Why is playback speed limited to 4x?
by Tim Kostka
on
Jul 4, 2009 at 7:00:03 pm
I'm really just looking for an explanation for why the maximum playback speed is limited to 4x. I understand that a higher speed (if it was possible) would be increasingly more taxing on the cpu to render if resampling was chosen, but it seems to me it would not cause any issues besides that.
Right now I'm re-rendering a bunch to achieve a speedup of 256x or so, which works but it's annoying and it seems like I'm jumping through hoops to circumvent an arbitrary and unnecessary limit put in the software for an unknown-to-me reason.
Re: Why is playback speed limited to 4x? by Mike Kujbida on Jul 4, 2009 at 8:51:40 pm
Place the cursor at the end of the clip, hold down the Ctrl key (the cursor box will now have a ~ under it) and drag it backwards for another 3X increase for a total of 12X.
Repeat as necessary.
Re: Why is playback speed limited to 4x? by John Rofrano on Jul 6, 2009 at 2:12:12 am
Perhaps the developers felt that was adequate for most needs? Maybe that was as fast as the media could be physically scanned on the minimal computer required to run Vegas? Who knows? It has to stop somewhere.
Re: Why is playback speed limited to 4x? by John Rofrano on Jul 5, 2009 at 12:55:42 pm
> Right now I'm re-rendering a bunch to achieve a speedup of 256x or so, which works but it's annoying and it seems like I'm jumping through hoops to circumvent an arbitrary and unnecessary limit put in the software for an unknown-to-me reason.
You could use a script tool like Ultimate S Pro to take a snapshot every 256th frame and import that back as an image sequence. This would require no rendering at all. At 256x you are only using one frame every 8 seconds which is more like time-lapse photography than speeding up a video.
Re: Why is playback speed limited to 4x? by Tim Kostka on Jul 5, 2009 at 7:33:58 pm
Thanks, I didn't know about Ultimate S Pro.
But I actually want the resampling done to cut down on the noise. This particular shot is a timelapse around sunset, looking away from the sun, so there's quite a bit of noise after the sun sets. Ideally each frame in the final movie would be blended evenly from 256 frames in the original movie.
Re: Why is playback speed limited to 4x? by Mike Kujbida on Jul 6, 2009 at 2:14:41 am
Why is playback speed limited to 12x?
That's the limit for Vegas.
You can get more by using Ultimate S as John said or try Time Bandit (a feature of Veggie Toolkit) or Scenalyzer which has a timelapse option.
"Ideally each frame in the final movie would be blended evenly from 256 frames in the original movie."
Ain't gonna happen :-(
When you see professionally done time-lapse clips, it's a film or digital still camera taking one image every x number of seconds, minutes, hours or even days.
You may want to consider doing this (digital still camera) in the future as a still image sequence is very easy to assemble in Vegas.
