100 CPU usage

Sonisfear wrote on 3/12/2006, 6:15 PM

Make sure that Vegas is using 100% CPU usage when rendering in your task manager.

My CPU usage was cycling between 5% and 90%.

I turn my dynamic RAM preview to 40 MB from 750MB and now I am getting 100% CPU usage during render.

Comments

fldave wrote on 3/13/2006, 3:34 PM

I don't believe that CPU % is a good guage of efficient rendering/encoding. Maybe with WMV but definitely not MPEG. The ultimate test is how long did the render take to completion? If you missed my previous posts, there is a problem with Vegas rendering to MPG with Dynamic RAM setting >0 and < 128:

http://www.visualretreat.com/vegas/2005_V5V6_Compare.htm

As pointed out there, there is something else going on unnecessarily when ram is >0 and < 128.

I tried your settings, plus my now favorite 128MB on my render testing veg:

750MB - 46 minutes 33 seconds
128MB - 44 minutes 06 seconds
40MB - 1 hour 34 minutes 51 seconds

The 750 setting rapidly ran the page file up to 1GB under task monitor, resulting in a lot of CPU bouncing between 0% and 90% as you reported. But it very shortly stabilized to 88%-96%. Both of the other RAM settings also performed in that range. Again, this was with MPG output.

Several people have reported render time improvements when they switch from 16MB and 64MB to 0 or > 128.

johnmeyer wrote on 3/13/2006, 6:37 PM

Are you doing your test with 6.0d, or with an earlier version?

fldave wrote on 3/13/2006, 7:14 PM

John,

The page shows my comparisons between Vegas V5, V6c and now V6d. Updated a few weeks ago. Same machine, same veg.

Here's the link in an actual hyperlink!

Sonisfear wrote on 3/14/2006, 12:56 PM

Great info

I have been testing on WMVHD and M2T files because I am a HD guy. But I did notice that a 5 minute WMV rendered faster than a MPG with these settings I didn't realize that the type of file made a difference.

To Vegas developers
Is there away that Vegas 6 could do a render analysis vefore it starts chugging to automaticly figure out the settings for the fastest render bassed on the amount of ram present, the type of plug and the amount of available cpu or threads?

Some of this info could be asked when installing Vegas on the PC

Sonisfear wrote on 3/14/2006, 12:57 PM

BTW FLDAVE:

My system would cycle up and down from beginnning to end of render.

Maybe I should do a chart and scientific test of various settings.