[mythtv] PATCH: More deinterlacing support.
richard at earthmen.com
Tue Mar 25 07:59:53 EST 2003
On Tue, 2003-03-25 at 07:45, Torbjörn Jansson wrote:
> > In the windows world "DScaler"
> > (http://deinterlace.sourceforge.net) is widely > acknowleged to
> > be one of the best quality viewers (visual quality that is,
> > program itself is horrible).
> > You might take a look there for inspiration. They have a
> > couple of clever algorithms to detect which sort of
> > de-interlace works best for different situations (video, live
> > tv, etc). Also, the denoise filters would be a fantastic
> > "nice-to-have", and would probably really boost compression
> > ratios as well
> I think i remeber that there was some discussion on the dscaler mailing list
> some time ago about portin to linux.
> I searched the mailing list and found this link:
> http://tvtime.sourceforge.net/ it looks like someone already has ported some
> of dscalers plugins to linux so maybe thers some code in there that can be
> (i know that parts of the code in dscaler is not the best, and the gui coud
> use some rework)
tvtime provides excellent quality, unforunately the code is not directly reusable
as mythtv uses a different colour space (yuv420P/yv12) to that used in tvtime (yuv422).
If rtjpeg and mpeg4 both took yuv422 directly or if yuv420P<->yuv422 conversions were
not too costly then it would probably be feasible to re-use the code directly.
Going with yuv422 also preserves more colour information although, the reason mythtv
probably uses yuv420 though is probably its widespread use as the input to most
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