fix asf demuxer

[ami_stuff]

As a side note, I must say that lavf ASF demuxer outputs wrong data, so for
example eleventh or twelfth frame in
http://samples.ffmpeg.org/V-codecs/MSS1/screen_codec.wmv
is demuxed wrong compared to MPlayer. And of course it causes decoding errors.

 http://article.gmane.org/gmane.comp.video.libav.devel/28505

 http://samples.ffmpeg.org/V-codecs/MSS1/screen_codec.wmv
 http://samples.ffmpeg.org/V-codecs/MSS1/GipsyGuitar.wmv

C:\>ffmpeg -i screen_codec.wmv out.avi
ffmpeg version N-41793-gcb08b6e Copyright (c) 2000-2012 the FFmpeg developers
  built on Jun 21 2012 14:12:34 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 -lpthread' --extra-cflags='--static -I/var/www/users/research/ffmpeg/snap
shots/build/include' --extra-ldflags='-static -L/var/www/users/research/ffmpeg/s
napshots/build/lib' --enable-bz  libavutil      51. 59.100 / 51. 59.100
  libavcodec     54. 29.100 / 54. 29.100
  libavformat    54. 10.100 / 54. 10.100
  libavdevice    54.  0.100 / 54.  0.100
  libavfilter     2. 82.100 /  2. 82.100
  libswscale      2.  1.100 /  2.  1.100
  libswresample   0. 15.100 /  0. 15.100
  libpostproc    52.  0.100 / 52.  0.100
Guessed Channel Layout for  Input Stream #0.0 : mono
Input #0, asf, from 'screen_codec.wmv':
  Metadata:
    WMFSDKVersion   : 7.01.00.3055
    WMFSDKNeeded    : 0.0.0.0000
  Duration: 00:01:35.87, start: 0.192000, bitrate: 82 kb/s
    Stream #0:0: Audio: wmav2 (a[1][0][0] / 0x0161), 8000 Hz, mono, s16, 0 kb/s
    Stream #0:1: Video: mss1 (MSS1 / 0x3153534D), pal8, 1024x768, 1k tbr, 1k tbn
, 1k tbc
w:1024 h:768 pixfmt:pal8 tb:1/1000 fr:1000/1 sar:0/1 sws_param:flags=2
[ffmpeg_buffersink @ 0x1e17c20] No opaque field provided
[format @ 0x1e17f00] auto-inserting filter 'auto-inserted scaler 0' between the
filter 'Parsed_null_0' and the filter 'format'
[auto-inserted scaler 0 @ 0x1e18900] w:1024 h:768 fmt:pal8 sar:0/1 -> w:1024 h:7
68 fmt:yuv420p sar:0/1 flags:0x4
Output #0, avi, to 'out.avi':
  Metadata:
    WMFSDKVersion   : 7.01.00.3055
    WMFSDKNeeded    : 0.0.0.0000
    ISFT            : Lavf54.10.100
    Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 1024x768, q=2-31, 20
0 kb/s, 1k tbn, 1k tbc
    Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 8000 Hz, mono, s16
Stream mapping:
  Stream #0:1 -> #0:0 (mss1 -> mpeg4)
  Stream #0:0 -> #0:1 (wmav2 -> libmp3lame)
Press [q] to stop, [?] for help
Multiple frames in a packet from stream 0
frame=    9 fps=0.0 q=24.0 size=      78kB time=00:00:02.23 bitrate= 287.2kbits/
Error while decoding stream #0:1: Invalid data found when processing input
    Last message repeated 4 times
frame=   19 fps= 19 q=31.0 size=     150kB time=00:00:10.72 bitrate= 114.7kbits/
frame=   28 fps= 18 q=31.0 size=     277kB time=00:00:20.54 bitrate= 110.6kbits/
frame=   40 fps= 19 q=31.0 size=     348kB time=00:00:28.00 bitrate= 101.9kbits/
frame=   50 fps= 20 q=31.0 size=     426kB time=00:00:35.28 bitrate=  99.0kbits/
frame=   61 fps= 20 q=24.8 size=     508kB time=00:00:41.54 bitrate= 100.3kbits/
frame=   70 fps= 20 q=31.0 size=     619kB time=00:00:51.12 bitrate=  99.2kbits/
frame=   80 fps= 19 q=31.0 size=     728kB time=00:01:01.20 bitrate=  97.4kbits/
Error while decoding stream #0:1: Invalid data found when processing input
    Last message repeated 4 times
frame=   88 fps= 19 q=31.0 size=     842kB time=00:01:11.64 bitrate=  96.2kbits/
Error while decoding stream #0:1: Invalid data found when processing input
    Last message repeated 18 times
frame=   90 fps= 18 q=31.0 size=     928kB time=00:01:22.50 bitrate=  92.2kbits/
Error while decoding stream #0:1: Invalid data found when processing input
    Last message repeated 7 times
frame=   95 fps= 17 q=31.0 Lsize=    2534kB time=00:01:33.81 bitrate= 221.3kbits
/s
video:258kB audio:17kB subtitle:0 global headers:0kB muxing overhead 821.800131%

[ami_stuff]

"GipsyGuitar?.wmv" still have some problems (maybe related to ticket #1708)

C:\>ffmpeg -i GipsyGuitar.wmv -an -f null -
ffmpeg version N-45739-g04bf2e7 Copyright (c) 2000-2012 the FFmpeg developers
  built on Oct 20 2012 00:16:49 with gcc 4.7.2 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-pthreads --enable-runt
ime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libass -
-enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enab
le-libgsm --enable-libmp3lame --enable-libnut --enable-libopenjpeg --enable-libo
pus --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheo
ra --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-li
bvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --ena
ble-zlib
  libavutil      51. 76.100 / 51. 76.100
  libavcodec     54. 67.100 / 54. 67.100
  libavformat    54. 33.100 / 54. 33.100
  libavdevice    54.  3.100 / 54.  3.100
  libavfilter     3. 19.103 /  3. 19.103
  libswscale      2.  1.101 /  2.  1.101
  libswresample   0. 16.100 /  0. 16.100
  libpostproc    52.  1.100 / 52.  1.100
Guessed Channel Layout for  Input Stream #0.0 : mono
Input #0, asf, from 'GipsyGuitar.wmv':
  Metadata:
    title           : Gipsy Guitar
    artist          : Gerhard Graf-Martinez
    copyright       : (c) 2001 Schott Music International Germany
    comment         : www.schott-music.com | www.graf-martinez.de
    WMFSDKVersion   : 7.00.00.1956
    WMFSDKNeeded    : 0.0.0.0000
  Duration: 00:02:15.50, start: 0.000000, bitrate: 95 kb/s
    Stream #0:0: Audio: sipr (0[1][0][0] / 0x0130), 16000 Hz, mono, flt, 16 kb/s

    Stream #0:1: Video: mss1 (MSS1 / 0x3153534D), pal8, 400x240, 24 tbr, 1k tbn,
 1k tbc
Output #0, null, to 'pipe:':
  Metadata:
    title           : Gipsy Guitar
    artist          : Gerhard Graf-Martinez
    copyright       : (c) 2001 Schott Music International Germany
    comment         : www.schott-music.com | www.graf-martinez.de
    WMFSDKVersion   : 7.00.00.1956
    WMFSDKNeeded    : 0.0.0.0000
    encoder         : Lavf54.33.100
    Stream #0:0: Video: rawvideo, pal8, 400x240, q=2-31, 200 kb/s, 90k tbn, 24 t
bc
Stream mapping:
  Stream #0:1 -> #0:0 (mss1 -> rawvideo)
Press [q] to stop, [?] for help
[null @ 024539c0] Encoder did not produce proper pts, making some up.
Error while decoding stream #0:1: Invalid data found when processing input
    Last message repeated 137 times
frame= 1205 fps=0.0 q=0.0 size=       0kB time=00:00:50.20 bitrate=   0.0kbits/s
Error while decoding stream #0:1: Invalid data found when processing input
    Last message repeated 172 times
frame= 2645 fps=0.0 q=0.0 size=       0kB time=00:01:50.20 bitrate=   0.0kbits/s
Error while decoding stream #0:1: Invalid data found when processing input
    Last message repeated 53 times
frame= 3207 fps=2812 q=0.0 Lsize=       0kB time=00:02:13.62 bitrate=   0.0kbits
/s dup=3026 drop=0
video:200kB audio:0kB subtitle:0 global headers:0kB muxing overhead -100.000000%

[richardpl]

Yes, asf demuxer is broken, there should be only one open bug report for it.