version3 --enable-x11grab
  libavutil      52. 48.101 / 52. 48.101
  libavcodec     55. 39.101 / 55. 39.101
  libavformat    55. 19.104 / 55. 19.104
  libavdevice    55.  5.100 / 55.  5.100
  libavfilter     3. 90.100 /  3. 90.100
  libavresample   1.  1.  0 /  1.  1.  0
  libswscale      2.  5.101 /  2.  5.101
  libswresample   0. 17.104 /  0. 17.104
  libpostproc    52.  3.100 / 52.  3.100
Input #0, matroska,webm, from 'win2003-wc-2014-01-21T08-50-31-513188200Z.webm':
  Duration: 20:53:05.71, start: 0.000000, bitrate: 2 kb/s
    Stream #0:0(eng): Video: vp8, yuv420p, 1024x768, SAR 1:1 DAR 4:3, 30 fps, 30 tbr, 1k tbn, 1k tbc (default)
File 'win2003-wc-2014-01-21T08-50-31-513188200Z.avi' already exists. Overwrite ? [y/N] y
Output #0, avi, to 'win2003-wc-2014-01-21T08-50-31-513188200Z.avi':
  Metadata:
    ISFT            : Lavf55.19.104
    Stream #0:0(eng): Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 1024x768 [SAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 30 tbn, 30 tbc (default)
Stream mapping:
  Stream #0:0 -> #0:0 (vp8 -> mpeg4)
Press [q] to stop, [?] for help
[avi @ 0x1cefa20] Too large number of skipped frames 2244170 > 60000
av_interleaved_write_frame(): Invalid argument

[Ilya Basin]

sample

[Carl Eugen Hoyos]

Is the problem reproducible with current FFmpeg git head?

[Ilya Basin]

no, sorry.

[Carl Eugen Hoyos]

Needs a backport of 251c96a7

[Carl Eugen Hoyos]

Will be fixed in FFmpeg 2.1.4, thank you for the report!