[Mp4-tech] [audio] how to use adif2mp4 tool for SBR???

[Andreas Schneider]

Hello Datta,
The iso encoder requires the commandline option -sbr to produce an 
SBR-enabled stream. Sample commandline:
"enc -r 48000 -c "-lc" -o blafasl -sbr input.wav"
To convert this to an mp4-file, you must tell the converter the sampling 
rate of the aac-part of the bitstream, which is half the sampling rate 
of the original input file. Sample cmdline:
"adif2mp4 -s 22050 -b 48000 -bi 48000 -p LC -o mp4 -k 1 -q 0 blafasl.aac 
blafasl.mp4" if input.wav had 44100 sampling rate.
Regards,
Andreas
Dattaguru B.N wrote:
> Hi,
> 
> I am working on SBR Decoder.  For which, I want to generate some of the
> SBR (HEAAC) mp4 bitstreams.  Can anybody, let me know
> 1. the procedure for encoding the bit stream using ISO SBR encoder.
> 2. the procedure for converting the raw bit stream generated using encoder
>    to mp4 format (HE-AAC).
> 
> Rgds
> Datta
> 
> This message is free from Virus - IMSS
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> NOTE: Please use clear subject lines for your posts. Include [audio, [video], [systems], [general] or another apppropriate identifier to indicate the type of question you have.
> 
> Note: Conduct on the mailing list is subject to the Antitrust guidelines found at http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php

-- 
_______________________________________________________________________
Andreas Schneider                  |
Research Engineer                  | Coding Technologies
                                    |
phone: +49 (0) 911 92891 -26       | Deutschherrnstr. 15-19
fax:   +49 (0) 911 92891 -99       | 90429 Nuernberg, Germany
mailto:snd CodingTechnologies.com  | http://www.CodingTechnologies.com