Support new utvideo 10bit

[Carl Eugen Hoyos]

Current FFmpeg does not support utvideo's new fourcc UQY2.

$ ffmpeg -i utvideo-yuv422p10le_UQY2_crc32-A431CD5F.avi
ffmpeg version N-67022-g69071e8 Copyright (c) 2000-2014 the FFmpeg developers
  built on Oct 19 2014 14:53:44 with gcc 4.7 (SUSE Linux)
  configuration: --enable-gpl
  libavutil      54. 10.100 / 54. 10.100
  libavcodec     56.  8.102 / 56.  8.102
  libavformat    56.  9.101 / 56.  9.101
  libavdevice    56.  1.100 / 56.  1.100
  libavfilter     5.  1.106 /  5.  1.106
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  1.100 /  1.  1.100
  libpostproc    53.  3.100 / 53.  3.100
[avi @ 0x34f0ba0] Could not find codec parameters for stream 0 (Video: none (UQY2 / 0x32595155), none, 320x240, 9186 kb/s): unknown codec
Consider increasing the value for the 'analyzeduration' and 'probesize' options
utvideo-yuv422p10le_UQY2_crc32-A431CD5F.avi: could not find codec parameters
Input #0, avi, from 'utvideo-yuv422p10le_UQY2_crc32-A431CD5F.avi':
  Metadata:
    encoder         : Lavf56.7.104
  Duration: 00:00:05.00, start: 0.000000, bitrate: 9131 kb/s
    Stream #0:0: Video: none (UQY2 / 0x32595155), none, 320x240, 9186 kb/s, 25 fps, 25 tbr, 25 tbn, 25 tbc
At least one output file must be specified

[Carl Eugen Hoyos]

4:2:2 sample uploaded to ​http://samples.ffmpeg.org/ffmpeg-bugs/trac/ticket4044/

[ponpon]

+1 for this enhancement

[Elon Musk]

Can I get more useful sample?
One that have more than 1 slice and is pure black or pure white.

[Carl Eugen Hoyos]

I believe the sample was uploaded by a user, I cannot encode with libutvideo.

[Elon Musk]

Then please remove nonfunctional wrapper encoder.

[Elon Musk]

Fixed this specific sample in 115e63c8d6791ebdc921caf40c3def024690af2e.