I am using Blender for Video Editing for quite some time. Though I always have problem when working with long video when wanting to edit its speed (slow it down or speed it up).
For example currently I want to create a short movie from a long, gopro shot of a skier going down the slope. I want to shorten it by adding some fade-ins and some slow motion. As I am working with video shot with 60 fps I use Speed Effect to get it to normal speed and to add slow motion effects. But it’s very annoying to “cut” this video into parts because Speed Effect only works on a “visible” part (you get very random beginning of the next part when cutting).
Don’t know whether this is a no go, but first idea coming to mind:
How about rendering out the movie as single frames (png,exr,…) with the Speed Effect first. Then reimport and start cutting…
@motimo
Thanks for the reply. Though if I would import speeded up movie there would be no way to slow it down
I gave this problem some thought in the meantime and I think the only way is to first edit it all in “slow motion” and then speed up the parts I want. Not retty, nor intuitive but I’m afraid that’s the best what can be done for now.
To speed ramp a section in the middle of a strip try doing a hard cut Shift-K. This will effectively start the clip a new but from a later frame. If you want to use a 60fps clip in a 24fps or 30fps project then yes you will have to speed up everything other than the slo mo footage. A normal NLE would do this automatically just like the VSE resizes your footage to fit the dimensions.
@3pointEdit
Thank you for your interest in my question. As Hard Cuts are the way to go when slowing down a part of a movie clip, they are not very flexible when cutting and joining unccontinuous parts. Another downside of Hard Cuts is that you can’t use “hard cutted” part with Cross Effect (without cutting it further). On the other hand you can’t use Cross Effect on movie with Speed Effect so it probably doesn’t matter…
Um… why would you a/ need to to cross dissolve to a speed effect from a normal speed effect? I usually just cut to it.
And b/ why couldn’t you perform a cross effect?
Remember that everything (almost) is animatable in Blender, this includes speed ramping of a strip. Keyframe the speed factor in the strip properties, then change the fcurve.
@3pointEdit
Ha! Did not know You can Cross Movie Clips this way. I always did it this way (or by using alpha value is some cases):
Thanks! This changes things
I actually want to cross dissolve to “later” part of the movie clip (with the same, original speed).
Anyway as I think I figured out the best workflow for now and learned a few “tricks” how to deal with movie clips I am taking it and marking this thread as solved.
