Let's say I have a video on the timeline which is 20 seconds long. I add a velocity envelope of 50%, meaning that it will play at half speed. Meaning that 20 seconds will take 40 seconds to play. HOWEVER, it will really only play the first half, and the 2nd half is gone. This is because the video on the timeline is still only 20 seconds. What I would need to do is stretch the video to 40 seconds. Is there a way to automatically stretch the frame to an EXACT percentage (in this case 200%)?
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Thread: Sony Vegas - Velocity Envelope
This isn't ideal, I still would like a way to TYPE a percentage increase for the stretch, but what it does, is as you stretch, it locks for a second at the appropriate length
And another problem: If you split a video twice (so into 3 parts) and just slow down the middle part and stretch to that point, it does it based on the WHOLE VIDEO not just that 1/3 split
Another way, if you want 50% slow down , you can just right click the clip on the timeline =>properties => video even tab and enter the value in playback rate (e.g. 0.500) for 50%. To extend the clip , the only way I know is to drag the end, there will be a "notch" right where the doubling point is and it will "snap" to it. That notch is where the clip will repeat itself . Maybe others know a different way of extending the clip
Not sure what you're saying about the last point about splitting a clip, are you saying the 1st third and last third are affected by speed changes as well? It seems to work ok here
Vegas only has 2 methods of slo mo (assuming you don't have actual higher fps footage) , and that is to either blend frames or duplicate frames. Neither are ideal. The default behaviour with the clip (smart resample enabled) is to blend frames -> the new frames generated for slo mo are blended and blurry. If you disable resample, they are duplicated instead -> choppy playback. In all cases , having actual footage shot with higher fps is way better.
are there NLE with better slow mo options?
To illustrate the different approaches, I did a mini comparison a while back for another thread, a 4x slow down (so 25% playback rate), in vegas using the 2 methods, in AE's pixel motion, and avisynth's mflowfps. Have a look if you're interested. These are in Xvid, so you can use something like VLC or MPCHC to play them
Say I put a video on the timeline
And split it twice
Now I have 3 parts
Part 1 I leave at regular speed
Part 2 I make it play at 0.5, so twice as slow
Then Part 3 regular speed
I move Part 3 way over to the right temporarily
Then I stretch part 2 so it plays the whole thing, but that snap point has it end at the end of the whole video, not at the end of just that part.. so when part 2 is done, part 3 is repeating part of it
ok I see what you're saying. When I get a chance later I'll play with it and try to figure it out. I tend to do speed ramps in AE with time remapping . It's probably something really simple, hopefully someone else knows
EDIT : Nope, seems to work fine here. I'm creating a subclip , it can go on the same timeline track, or a different one .
So your 1 track is cut with "s" key into 3 pieces , the middle section you can right click, create subclip. Just put that into a new track for now. You can delete the "old" middle section . On the new subclip , Enter the 0.5 playback rate, strech it out to the notch exactly, then realign the last clip and it should play seamlessly .
Maybe you weren't stretching the clip to the notch point? If you go over or under it will cut off or repeat frames
Last edited by poisondeathray; 14th May 2010 at 14:45.