[FFmpeg-trac] #1997(avformat:open): setdar/setsar on muxing to mkv can produce files with wrong aspect ratio on 32 bit (was: setdar/setsar on webm transcoding produces files with wrong aspect ratio on Ubuntu 12.04 32 bit)

[FFmpeg]

#1997: setdar/setsar on muxing to mkv can produce files with wrong aspect ratio on
32 bit
------------------------------------+------------------------------------
             Reporter:  kahphi      |                    Owner:
                 Type:  defect      |                   Status:  open
             Priority:  minor       |                Component:  avformat
              Version:  git-master  |               Resolution:
             Keywords:  mkv         |               Blocked By:
             Blocking:              |  Reproduced by developer:  1
Analyzed by developer:  1           |
------------------------------------+------------------------------------
Changes (by cehoyos):

 * status:  new => open
 * reproduced:  0 => 1
 * component:  undetermined => avformat
 * version:  1.0 => git-master
 * analyzed:  0 => 1


Comment:

 Reproducible without external libraries:
 {{{
 $ ./ffmpeg -i tests/lena.pnm -s 720x576 -vf setdar=5:4 -vcodec flv1
 out.mkv
 $ ./ffmpeg -i out.mkv -vf setdar=4:3 -vcodec flv1 out2.mkv
 }}}
 If ffmpeg was compiled with -m64, the resulting file out2.mkv has
 MATROSKA_ID_VIDEODISPLAYWIDTH set to 768 and DAR is 4:3. If ffmpeg was
 compiled with -m32, out2.mkv has MATROSKA_ID_VIDEODISPLAYWIDTH set to 767
 (and DAR is 265:199) because d_width in mkv_write_tracks() is calculated
 as 767.
 {{{
 $ ./ffmpeg -i out.mkv -vf setdar=4:3 -vcodec flv1 out32.mkv
 ffmpeg version N-47576-g6777aa6 Copyright (c) 2000-2012 the FFmpeg
 developers
   built on Dec  7 2012 16:37:06 with gcc 4.7 (SUSE Linux)
   configuration: --cc='cc -m32'
   libavutil      52. 11.102 / 52. 11.102
   libavcodec     54. 79.100 / 54. 79.100
   libavformat    54. 47.100 / 54. 47.100
   libavdevice    54.  3.102 / 54.  3.102
   libavfilter     3. 25.101 /  3. 25.101
   libswscale      2.  1.103 /  2.  1.103
   libswresample   0. 17.102 /  0. 17.102
 Input #0, matroska,webm, from 'out.mkv':
   Metadata:
     ENCODER         : Lavf54.47.100
   Duration: 00:00:00.04, start: 0.000000, bitrate: 6428 kb/s
     Stream #0:0: Video: flv1 (FLV1 / 0x31564C46), yuv420p, 720x576, SAR
 1:1 DAR 5:4, 25 fps, 25 tbr, 1k tbn, 1k tbc (default)
 [Parsed_setdar_0 @ 0x93a11e0] num:den syntax is deprecated, please use
 num/den or named options instead
 Output #0, matroska, to 'out32.mkv':
   Metadata:
     encoder         : Lavf54.47.100
     Stream #0:0: Video: flv1 (FLV1 / 0x31564C46), yuv420p, 720x576 [SAR
 16:15 DAR 4:3], q=2-31, 200 kb/s, 1k tbn, 25 tbc (default)
 Stream mapping:
   Stream #0:0 -> #0:0 (flv -> flv)
 Press [q] to stop, [?] for help
 frame=    1 fps=0.0 q=5.0 Lsize=      31kB time=00:00:00.04
 bitrate=6429.2kbits/s
 video:31kB audio:0kB subtitle:0 global headers:0kB muxing overhead
 1.963396%
 }}}
 {{{
 $ ./ffmpeg -i out.mkv -vf setdar=4:3 -vcodec flv1 out64.mkv
 ffmpeg version N-47576-g6777aa6 Copyright (c) 2000-2012 the FFmpeg
 developers
   built on Dec  7 2012 16:38:57 with gcc 4.7 (SUSE Linux)
   configuration: --cc='cc -m64'
   libavutil      52. 11.102 / 52. 11.102
   libavcodec     54. 79.100 / 54. 79.100
   libavformat    54. 47.100 / 54. 47.100
   libavdevice    54.  3.102 / 54.  3.102
   libavfilter     3. 25.101 /  3. 25.101
   libswscale      2.  1.103 /  2.  1.103
   libswresample   0. 17.102 /  0. 17.102
 Input #0, matroska,webm, from 'out.mkv':
   Metadata:
     ENCODER         : Lavf54.47.100
   Duration: 00:00:00.04, start: 0.000000, bitrate: 6428 kb/s
     Stream #0:0: Video: flv1 (FLV1 / 0x31564C46), yuv420p, 720x576, SAR
 1:1 DAR 5:4, 25 fps, 25 tbr, 1k tbn, 1k tbc (default)
 [Parsed_setdar_0 @ 0x2584980] num:den syntax is deprecated, please use
 num/den or named options instead
 Output #0, matroska, to 'out64.mkv':
   Metadata:
     encoder         : Lavf54.47.100
     Stream #0:0: Video: flv1 (FLV1 / 0x31564C46), yuv420p, 720x576 [SAR
 16:15 DAR 4:3], q=2-31, 200 kb/s, 1k tbn, 25 tbc (default)
 Stream mapping:
   Stream #0:0 -> #0:0 (flv -> flv)
 Press [q] to stop, [?] for help
 frame=    1 fps=0.0 q=5.0 Lsize=      31kB time=00:00:00.04
 bitrate=6429.2kbits/s
 video:31kB audio:0kB subtitle:0 global headers:0kB muxing overhead
 1.963396%
 }}}
 {{{
 $ ffmpeg -i out32.mkv -i out64.mkv
 ffmpeg version N-47576-g6777aa6 Copyright (c) 2000-2012 the FFmpeg
 developers
   built on Dec  7 2012 16:40:58 with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl --disable-indev=jack
   libavutil      52. 11.102 / 52. 11.102
   libavcodec     54. 79.100 / 54. 79.100
   libavformat    54. 47.100 / 54. 47.100
   libavdevice    54.  3.102 / 54.  3.102
   libavfilter     3. 25.101 /  3. 25.101
   libswscale      2.  1.103 /  2.  1.103
   libswresample   0. 17.102 /  0. 17.102
   libpostproc    52.  2.100 / 52.  2.100
 Input #0, matroska,webm, from 'out32.mkv':
   Metadata:
     ENCODER         : Lavf54.47.100
   Duration: 00:00:00.04, start: 0.000000, bitrate: 6429 kb/s
     Stream #0:0: Video: flv1 (FLV1 / 0x31564C46), yuv420p, 720x576, SAR
 212:199 DAR 265:199, 25 fps, 25 tbr, 1k tbn, 1k tbc (default)
 Input #1, matroska,webm, from 'out64.mkv':
   Metadata:
     ENCODER         : Lavf54.47.100
   Duration: 00:00:00.04, start: 0.000000, bitrate: 6429 kb/s
     Stream #1:0: Video: flv1 (FLV1 / 0x31564C46), yuv420p, 720x576, SAR
 16:15 DAR 4:3, 25 fps, 25 tbr, 1k tbn, 1k tbc (default)
 At least one output file must be specified
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1997#comment:4>
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