[FFmpeg-trac] #3447(undetermined:new): YV12 and I420 and IYUV all map to YUV420P

[FFmpeg]

#3447: YV12 and I420 and IYUV all map to YUV420P
-------------------------------------+-------------------------------------
             Reporter:  DonMoir      |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 As far as I can tell, I420 and IYUV reverses the U and V planes from YV12
 and there doesn't seem to be a mapping for YV12 other than YUV420p or vice
 versa whatever the case may be I think they are supposed to be reversed.

 I have a software DirectShow screen capture device MediaLooks. It has both
 I420 and YV12 formats and some others. YV12 is listed before I420 and
 since they both map to YUV420P seems it's confused and the colors are
 reversed.

 See: http://www.fourcc.org/yuv.php#YV12

 first few pixel formats in map in libavcodec/raw.c


 {{{
 const PixelFormatTag ff_raw_pix_fmt_tags[] = {
      { AV_PIX_FMT_YUV420P, MKTAG('I', '4', '2', '0') }, /* Planar formats
 */
      { AV_PIX_FMT_YUV420P, MKTAG('I', 'Y', 'U', 'V') },
      { AV_PIX_FMT_YUV420P, MKTAG('Y', 'V', '1', '2') },
      { AV_PIX_FMT_YUV410P, MKTAG('Y', 'U', 'V', '9') },
      { AV_PIX_FMT_YUV410P, MKTAG('Y', 'V', 'U', '9') },
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/3447>
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