Thoralf Schulze wrote: > hi there, > > cpu usage is going through the roof when ffmpeg > decodes huffyuv-encoded video. > just did a quick test with ffplay: decoding a > huffyuv-video consumes about 18% cpu time, whereas the > very same video encoded with mpeg4 (xvid) only takes > 4%. 320x240 in both cases, p4/2.53ghz. this strikes me > as being odd, since xvid is usually far more demanding > than huffyuv in terms of computing power. > > the ffmpeg version i used is the current gentoo-ebuild > (dated 2006-10-16). Then the problem should be reported to the gentoo package maintainer, not here. Only the latest svn is supported here (not here, actually, on ffmpeg-user). > During the configure run, an "optimize no"-message > flashes by, > which I'm a bit unsure about: does it say > that ffmpeg gets no optimisations at all or does it > refer to ffmpeg not being optimised for size? > Additionally, gcc throws a lot of warning about not > being able to inline code during the make run. See > http://forums.gentoo.org/viewtopic-t-533766.html for > details. > > It would be really cool if someone could shed some > light on this issue ... is the slow decoding of > huffyuvs due to the missing optimisations, or is there > another reason? > > thank you very much, > thoralf. > -- Michel Bardiaux R&D Director T +32 [0] 2 790 29 41 F +32 [0] 2 790 29 02 E mailto:mbardiaux at mediaxim.be Mediaxim NV/SA Vorstlaan 191 Boulevard du Souverain Brussel 1160 Bruxelles http://www.mediaxim.com/
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