aasc: support 8bpp

[ami_stuff]

decodes correctly with original codec

​http://www.datafilehost.com/download-f9cdef04.html

C:\>ffmpeg -i aasc_8pp.avi -vcodec msmpeg4v2 out.avi
ffmpeg version N-40756-g703e920 Copyright (c) 2000-2012 the FFmpeg developers
  built on May 17 2012 02:26:05 with gcc 4.5.0 20100414 (Fedora MinGW 4.5.0-1.fc
14)
  configuration: --prefix=/var/www/users/research/ffmpeg/snapshots/build --arch=
x86 --target-os=mingw32 --cross-prefix=i686-pc-mingw32- --cc='ccache i686-pc-min
gw32-gcc' --enable-w32threads --enable-memalign-hack --enable-runtime-cpudetect
--enable-cross-compile --enable-static --disable-shared --extra-libs='-lws2_32 -
lwinmm' --extra-cflags='--static -I/var/www/users/research/ffmpeg/snapshots/buil
d/include' --extra-ldflags='-static -L/var/www/users/research/ffmpeg/snapshots/b
uild/lib' --enable-bzlib --enable-zlib --enable-gpl --enable-version3 --enable-n
onfree --enable-libx264 --enable-libspeex --enable-libtheora --enable-libvorbis
--enable-libfaac --enable-libxvid --enable-libopencore-amrnb --enable-libopencor
e-amrwb --enable-libmp3lame --enable-libvpx --disable-decoder=libvpx
  libavutil      51. 53.100 / 51. 53.100
  libavcodec     54. 21.101 / 54. 21.101
  libavformat    54.  5.100 / 54.  5.100
  libavdevice    53.  4.100 / 53.  4.100
  libavfilter     2. 74.100 /  2. 74.100
  libswscale      2.  1.100 /  2.  1.100
  libswresample   0. 11.100 /  0. 11.100
  libpostproc    52.  0.100 / 52.  0.100
Input #0, avi, from 'aasc_8pp.avi':
  Duration: 00:00:05.95, start: 0.000000, bitrate: 2168 kb/s
    Stream #0:0: Video: aasc (AASC / 0x43534141), bgr24, 192x128, 24 tbr, 24 tbn
, 24 tbc
w:192 h:128 pixfmt:bgr24 tb:1/1000000 sar:0/1 sws_param:flags=2
[buffersink @ 0x1de1ae0] No opaque field provided
[format @ 0x1de2320] auto-inserting filter 'auto-inserted scaler 0' between the
filter 'src' and the filter 'format'
[scale @ 0x1de2ca0] w:192 h:128 fmt:bgr24 sar:0/1 -> w:192 h:128 fmt:yuv420p sar
:0/1 flags:0x4
Output #0, avi, to 'out.avi':
  Metadata:
    ISFT            : Lavf54.5.100
    Stream #0:0: Video: msmpeg4v2 (MP42 / 0x3234504D), yuv420p, 192x128, q=2-31,
 200 kb/s, 24 tbn, 24 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (aasc -> msmpeg4v2)
Press [q] to stop, [?] for help
[aasc @ 0x1dd2320] Next line is beyond buffer bounds
frame=  143 fps=0.0 q=2.0 Lsize=     134kB time=00:00:05.95 bitrate= 184.7kbits/
s
video:125kB audio:0kB global headers:0kB muxing overhead 7.158605%

[Elon Musk]

Implemented.