[Ffmpeg-devel] [Ffmpeg-devel-old] AAC support in ffmpeg
Sat Apr 23 02:54:44 CEST 2005
Hi, I am trying to decode AAC-LC audio and save it as amr(nb) from an
MP4 (also tried MOV ) file using ffmpeg, as follows -
./ffmpeg -i ./test.mp4 -acodec amr_nb -ar 8000 -ac 1 -ab 12 -y -vn out.amr
This is the ffmpeg's response-
ffmpeg version 0.4.9-pre1, build 4747, Copyright (c)
2000-2004 Fabrice Bellard
configuration: --enable-faac --enable-amr_nb --enable-amr_nb-fixed
built on Apr 21 2005 15:58:19, gcc: 3.2.3 20030502 (Red Hat
Input #0, mov,mp4,m4a,3gp,3g2, from './Picnic.mp4':
Duration: 00:00:40.6, start: 0.000000, bitrate: 107 kb/s
Stream #0.0: Video: mpeg4, 192x144, 15.01 fps
Stream #0.1: Audio: 0x6134706d, 44100 Hz, mono
Unsupported codec (id=86018) for input stream #0.1
I have installed libfaac and built ffmpeg with faac and amr_nb
enabled, as can be seen above. The AMR encoding works for MP2 and
Windows media audio codecs.
Also, I confirmed using mp4UI that the input audio stream is AAC LC.
I also tried to convert AMR audio files to ACC as -
ffmpeg -i ./out.amr -acodec aac -y -vn out.aac
But this does not work either.
ffmpeg returns the following -
Stream #0.0: Audio: amr_nb, 8000 Hz, mono
Unable for find a suitable output format for 'out.aac'
I would really appreciate any help in understanding why AAC audio
decoding/encoding is not working.
Thanks and regards,
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