[FFmpeg-trac] #1536(undetermined:new): u263: problem with b-frames

[FFmpeg]

#1536: u263: problem with b-frames
-------------------------------------+-------------------------------------
               Reporter:  ami_stuff  |                  Owner:
                   Type:  defect     |                 Status:  new
               Priority:  normal     |              Component:
                Version:             |  undetermined
  unspecified                        |               Keywords:
             Blocked By:             |               Blocking:
Reproduced by developer:  0          |  Analyzed by developer:  0
-------------------------------------+-------------------------------------
 u263 codec have a possibility to encode video with enabled b-frames (1-5),
 ffmpeg decodes such files incorrectly.

 {{{
 $ ffmpeg -i u263_b-frames_5.avi out.avi
 ffmpeg version 0.10.2.git-ab7d6cb Copyright (c) 2000-2012 the FFmpeg
 developers
   built on May 30 2012 13:37:47 with gcc 4.6.1
   configuration: --disable-ffprobe --enable-gpl
   libavutil      51. 55.100 / 51. 55.100
   libavcodec     54. 23.100 / 54. 23.100
   libavformat    54.  6.101 / 54.  6.101
   libavdevice    54.  0.100 / 54.  0.100
   libavfilter     2. 77.100 /  2. 77.100
   libswscale      2.  1.100 /  2.  1.100
   libswresample   0. 15.100 /  0. 15.100
   libpostproc    52.  0.100 / 52.  0.100
 [h263 @ 0189c720] Warning: not compiled with thread support, using thread
 emulat
 ion
 Input #0, avi, from 'u263_b-frames_5.avi':
   Duration: 00:00:12.64, start: 0.000000, bitrate: 403 kb/s
     Stream #0:0: Video: h263 (U263 / 0x33363255), yuv420p, 320x240, 23.97
 tbr, 2
 3.97 tbn, 23.97 tbc
 w:320 h:240 pixfmt:yuv420p tb:100/2397 sar:0/1 sws_param:flags=2
 [buffersink @ 018a23c0] No opaque field provided
 [mpeg4 @ 01898e40] Warning: not compiled with thread support, using thread
 emula
 tion
 [h263 @ 0189c720] Warning: not compiled with thread support, using thread
 emulat
 ion
 Output #0, avi, to 'out.avi':
   Metadata:
     ISFT            : Lavf54.6.101
     Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 320x240,
 q=2-31, 200
  kb/s, 23.97 tbn, 23.97 tbc
 Stream mapping:
   Stream #0:0 -> #0:0 (h263 -> mpeg4)
 Press [q] to stop, [?] for help
 [h263 @ 0189c720] illegal ac vlc code at 0x3
 [h263 @ 0189c720] Error at MB: 63
 [h263 @ 0189c720] concealing 300 DC, 300 AC, 300 MV errors
 [h263 @ 0189c720] illegal ac vlc code at 12x0
 [h263 @ 0189c720] Error at MB: 12
 [h263 @ 0189c720] concealing 300 DC, 300 AC, 300 MV errors
 [h263 @ 0189c720] illegal ac vlc code at 17x5
 [h263 @ 0189c720] Error at MB: 122
 [h263 @ 0189c720] concealing 300 DC, 300 AC, 300 MV errors
 [h263 @ 0189c720] b cbpy damaged at 19 5
 [h263 @ 0189c720] Error at MB: 124
 [h263 @ 0189c720] concealing 300 DC, 300 AC, 300 MV errors
 [h263 @ 0189c720] run overflow at 13x0 i:0
 [h263 @ 0189c720] Error at MB: 13
 [h263 @ 0189c720] concealing 300 DC, 300 AC, 300 MV errors
 [h263 @ 0189c720] b mb_type damaged at 18 3
 [h263 @ 0189c720] Error at MB: 81
 [h263 @ 0189c720] concealing 300 DC, 300 AC, 300 MV errors
 [h263 @ 0189c720] illegal ac vlc code at 19x3
 [h263 @ 0189c720] Error at MB: 82
 [h263 @ 0189c720] concealing 300 DC, 300 AC, 300 MV errors
 [h263 @ 0189c720] b mb_type damaged at 5 2
 [h263 @ 0189c720] Error at MB: 47
 [cut]
 [h263 @ 0189c720] concealing 300 DC, 300 AC, 300 MV errors
 [h263 @ 0189c720] b mb_type damaged at 16 0
 [h263 @ 0189c720] Error at MB: 16
 [h263 @ 0189c720] concealing 300 DC, 300 AC, 300 MV errors
 frame=  296 fps= 74 q=5.1 size=     467kB time=00:00:12.55 bitrate=
 304.7kbits/s
 illegal ac vlc code at 13x0
 [h263 @ 0189c720] Error at MB: 13
 [h263 @ 0189c720] concealing 300 DC, 300 AC, 300 MV errors
 [h263 @ 0189c720] b mb_type damaged at 17 1
 [h263 @ 0189c720] Error at MB: 38
 [h263 @ 0189c720] concealing 300 DC, 300 AC, 300 MV errors
 frame=  298 fps= 74 q=5.2 Lsize=     474kB time=00:00:12.64 bitrate=
 306.9kbits/
 s
 video:461kB audio:0kB global headers:0kB muxing overhead 2.776824%
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1536>
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