[Mp4-tech] MPEG-4 version 2 AAC rewrite decoder

Tracy Yang tracy.yang vidiator.com
Mon Aug 2 16:06:14 EDT 2004


I downloaded and compiled the MPEG-4 version 2 (ISO/IEC 14496-5:2001)
AAC codec. However, I can't make the decoder in rewrite directory work
for AAC raw data
I tried to use the example command lines gave in the readme_usuage in
version 1 as following:
Encoding:
mp4auenc -m tf -c "-aac_raw -aac_tns" -r <bit rate> -o bitstream.aac
original.wav
Decoding:
mp4vaudec -c "-aac_raw" -aaceof bitstream.aac -o output.wav -s <sampling
freq> -n <num channels>
But the decoder doesn't work. I found it stops at the function:
MP4Audio_ProbeFile(bitFileName)
Can someone give me a pair of sample command lines that can encode and
decode in plain AAC mode? 


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