DVDx - high performance by using it twice or three times

[medicus]

Hi there!

for example: When I encode a 2hr movie to VCD I open the program twice, always the same settings but first I start at the beginning of the film, and second time at about 1hr (because needs 2 CD's);

When I use DVDx only one time I get around 8,5 fps, by using both
at the same time I receive about 6,5 on each...so 13 fps:...?????

How can that be - is it because of the algorythm?

[medicus]

Sorry....it's me again...
Has nobody of you an answer to this question?

[Alan69]

If you can't figure the reason why, then of course you need to be following time tested logic:

Yours is not to reason why, your butt should just do it, like Nike says.

Clearly processing power wasn't the bottleneck for a single instance doing only 10 fps, and overlapping two processes made the total disc access more efficient and let the two processes use more of that processing power that was going idle. Most Windows programs are abysmal at caching things, so it's not even that uncommon or surprising. Two instances running tends to make it have two seperate caches to work with and can do more work in the same time working twice from memory instead of waiting to read in more from the disc for a single process.. If the program was running at optimum with a single instance it'd be slightly faster, but clearly it's waiting on other parts of the OS and hardware, almost always the hard drive.

Alan

[RabidDog]

check your processor useage and try running maybe a third and even fourth instance till you get 100% processor usage then check you Fps on each program..just be grateful too