[FFmpeg-user] ffmpeg errors

[Noel Hunt]

I have been using ffmpeg for a while to re-encode video files
I have received into xvid/mp3 for an old Sony DVD player I
have.

I have recently tried to convert some files for which ffmpeg
generates tens of thousands of errors, e.g.:

+ ffmpeg -i /tmp/Endeavour.s02e01.Trove.mp4 -y -vcodec libxvid -acodec
libmp3lame -ab 128  -ac 2 avi/.mp4.avi
ffmpeg version 2.2.3 Copyright (c) 2000-2014 the FFmpeg developers
  built on Jun 11 2014 09:17:30 with gcc 4.2.1 (GCC) 20070719 [FeeBSD]
  configuration: --prefix=/home/noel --enable-libmp3lame --enable-libx264
--enable-gpl -- nable-libxvid
  libavutil      52. 66.100 / 52. 66.100
  libavcodec     55. 52.102 / 55. 52.102
  libavformat    55. 33.100 / 55. 33.100
  libavdevice    55. 10.100 / 55. 10.100
  libavfilter     4.  2.100 /  4.  2.100
  libswscale      2.  5.102 /  2.  5.102
  libswresample   0. 18.100 /  0. 18.100
  libpostproc    52.  3.100 / 52.  3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/tmp/Endeavour.s02e01.Trove.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 1
    compatible_brands: isomavc1
    creation_time   : 2014-03-29 22:05:56
  Duration: 01:29:41.72, start: 0.000000, bitrate: 799 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv,
bt709), 720x404  680 kb/s, 25 fps, 25 tbr, 25k tbn, 50 tbc (default)
    Metadata:
      creation_time   : 2014-03-29 22:05:56
      handler_name    : Video
    Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo,
fltp, 114 kb/s (d fault)
    Metadata:
      creation_time   : 2014-03-29 22:06:01
      handler_name    : GPAC ISO Audio Handler
Output #0, avi, to 'avi/.mp4.avi':
  Metadata:
    major_brand     : isom
    minor_version   : 1
    compatible_brands: isomavc1
    ISFT            : Lavf55.33.100
    Stream #0:0(und): Video: mpeg4 (libxvid) (xvid / 0x64697678), yuv420p,
720x404, q=2-3 , 200 kb/s, 25 tbn, 25 tbc (default)
    Metadata:
      creation_time   : 2014-03-29 22:05:56
      handler_name    : Video
    Stream #0:1(und): Audio: mp3 (libmp3lame) (U[0][0][0] / 0x0055), 48000
Hz, stereo, fl p, 128 kb/s (default)
    Metadata:
      creation_time   : 2014-03-29 22:06:01
      handler_name    : GPAC ISO Audio Handler
Stream mapping:
  Stream #0:0 -> #0:0 (h264 -> libxvid)
  Stream #0:1 -> #0:1 (aac -> libmp3lame)
Press [q] to stop, [?] for help
[h264 @ 0x2a34bc00] Cannot use next picture in error concealment
[h264 @ 0x2a34b800] concealing 999 DC, 999 AC, 999 MV errors in B frame
[h264 @ 0x2a34bc00] concealing 990 DC, 990 AC, 990 MV errors in P frame
[h264 @ 0x2a34c000] Reference 2 >= 2
[h264 @ 0x2a34c000] error while decoding MB 0 0, bytestream 2078
[h264 @ 0x2a34c000] concealing 1170 DC, 1170 AC, 1170 MV errors in B frame
[h264 @ 0x2a34bc00] Reference 2 >= 2
[h264 @ 0x2a34bc00] error while decoding MB 1 1, bytestream 1871
[h264 @ 0x2a34bc00] concealing 1170 DC, 1170 AC, 1170 MV errors in B frame
[h264 @ 0x2a34b800] Reference 4 >= 4
[h264 @ 0x2a34b800] error while decoding MB 2 0, bytestream 21845
[h264 @ 0x2a34b800] concealing 1170 DC, 1170 AC, 1170 MV errors in P frame
    ...

The resulting video file is so corrupt it is unusable. I have tried ffmeg's
in-built
h264 -> mpeg4 with no difference although I have no real idea where these
errors are coming from.

I am running ffmpeg on FreeBSD, and have just recompiled the latest which
you can see above.

I resorted to using xvid4psp on a pc and that seemed to be able to deal with
these files but I want to avoid using a pc if possible.

Would anyone have any idea as to the source of these errors?

Noel Hunt