[FFmpeg-trac] #5119(avformat:new): Skip ID3 tag in aac file
FFmpeg
trac at avcodec.org
Sun Jan 3 00:00:01 CET 2016
#5119: Skip ID3 tag in aac file
--------------------------------------+-----------------------------------
Reporter: cehoyos | Owner:
Type: defect | Status: new
Priority: wish | Component: avformat
Version: git-master | Keywords: aac id3v2
Blocked By: | Blocking:
Reproduced by developer: 0 | Analyzed by developer: 0
--------------------------------------+-----------------------------------
http://thread.gmane.org/gmane.comp.video.ffmpeg.user/60140
A user uploaded an apparently broken aac file with an id3v2 tag. When
decoding the file an error message is shown and remuxing is impossible
unless {{{-skip_initial_bytes 0x670}}} is used.
{{{
$ ffmpeg -i CPEBach_Sample_File_cut.aac -acodec copy out.m4a
ffmpeg version N-77668-g7812997 Copyright (c) 2000-2016 the FFmpeg
developers
built with gcc 4.7 (SUSE Linux)
configuration: --enable-gpl
libavutil 55. 12.100 / 55. 12.100
libavcodec 57. 21.100 / 57. 21.100
libavformat 57. 21.100 / 57. 21.100
libavdevice 57. 0.100 / 57. 0.100
libavfilter 6. 23.100 / 6. 23.100
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
libpostproc 54. 0.100 / 54. 0.100
[aac @ 0x36aea20] Error decoding AAC frame header.
[aac @ 0x36ad3c0] Estimating duration from bitrate, this may be inaccurate
Input #0, aac, from 'CPEBach_Sample_File_cut.aac':
Metadata:
encoder : Lavf53.24.2
album : Composer_of_the_Week - Carl_Philipp_Emmanuel_Bach
date : 2011
genre : Radio_Programme
title : of the Week - Carl Philipp Emmanuel Bach 1714-1788
1. The Belligerent Flautist
artist : BBC Radio 4
track : 01
Duration: 00:00:42.95, bitrate: 190 kb/s
Stream #0:0: Audio: aac (LC), 44100 Hz, stereo, fltp, 190 kb/s
[ipod @ 0x36c1440] Codec for stream 0 does not use global headers but
container format requires global headers
Output #0, ipod, to 'out.m4a':
Metadata:
track : 01
album : Composer_of_the_Week - Carl_Philipp_Emmanuel_Bach
date : 2011
genre : Radio_Programme
title : of the Week - Carl Philipp Emmanuel Bach 1714-1788
1. The Belligerent Flautist
artist : BBC Radio 4
encoder : Lavf57.21.100
Stream #0:0: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo,
190 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
[ipod @ 0x36c1440] Malformed AAC bitstream detected: use the audio
bitstream filter 'aac_adtstoasc' to fix it ('-bsf:a aac_adtstoasc' option
with ffmpeg)
av_interleaved_write_frame(): Operation not permitted
size= 1kB time=00:00:00.02 bitrate= 194.0kbits/s speed= 394x
video:0kB audio:1kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: unknown
Conversion failed!
}}}
The bitstream filter cannot help.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/5119>
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