Roman Haefeli(e)k dio: > > > On Mon, 2008-06-09 at 11:57 +0200, altern wrote: >> Hi >> >> I am using 3gp video with GEM on windows and linux. Under windows XP on >> some machines pix_film does not return the right video length in frames, >> it returns 1, testing with same video and patches in another machine >> returns the right length. Does this sound like some Windows issue? maybe >> some codec that needs to be installed? I need to find a format for video >> that works fine crossplatform. > > i don't think, that it's the best idea to use a format like 3gp for use > with Gem. the goals of the 3gp format and working with video in Gem > usually are quite different: 3gp is meant to be a suitable videoformat > for small devices with only low resolution and high compression (it uses > mainly h.263 and h.264 as video codecs), whereas usually with Gem file > size is less important than for instance a fast codec and easy random > access to frames. codecs with highly optimized compression usually work > only when playing forward at single speed because of certain frametypes > that rely on previous and future frames (interframe compression). i > think it is best to not use such a codec when used in Gem, but rather an > intraframe compression based codec, whereas each frame is compressed > separately. from my experience the quicktime mov format with mjpeg > (motion jpeg) works quite well and doesn't have too much cpu overhead. > probably other people have other suggestions. on windows, avi format > with dv codec might be running well (so you don't need to install > quicktime).
thanks for the tips! i dont know much about video compressions so it is very useful. enrike _______________________________________________ [email protected] mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
