Trying to avoid deinterlacing to CRT TV

[congoblue]

Hello everyone

I have just built a media pc using the Asus M2NPV-VM board, which has Nvidia 6150 graphics on board. I am outputting to a standard-def CRT television using the YUV/component outputs. (50Hz/Pal tv).

I've had a lot of problems getting Live TV to display without jerkiness, but finally I think that is OK. (Purevideo decoder with hardware acceleration switched off, to VMR9, seems to be the answer. Any other setting gives a missed frame about every half a second for some reason).

However the TV picture is being deinterlaced somewhere along the line, which makes everything look like film. It causes problems with horizontal scrolling credits/tickers and fast camera pans. Does anyone know what settings I should use to keep the picture interlaced? The Purevideo decoder does not have settings for "do not deinterlace". The graphics card is set to 720x576, interlaced output @ 50 Hz. I'm not sure if GBPVR's "Deinterlace" setting on the Misc config screen has any effect here, I've tried all the settings and they all look the same.

I do have the "flicker reduction" on the graphics card config set on the first click (not zero), I am just wondering now if this is causing it.

[csy]

'weave' deinterlacing method means no-deinterlacing, and Purevideo decoder refers to this a 'combine fields'

[nj2112]

Combine fields is one of the Purevideo decoders deinterlace modes. It combines two fields to produce a frame, refered to as blend in some other decoders.

Setting the Purevideo Deinterlace control to 'Film' disables deinterlacing. But, congoblue, you don't want to do that, you have to deinterlace with current Nvidia hardware unlike older Nvida cards.

Try setting the deinterlace mode to Vertical stretch or display fields separately. You might find this gives more acceptable results.

[csy]

nj2112 is correct.

My earlier post was rushed without fully thinking it through. Sorry for the confusion.

[congoblue]

I've now tried every option on the Purevideo decoder and it's deinterlaced no matter what I do.

I'm not sure what nj2112 means by "you have to deinterlace with current Nvidia hardware". I know GBPVR can display it interlaced, because if I use the Cyberlink decoder set to "Force Weave" then it displays it interlaced. Everything stops looking like it was shot on film and it goes back to looking like normal TV with smooth pans and smooth graphics scrolls/tickers etc.

But, the picture is sometimes "stoppy" with this decoder. VMR9 (rather than VMR9-custom) works the best, but if the aspect ratio of the TV picture is not 16:9 the picture shrinks to the corner of the screen displaying hash everywhere else (I know this problem is discussed elsewhere).

I also don't understand why selecting "hardware acceleration" makes the picture more jerky for both Purevideo and Cyberlink. My "stoppy" picture problem is presumably not related to cpu power (cpu is at about 30%) but something else, I am not sure what.

Thanks for all help so far.