On Wed, 2007-10-31 at 03:29 +0100, Roman Haefeli wrote: > On Tue, 2007-10-30 at 13:38 +0100, Thomas Mayer wrote: > > > Maybe the video is corrupt, have you tried transcoding the video with > > mencoder or transcode? > > > > Try > > > > $ mencoder -ovc xvid -xvidencopts bitrate=800 -oac copy -o train.avi > > train.mov > > > > and load the film train.avi > > hi thomas > > maybe i missed something, but i don't quite see why you are suggesting > to reencode the movie to avi-container with xvid codec. usually it is a > bad thing to do, because xvid codec, that is quite heavy cpu-wise to > decode (ok, on decent computers it is not that much an issue anymore), > and - what is much more important - it is a so called interframe codec, > which means, that many frames are dependent on each other. this > basically means, that the codec is optimized to be played only forward > and at 1x speed. playing at a different speed or backwards can either > produce funny artefacts or not work at all. usually when using a video > in gem, having high flexibility and low cpu cost is much more important > than small file size. that is why so called intraframe codecs are rather > recommended for this kind of task. 'intraframe' means, that each frame > is encoded separately, which makes it very easy to access and render > random frames. i think most supported intraframe codecs are 'jpeg', > 'mjpeg' and 'dv'. > yo, i am not very much an expert in this field, so i might be not very > precise in everything, but i hope i could give some idea, why generally > you rather not want xvid as movie codec to be used in gem (although you > are especially looking for funny effects).
argh, sorry for my english. i wanted to say: excepting you are looking for funny effects. roman ___________________________________________________________ Der frühe Vogel fängt den Wurm. Hier gelangen Sie zum neuen Yahoo! Mail: http://mail.yahoo.de
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