FYI: Video scopes slow down RAM render

smhontz wrote on 8/20/2004, 8:46 AM
I have a dual-monitor setup. I like to put the timeline in one monitor, and the preview window and video scopes (ALL) in the other. I've stretched the video scopes to be quite large so I can see them better.

I found out that even if the video scopes are set with "Update Scopes While Playing" to OFF, RAM render still updates the scopes, and slows down the render. (It's kinda neat to watch the scopes while the render is in progress, but it would be nice if they didn't unless you had the button ON).

Here's the findings for a typical RAM render of a 34 second timeline chunk:

33 secs - no video scopes displayed

40 secs - video scopes small, tabbed with video preview window in main timeline window, either showing or not, "Update Scopes While Playing" either ON or OFF, time was about the same

1:07 - video scopes open in another monitor, large size, didn't matter whether "Update Scopes While Playing" was off or on.

As you can see, there's a performance penalty for merely having the scopes open while doing a RAM render.

Comments

Spot|DSE wrote on 8/20/2004, 9:16 AM
The scopes will also provide a hit on the playback of video from the timeline, and on a slower system will cause dropped frames. That's one of the hits of live scopes...
busterkeaton wrote on 8/20/2004, 12:12 PM
Also if you the bigger you have the scopes the more of hit you will take. Showing one scope is less of hit than showing all.
smhontz wrote on 8/20/2004, 12:30 PM
Yeah, I just didn't expect that the scopes would impact when "Update while playing" was OFF. That means for optimal performance, I have to close them when I want to do RAM renders. Shame.