[FFmpeg-trac] #4556(avformat:new): Autodetect PASC mp1 files with 420 byte frame size (4 byte zero-padding)

FFmpeg trac at avcodec.org
Thu May 14 10:22:10 CEST 2015


#4556: Autodetect PASC mp1 files with 420 byte frame size (4 byte zero-padding)
-------------------------------------+-------------------------------------
               Reporter:  cehoyos    |                  Owner:
                   Type:             |                 Status:  new
  enhancement                        |              Component:  avformat
               Priority:  wish       |               Keywords:  mp1 mp3
                Version:  git-       |  regression
  master                             |               Blocking:
             Blocked By:             |  Analyzed by developer:  0
Reproduced by developer:  0          |
-------------------------------------+-------------------------------------
 (videolan ticket 14538)
 A vlc user uploaded a DCC PASC file which is a mp1 file from DCC that uses
 a 420 byte header containing four bytes zero-padding.
 The file is not auto-detected by FFmpeg but can be converted if the mp3
 format is forced. If the format was forced, the mp1 codec was correctly
 auto-detected until 5669ae84.
 {{{
 $ ffmpeg -f mp3 -acodec mp1 -i 2\ WIcky\ cut.MPP
 ffmpeg version N-72127-g8252f63 Copyright (c) 2000-2015 the FFmpeg
 developers
   built with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl
   libavutil      54. 23.101 / 54. 23.101
   libavcodec     56. 39.100 / 56. 39.100
   libavformat    56. 33.101 / 56. 33.101
   libavdevice    56.  4.100 / 56.  4.100
   libavfilter     5. 16.101 /  5. 16.101
   libswscale      3.  1.101 /  3.  1.101
   libswresample   1.  1.100 /  1.  1.100
   libpostproc    53.  3.100 / 53.  3.100
 [mp1 @ 0x1bc2e60] Header missing
 [mp3 @ 0x1bba4a0] Estimating duration from bitrate, this may be inaccurate
 Input #0, mp3, from '2 WIcky cut.MPP':
   Duration: 00:00:53.33, start: 0.000000, bitrate: 384 kb/s
     Stream #0:0: Audio: mp1, 44100 Hz, stereo, s16p, 384 kb/s
 At least one output file must be specified
 }}}
 Decoding the file with FFmpeg produces many warnings.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/4556>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker


More information about the FFmpeg-trac mailing list