Hello. Yesterday I have sugested (see below) the inclusion of y4mscaler as an optional scaler in the encode2mpeg program:
http://encode2mpeg.sourceforge.net/encode2mpeg.html encode2mpeg is a front end to MPlayer/MEncoder and mjpegtools. It is able to convert any kind of video that mplayer can play in a format suitable for VCD/SVCD/DVD, plus it can create DivX avi. Then it was asked what improvements y4mscaler would bring when compared with the BICUBIC scaler of yuvscaler (see below again). As I am not prepared to give such explanation, I am forwarding the message to the mjpeg-users mailing list so that someone with more knowledge of the subject could provide an explanation. Reference: http://mplayerhq.hu/pipermail/mplayer-users/2005-February/051208.html Regards. Romildo ----- On Tue, Feb 01, 2005 at 09:33:25PM -0200, [EMAIL PROTECTED] wrote: > > Let me sugest to the author of encode2mpeg the > use of y4mscaler as an optional scaler for the > mpeg stream. > > Its home page is > http://www.mir.com/DMG/Software/y4mscaler.html > > It is a very good video scaler which operates on > YUV4MPEG2 streams, as used by the tools in the > MJPEGtools project. > > y4mscaler and yuvscaler are compared in a thread > in the mjpeg-users mailing list: > http://sourceforge.net/mailarchive/message.php?msg_id=6883437 I have checked quickly the home page of y4mscaler and the thread in the mjpeg-users mailing list. The only reason I see to use y4mscaler instead of yuvscaler would be because y4mscaler has more scaling engines. Is it just that or did I miss something? My question is: how much better it would be to use a better scaler of y4mscaler compared with the BICUBIC scaler of yuvscaler? And how can I measure the improvement? (With MEncoder I can test different scalers and check the PSNR for the best result). If you need many kind of sowtware scalers you can already use Mpeg Mode and choose between the 10 scalers of mencoder. Giacomo ------------------------------------------------------- This SF.Net email is sponsored by: IntelliVIEW -- Interactive Reporting Tool for open source databases. Create drag-&-drop reports. Save time by over 75%! Publish reports on the web. Export to DOC, XLS, RTF, etc. Download a FREE copy at http://www.intelliview.com/go/osdn_nl _______________________________________________ Mjpeg-users mailing list Mjpeg-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mjpeg-users
