[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>
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