[FFmpeg-trac] #539(avcodec:open): Some MPEG-2 streams produce corrupted video output

FFmpeg trac at avcodec.org
Sun Oct 9 22:34:27 CEST 2011


#539: Some MPEG-2 streams produce corrupted video output
-------------------------------------+-------------------------------------
             Reporter:  STaRGaZeR    |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  normal       |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:  MPEG-2       |               Blocked By:
  MPEG2 corruption                   |  Reproduced by developer:  1
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Changes (by cehoyos):

 * status:  new => open
 * component:  undetermined => avcodec
 * reproduced:  0 => 1


Comment:

 Works fine (some warnings) with mplayer -vc ffmpeg12vdpau
 {{{
 $ ffmpeg -i ticket539.m2v -f null -
 ffmpeg version N-33430-gcb50ada, Copyright (c) 2000-2011 the FFmpeg
 developers
   built on Oct  9 2011 20:28:29 with gcc 4.5.3
   configuration: --cc=/usr/local/gcc-4.5.3/bin/gcc
   libavutil    51. 20. 1 / 51. 20. 1
   libavcodec   53. 19. 1 / 53. 19. 1
   libavformat  53. 14. 0 / 53. 14. 0
   libavdevice  53.  4. 0 / 53.  4. 0
   libavfilter   2. 43. 6 /  2. 43. 6
   libswscale    2.  1. 0 /  2.  1. 0
 [mpeg1video @ 0x12d9be0] invalid frame_pred_frame_dct
 [mpegvideo @ 0x12d3780] Estimating duration from bitrate, this may be
 inaccurate
 Input #0, mpegvideo, from 'ticket539.m2v':
   Duration: 00:00:02.62, bitrate: 7800 kb/s
     Stream #0:0: Video: mpeg2video (Main), yuv420p, 720x576 [SAR 64:45 DAR
 16:9], 7800 kb/s, 25 fps, 25 tbr, 1200k tbn, 50 tbc
 [buffer @ 0x12e7760] w:720 h:576 pixfmt:yuv420p tb:1/1000000 sar:64/45
 sws_param:
 Output #0, null, to 'pipe:':
   Metadata:
     encoder         : Lavf53.14.0
     Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 720x576
 [SAR 64:45 DAR 16:9], q=2-31, 200 kb/s, 90k tbn, 25 tbc
 Stream mapping:
   Stream #0.0 -> #0.0 (mpeg2video -> rawvideo)
 Press [q] to stop, [?] for help
 [mpeg2video @ 0x12d9be0] invalid frame_pred_frame_dct
     Last message repeated 1 times
 [mpeg2video @ 0x12d9be0] MT_FIELD in progressive_sequence
     Last message repeated 25 times
 [mpeg2video @ 0x12d9be0] Warning MVs not available
 [mpeg2video @ 0x12d9be0] concealing 1170 DC, 1170 AC, 1170 MV errors
 [mpeg2video @ 0x12d9be0] invalid frame_pred_frame_dct
 [mpeg2video @ 0x12d9be0] MT_FIELD in progressive_sequence
     Last message repeated 25 times
 [mpeg2video @ 0x12d9be0] Warning MVs not available
 [mpeg2video @ 0x12d9be0] concealing 1170 DC, 1170 AC, 1170 MV errors
 [mpeg2video @ 0x12d9be0] invalid frame_pred_frame_dct
 [mpeg2video @ 0x12d9be0] MT_FIELD in progressive_sequence
     Last message repeated 26 times

 ...

 [mpeg2video @ 0x12d9be0] concealing 855 DC, 855 AC, 855 MV errors
 [mpeg2video @ 0x12d9be0] invalid frame_pred_frame_dct
 [mpeg2video @ 0x12d9be0] MT_FIELD in progressive_sequence
     Last message repeated 17 times
 [mpeg2video @ 0x12d9be0] concealing 810 DC, 810 AC, 810 MV errors
 [mpeg2video @ 0x12d9be0] invalid frame_pred_frame_dct
     Last message repeated 1 times
 [mpeg2video @ 0x12d9be0] MT_FIELD in progressive_sequence
     Last message repeated 26 times
 [mpeg2video @ 0x12d9be0] concealing 1215 DC, 1215 AC, 1215 MV errors
 [mpeg2video @ 0x12d9be0] invalid frame_pred_frame_dct
 [mpeg2video @ 0x12d9be0] MT_FIELD in progressive_sequence
 [mpeg2video @ 0x12d9be0] ac-tex damaged at 7 8
 [mpeg2video @ 0x12d9be0] concealing 1305 DC, 1305 AC, 1305 MV errors
 frame=   81 fps=  0 q=0.0 Lsize=      -0kB time=00:00:03.24 bitrate=
 -0.1kbits/s    ^M
 video:0kB audio:0kB global headers:0kB muxing overhead -inf%
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/539#comment:2>
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