Why is VDub so slow?

[mwkurt]

Hello,

I am working on a 2hr 15 minute avi file that I captured and have edited out the commercials using Virtualdub. I then set audio and video to "direct stream copy" and saved to a file. This was last night at about 7:30pm est. When it started it was chugging at about 8 to 9 fps. A half hour ago it was only at 71% finished and working at less than 2 fps. I haven't had any other applications running to take away cpu resources. Has anyone else experienced a severe slowdown using Vdub in direct stream mode? Are there any fixes for this. I admit I don't have the fastest pc, my cpu is an AMD 2700. I have 1.5 GB of ram. any thoughts?
Thanks,
Mark

[Baldrick]

It should basicly just copy the video file to new file.

Tried virtualdubmod or virtualdub-mpeg2? if same problem you might have some problems with your harddrive(s)...

[jagabo]

With highly compressed formats, like Divx and Xvid you should be getting 100's or 1000's of frames per second with both audio and video in direct stream copy mode.

With HuffYUV compressed D1 video you should be getting ~50 frames per second. DV AVI should be at 100+ fps.

With Direct Stream Copy mode the speed is mostly dependent on the speed of your drives.