[FFmpeg-trac] #348(avcodec:new): Disable cropping for large values

[FFmpeg]

#348: Disable cropping for large values
-------------------------+---------------------
  Reporter:  cehoyos     |      Owner:
      Type:  defect      |     Status:  new
  Priority:  normal      |  Component:  avcodec
   Version:  git-master  |   Keywords:
Blocked By:              |   Blocking:
Reproduced:  1           |   Analyzed:  0
-------------------------+---------------------
 http://thread.gmane.org/gmane.comp.video.ffmpeg.libav.user/6639
 Attached file contains both parts of a 1280x720 3D frame in one 1920x1088
 frame ("Sisvel 3D"). Cropping values are set to produce a 2D 720p frame,
 but current FFmpeg crops a few columns and lines (so an application could
 not recreate the whole 3D frame). Attached patch disables cropping for the
 "brainfart" case.
 {{{
 $ ffmpeg -i sisvel3D.ts
 ffmpeg version N-31438-g6b61920, Copyright (c) 2000-2011 the FFmpeg
 developers
   built on Jul 14 2011 00:39:27 with gcc 4.5.3
   configuration: --cc=/usr/local/gcc-4.5.3/bin/gcc --enable-gpl --enable-
 libopencore-amrnb --enable-version3
   libavutil    51. 11. 0 / 51. 11. 0
   libavcodec   53.  7. 0 / 53.  7. 0
   libavformat  53.  5. 0 / 53.  5. 0
   libavdevice  53.  2. 0 / 53.  2. 0
   libavfilter   2. 25. 0 /  2. 25. 0
   libswscale    2.  0. 0 /  2.  0. 0
   libpostproc  51.  2. 0 / 51.  2. 0
 [h264 @ 0x12d6540] brainfart cropping not supported, this could look
 slightly wrong ...
     Last message repeated 1 times
 [h264 @ 0x12d4420] Estimating duration from bitrate, this may be
 inaccurate

 Seems stream 0 codec frame rate differs from container frame rate: 50.00
 (50/1) -> 25.00 (50/2)
 Input #0, h264, from 'sisvel3D.ts':
   Duration: N/A, bitrate: N/A
     Stream #0.0: Video: h264 (High), yuv420p, 1906x1074, 25 fps, 25 tbr,
 1200k tbn, 50 tbc
 At least one output file must be specified
 }}}
 {{{
 $ ffmpeg -i sisvel3D.ts
 ffmpeg version N-31438-g6b61920, Copyright (c) 2000-2011 the FFmpeg
 developers
   built on Jul 14 2011 00:39:27 with gcc 4.5.3
   configuration: --cc=/usr/local/gcc-4.5.3/bin/gcc --enable-gpl --enable-
 libopencore-amrnb --enable-version3
   libavutil    51. 11. 0 / 51. 11. 0
   libavcodec   53.  7. 0 / 53.  7. 0
   libavformat  53.  5. 0 / 53.  5. 0
   libavdevice  53.  2. 0 / 53.  2. 0
   libavfilter   2. 25. 0 /  2. 25. 0
   libswscale    2.  0. 0 /  2.  0. 0
   libpostproc  51.  2. 0 / 51.  2. 0
 [h264 @ 0x12d6540] brainfart cropping (right: 320, bottom: 184) not
 supported, disabling cropping.
     Last message repeated 1 times
 [h264 @ 0x12d4420] Estimating duration from bitrate, this may be
 inaccurate

 Seems stream 0 codec frame rate differs from container frame rate: 50.00
 (50/1) -> 25.00 (50/2)
 Input #0, h264, from 'sisvel3D.ts':
   Duration: N/A, bitrate: N/A
     Stream #0.0: Video: h264 (High), yuv420p, 1920x1088, 25 fps, 25 tbr,
 1200k tbn, 50 tbc
 At least one output file must be specified
 }}}

-- 
Ticket URL: <https://avcodec.org/trac/ffmpeg/ticket/348>
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