[Ffmpeg-devel] vbr audio
Wed Aug 10 10:56:45 CEST 2005
On Wed, Aug 10, 2005 at 12:28:18AM -0400, Justin Ruggles wrote:
> OK, so now I feel like I'm posting way too much, but I really need some
> input on this one before I get in too deep. I'm implementing an option
> for ffmpeg that allows encoding vbr audio. My current plan is to use
> '-aq' for audio quality.
> The only oddity is that the scale is not even close to uniform between
> codecs. Should I make a uniform scale unique to FFmpeg or just put in a
> warning that it is codec specific and use bounds checks in each encoder?
> For example, oggenc uses 0 (low) to 10 (high), lame uses 0 (high) to 9
> (low), and faac uses 10 (low) to 500 (high). Is this an issue with
> video codecs as well? If so, how is it handled?
> Also, since most stand-alone audio encoders seem to default to VBR
> rather than a fixed bitrate, I thought I would alter FFmpeg to do the
> same once I get '-aq' up and running.
add both, a unchanged codec scale and a "normalized" one
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