It's frustrating, isn't it!
The CUDA patch has been available for some time now. There must be PD7 users with suitable NVIDIA graphics cards in their pc's, but nobody seems interested in running some simple tests to properly evaluate the effect of CUDA support. I've only read the vaguest references to CUDA usage, generally in the form of complaints that it didn't seem to do much.
I would perform tests myself - but don't have a suitable video card. Since I anticipate upgrading my pc in the near future, I'm very interested in the benefits of CUDA or AVT support.
Certainly from the publicity material that Cyberlink have put out, CUDA should speed up video encoding, and by several times the speed at which even the fastest cpu can do it. It's not clear to me if that speed increase will only be gained when encoding to h.264, or if it will occur when, say, transcoding to mpeg2.
AVT support seems to have even more promise. AMD demonstrated a pc encoding four HD video streams to h.264 in real time. Compare that with a top of the range Intel Quad taking ten hours for a single stream, and you can see the potential benefit.
A glimpse of the performance benefit of CUDA is demonstrated by the otherwise poorly featured "Badaboom" program.
I believe the ATI 4800 series video cards, having many more stream processors than even the latest NVIDIA ones, have greater potential as parallel processors used to offload video encoding from the cpu.
If AVT support is or can be properly implemented, it should change everything. Instead of paying top dollar for the fastest cpu, the optimum system for video editing might comprise a lower-end cpu paired with a mid-range to upper mid-range video card.
There's also the possible additional benefit of having multiple video cards.
The kind of parallel processing that GPU's can perform is well suited to video encoding, which is a relatively simple process readily divided up into smaller "chunks", so you would expect video encoding to be just about the first pc task taken on by video cards.
If it turns out that the benefit is limited to h.264 encoding only, the principal benefit may be to HDV users, if they wish to target their projects to AVCHD. It should also show a benefit to AVCHD users, however, if they are making much use of video filters, transitions, and so on, and anything else that would prevent SVRT from functioning. Of course in that case, however, you need to have a video editing program that actually can edit AVCHD satisfactorily in the first place, and I think we're some way off that at the moment.
This message was edited 1 time. Last update was at Nov 17. 2008 09:08