AVRn 1:1 raw interlaced mode - merge fields

[ami_stuff]

(issue 1474)

​http://roundup.libav.org/file710/avid_ntsc.rar

same issue with:

raw.c:
{ PIX_FMT_UYVY422, MKTAG('A', 'V', 'U', 'I') }, /* FIXME merge both fields */

C:\>ffmpeg -i C:\avid_ntsc_interlaced.avi out.avi
ffmpeg version N-37208-g01fcbdf Copyright (c) 2000-2012 the FFmpeg developers
  built on Jan 27 2012 18:34:52 with gcc 4.6.2
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-ru
ntime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libope
ncore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --en
able-libmp3lame --enable-libopenjpeg --enable-librtmp --enable-libschroedinger -
-enable-libspeex --enable-libtheora --enable-libvo-aacenc --enable-libvo-amrwben
c --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-
libxvid --enable-zlib
  libavutil      51. 34.101 / 51. 34.101
  libavcodec     53. 60.100 / 53. 60.100
  libavformat    53. 31.100 / 53. 31.100
  libavdevice    53.  4.100 / 53.  4.100
  libavfilter     2. 60.100 /  2. 60.100
  libswscale      2.  1.100 /  2.  1.100
  libswresample   0.  6.100 /  0.  6.100
  libpostproc    52.  0.100 / 52.  0.100
[avi @ 02142320] non-interleaved AVI
[mp3 @ 0214AEE0] Header missing
Input #0, avi, from 'C:\avid_ntsc_interlaced.avi':
  Duration: 00:00:00.29, start: 0.000000, bitrate: 137378 kb/s
    Stream #0:0: Video: rawvideo (AVRn / 0x6E525641), uyvy422, 720x486, 23.97 tb
r, 23.97 tbn, 23.97 tbc
    Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 44100 Hz, stereo, s16, 128 kb
/s
File 'out.avi' already exists. Overwrite ? [y/N] y
Incompatible pixel format 'uyvy422' for codec 'mpeg4', auto-selecting format 'yu
v420p'
[buffer @ 02151920] w:720 h:486 pixfmt:uyvy422 tb:1/1000000 sar:0/1 sws_param:
[buffersink @ 02151BA0] auto-inserting filter 'auto-inserted scale 0' between th
e filter 'src' and the filter 'out'
[scale @ 02152320] w:720 h:486 fmt:uyvy422 -> w:720 h:486 fmt:yuv420p flags:0x4
Output #0, avi, to 'out.avi':
  Metadata:
    ISFT            : Lavf53.31.100
    Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 720x486, q=2-31, 200
 kb/s, 23.97 tbn, 23.97 tbc
    Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 44100 Hz, stereo, s16, 128 kb
/s
Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo -> mpeg4)
  Stream #0:1 -> #0:1 (mp3 -> libmp3lame)
Press [q] to stop, [?] for help
[mp3 @ 0214AEE0] Header missing
Error while decoding stream #0:1
[mp3 @ 0214AEE0] incomplete frame
Error while decoding stream #0:1
frame=    7 fps=  0 q=7.7 Lsize=     113kB time=00:00:00.26 bitrate=3538.6kbits/
s
video:99kB audio:4kB global headers:0kB muxing overhead 9.821030%