[FFmpeg-trac] #498(undetermined:new): Invalid pixel aspect ratio encoding mpeg4

[FFmpeg]

#498: Invalid pixel aspect ratio encoding mpeg4
-------------------------------------+-------------------------------------
               Reporter:  cehoyos    |                  Owner:
                   Type:  defect     |                 Status:  new
               Priority:  important  |              Component:
                Version:  git-       |  undetermined
  master                             |               Keywords:  regression
             Blocked By:             |               Blocking:
Reproduced by developer:  1          |  Analyzed by developer:  0
-------------------------------------+-------------------------------------
 Reencoding attached sample fails for some resolutions, this is a
 regression since c8868f28e357e7e6ffe3254d0056b3e8033fe8e5 ("vf_scale:
 apply the same transform to the aspect during init that is applied per
 frame")
 {{{
 $ ffmpeg -i PAR1035.avi -s 640x460 -an out.avi
 ffmpeg version N-32771-g3039c68, Copyright (c) 2000-2011 the FFmpeg
 developers
   built on Sep 22 2011 12:35:59 with gcc 4.5.3
   configuration: --cc=/usr/local/gcc-4.5.3/bin/gcc
   libavutil    51. 16. 1 / 51. 16. 1
   libavcodec   53. 16. 0 / 53. 16. 0
   libavformat  53. 12. 0 / 53. 12. 0
   libavdevice  53.  4. 0 / 53.  4. 0
   libavfilter   2. 43. 2 /  2. 43. 2
   libswscale    2.  1. 0 /  2.  1. 0

 Seems stream 0 codec frame rate differs from container frame rate:
 30000.00 (30000/1) -> 29.97 (30000/1001)
 Input #0, avi, from 'PAR1035.avi':
   Metadata:
     encoder         : Lavf53.4.0
   Duration: 00:04:57.16, start: 0.000000, bitrate: 28 kb/s
     Stream #0.0: Video: mpeg4 (Simple Profile) (DX50 / 0x30355844),
 yuv420p, 720x406 [SAR 1:1 DAR 360:203], 29.97 fps, 29.97 tbr, 29.97 tbn,
 30k tbc
     Stream #0.1: Audio: mp3 (U[0][0][0] / 0x0055), 48000 Hz, stereo, s16,
 192 kb/s
 [buffer @ 0x12ea7c0] w:720 h:406 pixfmt:yuv420p tb:1/1000000 sar:1/1
 sws_param:
 [scale @ 0x12cb580] w:720 h:406 fmt:yuv420p -> w:640 h:460 fmt:yuv420p
 flags:0x4
 [mpeg4 @ 0x12c76e0] Invalid pixel aspect ratio 1035/812, limit is 255/255
 Output #0, avi, to 'out.avi':
   Metadata:
     encoder         : Lavf53.4.0
     Stream #0.0: Video: mpeg4, yuv420p, 640x460 [SAR 1035:812 DAR
 360:203], q=2-31, 200 kb/s, 90k tbn, 29.97 tbc
 Stream mapping:
   Stream #0.0 -> #0.0 (mpeg4 -> mpeg4)
 Error while opening encoder for output stream #0.0 - maybe incorrect
 parameters such as bit_rate, rate, width or height
 }}}

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Ticket URL: <https://avcodec.org/trac/ffmpeg/ticket/498>
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