Help with blocky video

[sealteam2]

I saved a movie from DVD onto my harddrive and converted to avi format. I played it back and alot of the video seems blocky. I checked the frame size and it is 864 x 480. Isn't this a little big? Could this be the cause? Will I be able to fix this with Virtual Dub? I am new to using Virtual dub, so I need some help. Thanks. :thanks:

[tigerman8u]

740x480 is D1 full resolution. The video being blocky is probably using to low of a video bitrate for the resolution. use the resize filter and lower the resolution and use the original ripped dvd for your sourse

[mic]

FWIW... blockiness is normally associated with video compression - the higher the compression, &/or the more movement in a scene, the more this tends to happen.

I have encountered DVDs which showed this sort of artifact themselves. Higher compression levels when you make your avi files could also cause it, and it could also come from whatever methods you used to do the conversion -- there was some resizing going on as std. DVD video is 720 x 480.

Unfortunately the best way to fix it is to start over, reviewing guides as needed. I'm guessing from your frame size that you tried to re-size because of anamorphic, wide screen video on the DVD. V/Dub can handle this very well, but make sure you use the higher quality bicubic methods.