From: Ronald B. <rb...@ro...> - 2001-06-10 12:03:43
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Hi Yann, >> JPEG-videos I've seen). Our quicktime JPEG-support is based on >> Adam's QT-lib, we could modify that to use the 3ivx one you guys >> use. But does this sound like a good idea or would you rather see >> one plugin for movtar, one for JPEG-AVI (unless you prefer the one >> you already have) and then we'd probably drop quicktime because >> 3ivx' codec does that already? > >Sorry, I don't understand everything here ... But as far as I know >avi, quicktime, and movtar are simply some kind of muxer, and so >independant from any codecs ... Yes, I know, I specifically mean that JPEG-codecs, which can be used for Quicktime (M)JPEG, AVI (M)JPEG and movtar which only can do JPEG anyway :-). But as far as I know the AVI demuxer doesn't work very well (last time I tested it the results were ugly) and there's no movtar demuxer at all. I never tested the quicktime demuxer at all so I don't know how well it can handle movies produced with Adam William's quicktime4linux codec. >If you want to write some kind of hardware accelerated MJPEG codec, >you should only write one version of this codec. This plugin should >then be used by the avi, quicktime and movtar muxer plugins ... Hardware-accelerated codecs will come later. This is about software-codecs. All the three formats are based on libjpeg. So I should write a 'lav-demuxer' (or a movtar-demuxer and check the AVI/QT demuxers on how well they can handle our movies) which grabs the JPEG frames which can then be deocded by a JPEG-decoder? Ronald |