John, Ian, patch looks great; before I let mplayer do the scaling as imho it did a better job but with this patch it's at least up to par. So that's another big step forward :-)
N. On 7/25/05, John Harvey <[EMAIL PROTECTED]> wrote: > Here is a patch from Ian to fix the yuv scaling issues. This mostly now > enables a filter to improve the quality. > I'm still working on the tearing problem and don't expect to have anything > for that until the end of the week. > > Comments from Ian are :- > > Both horizontal & vertical filters are calculated & set correctly. They are > also restored on exit. The filter settings cannot be overridden by the user, > though it wouldn't be too difficult to add later. > > Reg2964 is now used correctly... sort of... The correct value is worked out, > but it affects vertical alignment with the display window, so the result is > manipulated to maintain alignment. Also, it induces flicker with lower res > video so I've deviated from the firmware to try and reduce flicker, meaning > video down to 288 (240-NTSC) high now can be watched full-screen without > nausea inducing flicker. > > Reg2970 no longer used to disable vertical filter as it had other > side-effects, but it's set to 0 to ensure we get the right results > elsewhere. > I've never yet seen it change from 0, but you never know. > > Video less than one field high is now handled differently which greatly > reduces flicker. Downside is that it renders the current vertical filter > settings useless, so they get switched off in this mode which then causes > the vertical pixelation to become visible. Choose your poison. > > It wouldn't be difficult to allow the user to select which scaling method > they prefer for the low-res material. At the moment it's simply a check on > the source & destination height to enable to new 'lo-res' mode > (y_lores_mode). > The low-res material can still be scaled using the normal method, which > matches the way the firmware works. In fact if you try to shrink the image > too much it has to switch back to the normal scaling mode anyway. > > > ------------------------------------------------------- SF.Net email is sponsored by: Discover Easy Linux Migration Strategies from IBM. Find simple to follow Roadmaps, straightforward articles, informative Webcasts and more! Get everything you need to get up to speed, fast. http://ads.osdn.com/?ad_idt77&alloc_id492&op=click _______________________________________________ ivtv-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ivtv-devel
