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
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