[Ffmpeg-devel] [PATCH] vbr audio encode

Justin Ruggles jruggle
Tue Aug 23 16:03:09 CEST 2005

Michael Niedermayer wrote:
> applied

great! i like the changes too.

so, now that ogg is fixed, might as well update the vorbis codec as
well.  since the aq value is passed directly to libvorbisenc, it uses
-0.1 to 1.0 instead of -1 to 10 like oggenc.  apparently fixed-quality
vbr encoding in vorbis doesn't have to save up audio samples to analyze
before sending out vorbis packets, so the encoding is faster & looks
nicer too (no "time=100000000000.0").  with an 18-second test clip, my
(slow) computer took 1m30s with abr and only 30s with vbr.  both results
had very close average bitrates.

patch attached.  also updated vorbis time base.

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