problem with Sony Vegas 4 crossfades

[silvyr]

Ok, so I am importing a movie (.avi) into sony vegas for editing. Everything works fine, but when I try to do a crossfade, it gets incredibly laggy, choppy and nearly impossible to even watch the transition to see if it's timed right. When I seperate the clips and stick them one next to another without fading, they both play just fine, it's just the crossfades that are giving me trouble. Can anyone help me? Oh yes I am using sony vegas 4. (sorry it's all I got atm)

thanx

[poisondeathray]

I'm on a different Vegas version, but can you try lowering the preview quality. i.e. instead of best(full) , try half /quarter or draft mode. This might help playback on older pc's - you didn't list your PC specs but I suspect it's older

Also what kind of avi ? use mediainfo if you don't know. If it's uncompressed or some high bitrate lossless compression then real time playback should be difficult, especially on older systems.

[guns1inger]

Vegas 4 doesn't use GPU for previews, so it is reliant only on the CPU for previews. You haven't filled in your computer specs with anything useful, so I can't tell you if that is the cause or not. If reducing the quality of the preview helps then you know your machine is simply not up the task.

Later version of Vegas (6 onwards) are better optimised for real-time preview of effects, so you might consider some major upgrades.

Also, Vegas works best with DV, which has a relatively low CPU overhead.