Regression since a0cd98b5943a7807aff837f9adba1dd034ec2272, related to ticket #127
(The initial artefacts are unrelated.)
$ ffmpeg -i OUTPUT2.avi -an -qscale 2 out.avi
ffmpeg version N-32290-g6fc1299, Copyright (c) 2000-2011 the FFmpeg developers
built on Sep 2 2011 13:02:00 with gcc 4.5.3
configuration: --cc=/usr/local/gcc-4.5.3/bin/gcc
libavutil 51. 14. 0 / 51. 14. 0
libavcodec 53. 12. 0 / 53. 12. 0
libavformat 53. 10. 0 / 53. 10. 0
libavdevice 53. 3. 0 / 53. 3. 0
libavfilter 2. 37. 0 / 2. 37. 0
libswscale 2. 0. 0 / 2. 0. 0
[avi @ 0x12a1420] Format avi probed with size=2048 and score=100
[AVI demuxer @ 0x12a1a40] use odml:1
[mpeg4 @ 0x12a3440] Invalid and inefficient vfw-avi packed B frames detected
[avi @ 0x12a1420] All info found
Input #0, avi, from 'OUTPUT2.avi':
Metadata:
encoder : Lavf52.110.0
Duration: 00:00:10.03, start: 0.000000, bitrate: 1702 kb/s
Stream #0.0, 1, 100/2997: Video: mpeg4 (Advanced Simple Profile) (xvid / 0x64697678), yuv420p, 720x480 [SAR 32:27 DAR 16:9], 100/2997, 29.97 tbr, 29.97 tbn, 29.97 tbc
Stream #0.1, 17, 3/125: Audio: mp3 (U[0][0][0] / 0x0055), 48000 Hz, stereo, s16, 128 kb/s
[buffer @ 0x12a2680] w:720 h:480 pixfmt:yuv420p tb:1/1000000 sar:32/27 sws_param:
[mpeg4 @ 0x12a0e80] Unsupported bit depth: 0
Output #0, avi, to 'out.avi':
Metadata:
ISFT : Lavf53.10.0
Stream #0.0, 0, 100/2997: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 720x480 [SAR 32:27 DAR 16:9], 100/2997, q=2-31, 200 kb/s, 29.97 tbn, 29.97 tbc
Stream mapping:
Stream #0.0 -> #0.0 (mpeg4 -> mpeg4)
Press [q] to stop, [?] for help
[mpeg4 @ 0x12a3440] Unsupported bit depth: 0
[mpeg4 @ 0x12a3440] Invalid and inefficient vfw-avi packed B frames detected
[mpeg4 @ 0x12a3440] Unsupported bit depth: 0
[mpeg4 @ 0x12a3440] Discarding excessive bitstream in packed xvid
frame= 188 fps= 0 q=2.0 Lsize= 2411kB time=00:00:10.04 bitrate=1966.3kbits/s
video:2398kB audio:0kB global headers:0kB muxing overhead 0.532623%
