The VideoLAN Forums

Does the VLC player support hardware acceleration (DirectX graphics card) in DVD movie playback? I don't see an option for it anywhere in the settings. If so, is it best to disable the deinterlace setting in the VLC Player?

AFAIK hardware acceleration is not supported.

Thanks. That explains why I don't notice any difference in PQ when I make deinterlace mode changes in my ATI Radeon 3870 graphics card.; but, it doesn't explain why the default setting in the VLC player is deinterlace "disabled" rather than overlay or some other deinterlace option. What are the best deinterlacing settings to use in VLC player for comercial DVD movie playback?

The default deinterlace has to be default, because most of the movies are not interlaced...
Are you sure you don't mistake with Overlay or postprocessing ?

Overlay is by default activated, so some hardware acceleration is supported.

I agree with you that deinterlace should be enabled by default, but mine was disabled as I said earlier. I will now enable deinterlacing.

I thought that overlay was a mode of deinterlacing. What I want to avoid is having VLC do the delinterlacing if my video card is also doing it, as that could produce a bad result. If my video card is not performing any hardware acceleration when using the VLC player, then there is no problem. However, it there is some hardware acceleration going on at the same time, then I don't want both VLC and my ATI card do be deinterlacing.

I agree with you that deinterlace should be enabled by default, but mine was disabled as I said earlier. I will now enable deinterlacing.

I thought that overlay was a mode of deinterlacing. What I want to avoid is having VLC do the delinterlacing if my video card is also doing it, as that could produce a bad result. If my video card is not performing any hardware acceleration when using the VLC player, then there is no problem. However, it there is some hardware acceleration going on at the same time, then I don't want both VLC and my ATI card do be deinterlacing.

No, I said that deinterlacing HAD to be disabled by default.
I think you don't know what deinterlacing is... Look on wikipedia.
Video cards don't do deinterlacing, they do overlay... And VLC uses overlay.

However, you can activate postprocessing, if you want.

all i want is only to play it smoothly,since i don`t understand all you explained.

Modern videocards can do hardware Deinterlacing http://en.wikipedia.org/wiki/DXVA#Overview But ATM VLC doesn't support it. Default playback in VLC should be okay for most of people, by smooth you mean that picture looks smooth or framerate is smooth (aka no stops, lagging, shutter etc)?

OK, we are starting to get somewhere now. So, when playing a DVD movie using VLC player, I should do the following: (1) for deinterlace mode in my ATI 3870 video card select the deinterlacing mode that lets the player (VLC in our instant case) select the deinterlacing scheme (i.e. auto-detect) since VLC player does not like (support) hardware acceleration; and (2) enable deinterlace in the VLC player as it is disabled by default; and (3) select a deinterlaces method (i.e. Blend) in the VLC player; and (4) guess at which of the image filtering options (postprocessing) works best for commercial DVD movie playback. Is this a correct outline for the best DVD movie playback (Image quality) using the VLC player?

If you see problems caused by poor interlacing http://www.gisdevelopment.net/technolog ... paul_1.jpg something like that, then change settings. For DVD material there should be automatic method for that so postprocessing is only option you need to change.

Thanks for the help