fullscreen playback resolution

[jkwarras]

Hi,

Just wondering if anyone knows what are the benefits of playback divx/xvid encodes at 640*xxx or lower in a fullscreen resolution of 800*xxx or 720*xxx or 640*xxx, and changing the dpp to 16 pixels, instead of the normal 1024*xxx monitor resolution.

You can do it with player like bsplayer or media player classic. I found myself that playing encodes with small resolution like 320*xxx (like friends or other TV shows) in smaller fullscreen resolution at 16 bpp (i don't think is that term exactly but i think you know what i mean: less colors are displayed or maybe i'm just wrong and forgive me :)), but the difference is just not really that much for me, so i wanted to know if someone would share his experience with this playback feature, and if it really help things to look better, or is just useless.

Ivan

[Lobuz]

For me it's a noticable difference. It depends of the grafics card and the quality of its resizing(ATI is better then Geforce). In the original resolution there are no additional artifacts from rescaling. And with smaller resolutions like 320x* I use ds bicubic filter. There are rescaling options in ffdshow too and with fast cpu there are really high quality filters. And I prefer VMR7 or 9 mode then normal overlay. It have higher quality but is a little slower.

Regard
Lobuz

[avih]

iirc, the color depth (16/24/32 bpp) doesn't matter if you use overlay, since the overlay is yv12/yuy2 (iirc) which is independant of the desktop bpp.

[jkwarras]

I think you're talking about rescaling a smaller video into fullscreen, as you cand o with ffdshow or whatever dsfilter or player. I was talking about the effect of changing the fullscreen desktop resolution. Normally there's a 1024*7xx resolution, and you can change for example in MPC or BSplayer to 800*600 or 640*xxx and go on, you can even set a resolution of 720*576 wich is a PAL TV resolution i think. In other discussions people said that changing the desktop resolution doesn't have much effect but other said just the opposite, that artifacts doesn't get amplified. Personally i thnk that changing desktop resolution while fullscreen playback of a 512*xxx movie to 640*480 helps a little because you movie don't have to get so bigger that with a resolution of 1024*xxx.