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AAC-Low Delay decoding issue

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Thushan Amarasiriwardena
AAC-Low Delay decoding issue
on Mar 15, 2011 at 9:41:38 pm

Howdy,

I'm having an issue decoding AAC-LD (Low Delay) files using a recent build of FFmpeg. Every time I try to decode it I get the issue: "Audio object type 23 is not supported"

This audio file is coming off an iPad using the built in compressor. Has anyone else had these issues? The file plays fine in QuickTime.

Many thanks,
-Thushan



ffmpeg -i 96ECEBBC-EBDC-43C7-90DE-01FCB7B0240B.m4a -ac 1 -ar 44100 96ECEBBC-EBDC-43C7-90DE-01FCB7B0240B.mp3

FFmpeg version SVN-r24986, Copyright (c) 2000-2010 the FFmpeg developers
built on Mar 14 2011 11:21:48 with gcc 4.4.3
configuration: --enable-gpl --enable-nonfree --enable-pthreads --enable-libx264 --enable-libfaac --enable-libmp3lame
libavutil 50.24. 0 / 50.24. 0
libavcore 0. 6. 0 / 0. 6. 0
libavcodec 52.87. 0 / 52.87. 0
libavformat 52.78. 3 / 52.78. 3
libavdevice 52. 2. 1 / 52. 2. 1
libavfilter 1.38. 1 / 1.38. 1
libswscale 0.11. 0 / 0.11. 0
[aac @ 0x1ea4930] Audio object type 23 is not supported.
Last message repeated 433 times
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x1ea3470] max_analyze_duration reached
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '96ECEBBC-EBDC-43C7-90DE-01FCB7B0240B.m4a':
Metadata:
major_brand : M4A
minor_version : 0
compatible_brands: M4A mp42isom
Duration: 00:00:30.75, start: 0.000000, bitrate: 93 kb/s
Stream #0.0(eng): Audio: aac, 0 channels, 65 kb/s
96ECEBBC-EBDC-43C7-90DE-01FCB7B0240B.mp3: Permission denied


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