[FFmpeg-trac] #2312(FFmpeg:new): AVI (Matrox-compatible) file doubling up in size

FFmpeg trac at avcodec.org
Thu Feb 28 18:40:35 CET 2013


#2312: AVI (Matrox-compatible) file doubling up in size
--------------------------------+-------------------------------------
             Reporter:  wleo75  |                     Type:  defect
               Status:  new     |                 Priority:  important
            Component:  FFmpeg  |                  Version:
             Keywords:          |               Blocked By:
             Blocking:          |  Reproduced by developer:  0
Analyzed by developer:  0       |
--------------------------------+-------------------------------------
 Summary of the bug:
 How to reproduce:
 {{{
 % ffmpeg -y -i samplein.mxf -f avi -vcodec dvvideo -an -vf
 crop=720:480:0:32 sampleout.avi

 ffmpeg version N-49069-gc74d465
 built on Jan 20 2013 23:39:19 with gcc 4.7.2 (GCC)
 configuration: --enable-gpl --enable-version3 --disable-w32threads
 --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r
 --enable-gnutls --enable-libass --enable-libbluray --enable-libcaca
 --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-
 libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
 --enable-libopus --enable-librtmp --enable-libschroedinger --enable-
 libspeex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc
 --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-
 libx264 --enable-libxavs --enable-libxvid --enable-zlib --enable-
 filter=frei0r
 libavutil      52. 15.100 / 52. 15.100
 libavcodec     54. 89.100 / 54. 89.100
 libavformat    54. 61.101 / 54. 61.101
 libavdevice    54.  3.102 / 54.  3.102
 libavfilter     3. 32.101 /  3. 32.101
 libswscale      2.  2.100 /  2.  2.100
 libswresample   0. 17.102 /  0. 17.102
 libpostproc    52.  2.100 / 52.  2.100
 }}}

 The AVi generated ends up with 2X the file size. Mediainfo reports the
 bitrate as 24.4 Mbps (exactly the same as any other Matrox AVI file);
 however, if you consider the file size, the overall bitrate is 57.6 Mbps.
 Sometimes, there are also issues playing out the output files.

 Source file:
 https://s3.amazonaws.com/vid-share-3/samplein.mxf

 Output:
 https://s3.amazonaws.com/vid-share-3/sampleout.avi

 The same thing happens when tested on Linux.

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2312>
FFmpeg <http://ffmpeg.org>
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