[FFmpeg-trac] #3750(undetermined:new): Transcoding to mpeg2video when scaling produces incorrect aspect ratio with WMP

[FFmpeg]

#3750: Transcoding to mpeg2video when scaling produces incorrect aspect ratio with
WMP
-------------------------------------+-------------------------------------
               Reporter:  cehoyos    |                  Owner:
                   Type:  defect     |                 Status:  new
               Priority:  important  |              Component:
                Version:  git-       |  undetermined
  master                             |               Keywords:  regression
             Blocked By:             |               Blocking:
Reproduced by developer:  0          |  Analyzed by developer:  0
-------------------------------------+-------------------------------------
 http://thread.gmane.org/gmane.comp.video.ffmpeg.user/52608

 A user provided a sample that is played in 16:9 by ffplay (and vlc and
 MPlayer).
 When transcoded with the following command line, the output file is played
 in 2.37:1 by WMP since 66f4891 if the scaler was used.
 {{{
 $ ffmpeg -i FVP241-4sec_cut.mov -vf scale=1920x1080 -qscale 2 -mbd 2 -t
 0.83 out.ts
 ffmpeg version N-64325-g9efa7f8 Copyright (c) 2000-2014 the FFmpeg
 developers
   built on Jun 30 2014 22:23:02 with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl
   libavutil      52. 90.101 / 52. 90.101
   libavcodec     55. 68.100 / 55. 68.100
   libavformat    55. 44.100 / 55. 44.100
   libavdevice    55. 13.101 / 55. 13.101
   libavfilter     4.  9.100 /  4.  9.100
   libswscale      2.  6.100 /  2.  6.100
   libswresample   0. 19.100 /  0. 19.100
   libpostproc    52.  3.100 / 52.  3.100
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'FVP241-4sec_cut.mov':
   Metadata:
     major_brand     : qt
     minor_version   : 512
     compatible_brands: qt
     encoder         : Lavf55.44.100
   Duration: 00:00:04.04, start: 0.000000, bitrate: 5071 kb/s
     Stream #0:0(eng): Video: mpeg2video (Main) (hdv2 / 0x32766468),
 yuv420p(tv, bt709), 1440x1080 [SAR 4:3 DAR 16:9], 23992 kb/s, 29.97 fps,
 29.97 tbr, 11988 tbn, 59.94 tbc (default)
     Metadata:
       handler_name    : DataHandler
       encoder         : HDV 1080i60
       timecode        : 01:00:00;00
     Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz,
 stereo, s16, 1536 kb/s (default)
     Metadata:
       handler_name    : DataHandler
     Stream #0:2(eng): Data: none (tmcd / 0x64636D74), 0 kb/s
     Metadata:
       handler_name    : DataHandler
       timecode        : 01:00:00;00
 Please use -q:a or -q:v, -qscale is ambiguous
 [mpegts @ 0x3086f00] Using AVStream.codec.time_base as a timebase hint to
 the muxer is deprecated. Set AVStream.time_base instead.
     Last message repeated 1 times
 Output #0, mpegts, to 'out.ts':
   Metadata:
     major_brand     : qt
     minor_version   : 512
     compatible_brands: qt
     encoder         : Lavf55.44.100
     Stream #0:0(eng): Video: mpeg2video, yuv420p, 1920x1080 [SAR 1:1 DAR
 16:9], q=2-31, 200 kb/s, 29.97 fps, 90k tbn, 29.97 tbc (default)
     Metadata:
       handler_name    : DataHandler
       timecode        : 01:00:00;00
       encoder         : Lavc55.68.100 mpeg2video
     Stream #0:1(eng): Audio: mp2, 48000 Hz, stereo, s16, 384 kb/s
 (default)
     Metadata:
       handler_name    : DataHandler
       encoder         : Lavc55.68.100 mp2
 Stream mapping:
   Stream #0:0 -> #0:0 (mpeg2video (native) -> mpeg2video (native))
   Stream #0:1 -> #0:1 (pcm_s16le (native) -> mp2 (native))
 Press [q] to stop, [?] for help
 frame=   25 fps=0.0 q=2.0 Lsize=    2266kB time=00:00:00.82
 bitrate=22363.1kbits/s
 video:2057kB audio:39kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 8.081009%
 }}}
 The output file plays correctly with WMP if no scaling gets applied.

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Ticket URL: <https://trac.ffmpeg.org/ticket/3750>
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