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Conversion to 3gp
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Conversion to 3gp


  • Subject: Conversion to 3gp
  • From: Norman Franke <email@hidden>
  • Date: Thu, 19 Jul 2007 13:14:48 -0700

I'm attempting to convert a custom ADPCM format to 3GP / AMR for streaming to an iPhone. I need to do this without a GUI, basically, pass it a buffer of samples and get a .3gp file as output. I'd prefer to do this without an intermediate file.

I've looked at the same code on apple.com (under QuickTime), most of which is quite out of date. None seem to do this without a GUI and/or file IO.

I had some old code that uses SoundConverter to convert to PureVoice, but I had to hard code the compression params (magic cookie).

How do I specify both the media type AMR and file type (3gp), get the magic cookie/compression params and the like?

Is the the wrong way to go?

-Norman

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