Hallo Robert Valliant wrote: > May I ask another question? Yes :)
> The man page for ppmtoy4m says: > > -S mode > Set chroma subsampling mode. (default: 444) > 444 - 4:4:4 (no subsampling) > 420jpeg - 4:2:0 JPEG/MPEG-1, interstitial cositing > 420mpeg2 - 4:2:0 MPEG-2, horizontal cositing > > The subsampled modes use a lousy subsampling filter; better > results will be achieved by passing > the default 4:4:4 output to a scaler which supports > subsampling, such as y4mscaler(1). > > Yet y4mscaler is not in the mjpegtools project. I'm nor sure any more but y4mscaler was programmed by Matthew Marjanovic. He did a lot for the mjpegtools project but he did never put y4mscaler into the mjpegtools project. So I/we did never distribute the y4mscaler with the mjpegtools or include it to the CVS. > Did the ppmtoy4m '-S option' improve so that y4mscaler is no longer > necessary? unlikely ;) > Is there another reason? If you mean not including y4mscaler. I think the program is a projects close to the mjpegtools. And is not included like a other tools people wrote you find on the mjpeg.sf.net > I ask because I am having compile problems with y4mscaler. Sigh..... > I should really learn what I am doing shouldn't I? If it is just a compiling problem you can post the steps you have done on this mailinglist. Someone should have an idea. auf hoffentlich bald, Berni the Chaos of Woodquarter Email: shadowl...@utanet.at www: http://www.lysator.liu.se/~gz/bernhard ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Mjpeg-users mailing list Mjpeg-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mjpeg-users
