Florin Andrei wrote: > > For a number of years, I had an annoying problem with my home-made > videos: After less than a minute of playing, the image starts to > stutter. This is a bit like the stutter due to panning, only continuous > and much worse. It's like the player is skipping every other frame or > so. It starts abruptly and it doesn't seem to stop. All fluidity of > motion is lost, the movie looks like an old Charlie Chaplin thing > (though the speed of the motion remains correct). > > The only "cure" is to stop / start the player. Also, if I author the DVD > in such a way as to put a small gap between chapters (which is what I > always do) instead of having seamless chapters, the stutter is "healed" > when a new chapter begins, only to start again 10 ... 60 seconds later.
I got an HD screen, with a PS3 as a media player hooked up to it. I'm comparing the new rig to the old one, the way my home-made movies are reproduced. For the average user, it probably looks flawless. But I'm a nitpicker, so when looking closely to the flow of video, I noticed that the motion "stumbles" for an instant on the new rig (PS3 + plasma), around the same places where the old DVD player would start stuttering. However, the PS3 obviously recovers from whatever happens and overall the motion is fluid. There's definitely a problem with the movies. The problem exists when encoding with mpeg2enc, it does not exist when encoding with HCenc. I guess I should try to rip one of the old DVDs and re-master it. Actually, remux it with something else than mplex, and remaster it with something else than dvdauthor. While I'm still using mplex and dvdauthor when encoding with HCenc, I would not lay the blame 100% on mpeg2enc. Maybe it's an interaction between the tools. In any case, on the PS3, the effect is very subtle. I guess 99% of people would never notice by themselves, and many may not be able to discern the problem on the PS3 even if told what to look for. -- Florin Andrei http://florin.myip.org/ ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Mjpeg-users mailing list Mjpeg-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mjpeg-users
