fast motion?

neuractr wrote on 2/3/2008, 12:31 PM

Im trying to make an old fashioned slapstick film with fast motion. I try to time stretch the clip but it doesn't seem to work that well.It just makes it a bit jerky and it skips around instead of just being smooth. Is there a way to get sped up motion without that jerkiness?
Also anyway to make just a small section of a clip speed up instead of a whole clip?
thanks

Comments

Chienworks wrote on 2/3/2008, 1:41 PM

Try rendering and see if the resulting file looks smoother. It's quite possible that your computer can't keep up with the processing involved in speeding up the clip in real time so that may be why the preview is jerky.

If you want to speed up just a section, split the beginning and end of that section with the S key. You can then treat that section separately as if it was it's own clip.

neuractr wrote on 2/3/2008, 9:44 PM

thanks so much. Ill try that out. So when i split the part that i want to speed up i assume i have to seprate it from the main clip so i can change the speed or is there a way to change the speed by just highlighting that section?

Chienworks wrote on 2/4/2008, 3:43 AM

Once you've split it, it becomes it's own event separate from the rest already. Ctrl-stretching or Ctrl-squishing it will affect only that event.

neuractr wrote on 2/8/2008, 1:29 PM

Thanks so much. It works with some of my clips and not with others. Going to do some tests before i shoot. Thanks again for the help.

ekez wrote on 2/12/2008, 2:43 AM

Just a beginner here. But I'm a big right click guy for software commands. I've right clicked an event and changes the properties playback rate to .44 instead of 1.00 to slow a segment down. It gives me a better mathematical control of the speed. The sound is also effect.

mickbadal wrote on 2/13/2008, 10:05 AM

"I've right clicked an event and changes the properties playback rate to .44 instead of 1.00 to slow a segment down. It gives me a better mathematical control of the speed."

The big downside with that approach is that it leaves the event duration the same, which means the in and out points for the event change on you. In my experience, users typically want the clip preserved in its context, including its current in and out points, when speeding it up or slowing it down. Ctrl-drag does this, but unfortunately is difficult to control down to an "exact" speed rate. Right click gives you better control over exact speed rate, but changes the in and out points for the clip. Kind of annoying.

For this reason, I found changing speed & reversing video to be one of those features that worked much better in tools like Premiere for example - simply right click the clip, select video > speed, then set a percentage: 200% for double speed, or -200% to reverse the clip and double the speed, etc.

I wish Sony would improve Vegas in the area of this one feature.

ekez wrote on 2/13/2008, 2:27 PM

Thanks Mick
I appreciate the pro's and con's