Opened 2 years ago

#5119 new defect

Skip ID3 tag in aac file

Reported by: cehoyos Owned by:
Priority: wish Component: avformat
Version: git-master Keywords: aac id3v2
Cc: Blocked By:
Blocking: Reproduced by developer: no
Analyzed by developer: no

Description

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.

Attachments (1)

CPEBach_Sample_File_cut.aac (1000.0 KB) - added by cehoyos 2 years ago.

Download all attachments as: .zip

Change History (1)

Changed 2 years ago by cehoyos

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