capturing uncompressed video

[taz291819]

I'm using an ATI AIW 9700 Pro w/VirtualDub to capture some Directv. My settings are 44.1 audio, 29.97fps, 740x480. If I use the PIC MJPEG codec set at 20, I get no dropped frames and system resources around 35-40%. I can then play these back directly using zoom player and bsplayer just fine. But when I try to capture with the same settings, but UNCOMPRESSED, I still get no dropped frames and system resources around 20%. BUT, when I try to play the file back in zoom or bsplayer, the audio is fine, but the video plays like it is at about 20fps (kinda like time lapse recording). Is it supposed to do that? Do I need to encode the files before trying to play them back? I planning capturing a show tonight and want the best quality so I can encode it to dvd complaint mpeg-2 and burn it to dvd. The show is 90 min so I have enough HDD space. Any help would be appreciated. My specs:

P4 2.4Gz
512Mb DDR
120Gb HDD (80 and 40)
ATI AIW 9700 Pro

[Boulder]

Well, if you want the best possible quality source, use HuffYUV for compression. It's lossless so you'll lose no details.

[^^-+I4004+-^^]

it's ok not to be able to watch it........
you have to encode first.......

your graphics card is probably choking with uncompressed video..that's normal...it will probably choke with huffyuv playback too,but decide if you want to watch uncompressed video (120GB is still to small for that) or make best possible source and then compress later...
off course you want latter so use mjpeg or huff....(as huff still compresses to keep files smaller than uncompressed...but compresses in lossless way...)
or if you think you have space enough you can use uncompresed video as a source too..........
i think you don't have space enough (unless you love some really short shows..hehe)