Slow motion playback

blk_diesel wrote on 8/8/2015, 9:42 PM

I want to mount a camera on my PCP air rifle and record video shots at 240 FPS and play them back at 30 FPS in order to see the pellets flight. What would be the best way to do this in Vegas? I have Vegas 11.

Comments

Chienworks wrote on 8/8/2015, 9:55 PM

Some slow motion cameras have the option to set the file to 30fps (or more likely 29.97) regardless of the speed used to record, so if your camera can do this then you don't have to do anything at all.

If not, calculate the speed difference. Assuming your camera records at exactly 240fps and you want to play it back at 29.97, that's 0.124875x. Load the clip on the timeline, right-mouse-button click on it and choose Properties. Set the playback rate. Unfortunately you only get 3 decimal places, so 0.125 would play at 30fps. If you disable resample Vegas will simply drop a very occasional frame here or there to make it fit 29.97, or you could Ctrl-stretch the end of the clip out a tiny bit more to make it match exactly. You'd want to stretch the length one frame longer for every 999 frames.

If you want true 30fps then set the playback rate to 0.125, or if you want 24 set it to 0.10.

blk_diesel wrote on 8/8/2015, 10:02 PM

Thanks. I'm not dead set on the exact frames rate, just slow enough to see the flight of the pellets as clear as possible.

Former user wrote on 8/8/2015, 10:13 PM

You can also export an image sequence at 240fps and then create a new project at 30fps and import the image sequence.