Colour artefacts in wmv3

[Carl Eugen Hoyos]

(issue 255)
When decoding attached sample with ffmpeg/libavcodec, it shows red artefacts.
The sample plays fine with mplayer -vc wmv9dmo

ffmpeg -i hot-hand-350_20sec.wmv -qscale 5 out.avi
FFmpeg version git-N-27829-g08c8663, Copyright (c) 2000-2011 the FFmpeg developers

built on Mar 4 2011 10:18:55 with gcc 4.5.2
configuration: --cc=/usr/local/gcc-4.5.2/bin/gcc --enable-gpl
libavutil 50. 39. 0 / 50. 39. 0
libavcodec 52.113. 2 / 52.113. 2
libavformat 52.102. 0 / 52.102. 0
libavdevice 52. 2. 3 / 52. 2. 3
libavfilter 1. 76. 0 / 1. 76. 0
libswscale 0. 12. 0 / 0. 12. 0

Seems stream 0 codec frame rate differs from container frame rate: 1000.00 (1000/1) -> 25.00 (25/1)
Input #0, asf, from 'hot-hand-350_20sec.wmv':

Metadata:

WMFSDKVersion : 9.00.00.2980
WMFSDKNeeded : 0.0.0.0000
IsVBR : 0
title :
artist :
copyright :
comment :

Duration: 00:00:20.96, start: 5.000000, bitrate: 400 kb/s

Chapter #0.0: start 15.800000, end 25.960000
Metadata:

title : half

Stream #0.0(hrv): Video: wmv3, yuv420p, 384x288, 350 kb/s, 25 tbr, 1k tbn, 1k tbc

[buffer @ 0x11ebc90] w:384 h:288 pixfmt:yuv420p
Output #0, avi, to 'out.avi':

Metadata:

WMFSDKVersion : 9.00.00.2980
WMFSDKNeeded : 0.0.0.0000
IsVBR : 0
INAM :
IART :
ICOP :
ICMT :
ISFT : Lavf52.102.0
Chapter #0.0: start 10.800000, end 20.960000
Metadata:

title : half

Stream #0.0(hrv): Video: mpeg4, yuv420p, 384x288, q=2-31, 200 kb/s, 25 tbn, 25 tbc

Stream mapping:

Stream #0.0 -> #0.0

Press [q] to stop encoding
frame= 524 fps= 0 q=5.0 Lsize= 2434kB time=20.96 bitrate= 951.2kbits/s
video:2416kB audio:0kB global headers:0kB muxing overhead 0.749616%

[Carl Eugen Hoyos]

Fixed by Ronald Bultje.

​http://git.videolan.org/?p=ffmpeg.git;a=commit;h=c47d3835021effc04bc1fd2cef6be31e1b186491