[FFmpeg-trac] #5243(avcodec:new): MPEG1 decoding error

[FFmpeg]

#5243: MPEG1 decoding error
------------------------------------+-----------------------------------
             Reporter:  kyh96403    |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avcodec
              Version:  git-master  |               Resolution:
             Keywords:  mpeg1       |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
------------------------------------+-----------------------------------

Comment (by kyh96403):

 ok...
 $ ffmpeg -i FBOW05XX_broken.MPG  123.avi
 ffmpeg version 3.0.git Copyright (c) 2000-2016 the FFmpeg developers
   built with gcc 5.3.0 (GCC)
   configuration:
   libavutil      55. 18.100 / 55. 18.100
   libavcodec     57. 24.103 / 57. 24.103
   libavformat    57. 25.100 / 57. 25.100
   libavdevice    57.  0.101 / 57.  0.101
   libavfilter     6. 32.100 /  6. 32.100
   libswscale      4.  0.100 /  4.  0.100
   libswresample   2.  0.101 /  2.  0.101
 Input #0, mpeg, from 'FBOW05XX_broken.MPG':
   Duration: 00:00:04.42, start: 0.447067, bitrate: 1258 kb/s
     Stream #0:0[0x1e0]: Video: mpeg1video, yuv420p(tv), 320x240 [SAR 1:1
 DAR 4:3], 1018 kb/s, 12 fps, 12 tbr, 90k tbn, 12 tbc
     Stream #0:1[0x1c0]: Audio: mp2, 44100 Hz, stereo, s16p, 192 kb/s
 File '123.avi' already exists. Overwrite ? [y/N] y
 Output #0, avi, to '123.avi':
   Metadata:
     ISFT            : Lavf57.25.100
     Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 320x240 [SAR
 1:1 DAR 4:3], q=2-31, 200 kb/s, 12 fps, 12 tbn, 12 tbc
     Metadata:
       encoder         : Lavc57.24.103 mpeg4
     Side data:
       cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
     Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 44100 Hz, stereo, fltp,
 192 kb/s
     Metadata:
       encoder         : Lavc57.24.103 ac3
 Stream mapping:
   Stream #0:0 -> #0:0 (mpeg1video (native) -> mpeg4 (native))
   Stream #0:1 -> #0:1 (mp2 (native) -> ac3 (native))
 Press [q] to stop, [?] for help
 [mpeg1video @ 025b8460] [mpeg1video @ 025b8460] ac-tex damaged at 16 12
 end mismatch left=679 149A62
 [mpeg1video @ 025b8460] Warning MVs not available
 [mpeg1video @ 025b8460] concealing 60 DC, 60 AC, 60 MV errors in B frame
 [mpeg1video @ 025b8460] [mpeg1video @ 025b8460] [mpeg1video @ 025b8460]
 [mpeg1video @ 025b8460] [mpeg1video @ 025b8460] end mismatch left=30
 124BAC
 mb incr damaged
 [mpeg1video @ 025b8460] ac-tex damaged at 15 10
 slice mismatch
 ac-tex damaged at 19 8
 mb incr damaged
 [mpeg1video @ 025b8460] [mpeg1video @ 025b8460] [mpeg1video @ 025b8460]
 [mpeg1video @ 025b8460] end mismatch left=1619 6197B0
 ac-tex damaged at 0 7
 skip with previntra
 mb incr damaged
 [mpeg1video @ 025b8460] Warning MVs not available
 [mpeg1video @ 025b8460] concealing 240 DC, 240 AC, 240 MV errors in B
 frame
 Past duration 0.798790 too large
 [mpeg1video @ 025b8460] [mpeg1video @ 025b8460] [mpeg1video @ 025b8460]
 [mpeg1video @ 025b8460] invalid mb type in P Frame at 0 14
 mb incr damaged
 invalid mb type in P Frame at 17 9
 ac-tex damaged at 16 3
 [mpeg1video @ 025b8460] Warning MVs not available
 [mpeg1video @ 025b8460] concealing 80 DC, 80 AC, 80 MV errors in P frame
      Last message repeated 3 times
 mb incr damagede repeated 2 timesessage repeated 1 times
     Last message repeated 1 times
 ..
 ..
 ..

--
Ticket URL: <https://trac.ffmpeg.org/ticket/5243#comment:2>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker