Hallo > >> the CVS version of MJPEG tools. Where should the 'yuvfps' utility fall > >> in the YUV filter chain ? > >> > >> yuvfps -> yuvmedian -> yuvdenoise -> yuvscaler > >> > >> or > >> > >> yuvmedian -> yuvdenoise -> yuvscaler -> yuvfps > > > >I would use: ... -> yuvfps -> yuvdenoise -> yuvscaler -> ... > > > >You usually do not need yuvmedianfilter any more. > >yuvdenoise checks the differnence between the frames, so you should have > >the needed frame rate before you change the frame rate. The scaler can > >come at laste because it introduces no noise. > Er, shouldn't yuvfps come after yuvdenoise? Not yet tested myselfe -> no real experinece. Seems that I will have to test it tomorrow.
> In the "increasing framerate" case, yuvfps is simply duplicating frames. > If yuvdenoise uses interframe differences in its filtering --- i.e. > frame-to-frame changes are part of its noise model --- then duplication > of frames will make noise look like signal. > Conversely, in the "reducing framerate" case, yuvfps drops frames; I imagine > this might enhance the noisiness to yuvdenoise. Because of that I sugesset to use a lower frame rate. From 25FPS PAL to 24FPS or 24000/1001FPS NTSC I thought the changes might not be that visible. Dropping one frame every second. I agree that bringing the framerate up to 30000/1001 will very likely be not that good. > Furthermore, if yuvfps is simply duplicating/dropping whole *frames*, it will > probably give questionable results for interlaced streams. (I've never tried > it myself, though.) > Definitely, any deinterlacing (e.g. via yuvdenoise) should come before yuvfps. I agree for general video, but I think it is less important for VCD PAL. If you (and anyone else) want to do it better please do it. auf hoffentlich bald, Berni the Chaos of Woodquarter Email: [EMAIL PROTECTED] [EMAIL PROTECTED] www: http://www.lysator.liu.se/~gz/bernhard ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _______________________________________________ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
