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Re: How to configure AudioConverter to write VBR?
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Re: How to configure AudioConverter to write VBR?


  • Subject: Re: How to configure AudioConverter to write VBR?
  • From: Brad Ford <email@hidden>
  • Date: Thu, 12 Feb 2009 00:57:16 -0800


On Feb 11, 2009, at 7:37 PM, Jens Alfke wrote:


On Feb 11, 2009, at 6:33 PM, William Stewart wrote:

yes - this is how the QT dialog in export does this.

I don't suppose it's possible to call QT just to run this dialog, but then just grab the parameters out of it and do the encoding using my own CA-based code?

You can indeed do that. That's one of its intended uses. It publishes a lot of properties from which you could construct your own encode AudioConverter. You can also use it as a "fancier" AudioConverter -- one that does mixing if necessary. It has an identical interface to AudioConverterFillComplexBuffer (SCAudioFillBuffer). You could also run the dialog once and get a binary blob of settings from it, stash it away in your bundle, then make a new SCAudio instance sometime in the future, set the blob on it, and away you go with a properly configured decode/encode.


I presume you've taken a look at the scaudiocompress sample code?

-Brad Ford
QuickTime Engineering
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  • Follow-Ups:
    • Re: How to configure AudioConverter to write VBR?
      • From: Jens Alfke <email@hidden>
References: 
 >How to configure AudioConverter to write VBR? (From: Jens Alfke <email@hidden>)
 >Re: How to configure AudioConverter to write VBR? (From: Stephen Davis <email@hidden>)
 >Re: How to configure AudioConverter to write VBR? (From: Jens Alfke <email@hidden>)
 >Re: How to configure AudioConverter to write VBR? (From: Jens Alfke <email@hidden>)
 >Re: How to configure AudioConverter to write VBR? (From: William Stewart <email@hidden>)
 >Re: How to configure AudioConverter to write VBR? (From: Jens Alfke <email@hidden>)
 >Re: How to configure AudioConverter to write VBR? (From: William Stewart <email@hidden>)
 >Re: How to configure AudioConverter to write VBR? (From: Jens Alfke <email@hidden>)

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