Steven M. Schultz wrote: > On Fri, 7 Jul 2006, [UTF-8] Bernhard Frühmesser wrote: > > >>> They are median filters. The -m is applied BEFORE the -t. The -M >>> is applied after the -t. >> >>So they can be useful for what type of video? > > > "impulse noise" - small dots or specks in the picture. I've used > a small radius medianfilter on very noisy video. I know that with > 'yuvmedianfilter' you can specify the radius with -r and -R (for luma > and chroma respectively). "-r 2" is the default and is slower (and will > tend to soften the image more - but for noisy video this might be what > is desired!), "-r 1" is a lot faster and leaves more detail. > > Combining the medianfitler with the unsharp filter can greatly > improve the visual appearance of the video. It's the same technique > used with still images: blur and then sharpen. > > I do not think that yuvdenoise allows the specification of the radius > used with -m or -M.
I see. Hmm, might me usefull for really old source matterial. >>I played around a bit with the video using the filters and then yuvplay >>at the end and not mpeg2enc and i realized that these "painted effects" ... > > >>create the video file i have these "painted effects", on my old box i >>have version 1.8.0 of mjpegtools installed and i did exactly the same > > >>Exactly the same cmd on the old box didn´t produce these "painted >>effects" in the video. > > > So on your new box you are using a newer (cvs?) version? And on the > old/other system you're using 1.8? Yep, on my "oldest" box i still have version 1.6.2 installed on the "old" box 1.8.0 and cvs on the new box, i like to keep older version a bit longer just in case... And with that i can compare things. And someone said: "Never change a running system" :-) >>Some bug in mpeg2enc maybe? > > > Possible. There have been some major changes made - possible that > bugs have been introduced. I haven't done much encoding with the > current CVS version of mpeg2enc - I'm waiting for Andrew to give the > "it's working better" signal ;) Hmm, i´ll play around a bit with it, maybe it´s just some kind of "setting-thingie" :-) Cheers, BF. > Cheers, > Steven Schultz Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Mjpeg-users mailing list Mjpeg-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mjpeg-users
