[theora] No quality advantage with two-pass?
dvdkhlng at gmx.de
Sat Aug 29 13:23:38 PDT 2009
>>>>> "Remco" == Remco <remco47 at gmail.com> writes:
> The ffmpeg2theora chapter of the Theora Cookbook says that the only
> advantage of two-pass encoding is that you can hit a specific target
> size. But isn't it so that you can reserve bits for difficult parts of
> a video, which improves the perceived quality?
Why would it have to reserve bits, if you specified a constant target
quality for encoding? It just takes as much bits as are needed to hit
the configured quality. In "difficult parts" it will just naturally use
> Theora does quite alright without two passes, but it seems like a
> no-brainer to me that two passes will always be better.
You mean, because it takes twice as long to encode?
Disclaimer: I wrote that part of the Cookbook :). If I'm really wrong,
just fix that part, floss-manuals works like a wiki.
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