Speed Ramping questions

Hi there, I've got a couple of Canon DSLRs and a couple of action cams, I'm heading to Samoa in a few days and I'll be taking quite a lot of video of my sightseeing and water fun, just wondering if there is any particular software youd all recommend for throwing together some vids, I specifically want to be able to adjust speeds gradually for effect.

TIA
Jason

I've been hoping someone with specific experience would jump in. Mine is limited.

The Adobe CC versions of Premiere and After Effects include the Optical Flow frame interpolater, it's supposed to be good.
https://blogs.adobe.co​m …-tricks-for-best-results/

Twixtor is an excellent tool for slowmo.

Probably on the road in Samoa shouldn't be the first footage you try to shoot and process...

Of course you'll want to be shooting progressive at the highest frame rate your cam will do.

Cheers, what do you mean by "shooting progressive"
My action cam will do 720 @ 120 fps or 1080 @ 60 fps

I have figured out how to get the speed ramping working on PP 5.5 so I'll roll with that for a while, I wish the go pro software had this function because it's so simple to use

Milutiche wrote in post #18158050
Cheers, what do you mean by "shooting progressive"
My action cam will do 720 @ 120 fps or 1080 @ 60 fps...

Again, I'm more talk than action in slowmo, but am solid on theory!

Progressive means complete frames, as opposed to Interlaced frames made up of two fields, the older broadcast standard that is available on some cameras. Progressive is the "p" in 720p or 1080p. Better for slowmo.

If you select "interpret footage" (IIRC) in Premiere CS5.5 you can play your 120fps footage at 30fps (25fps in NZ?), thus achieving 1/4x slomo without having to create in-between (tween) frames. Or, your 60fps yielding 1/2x slowmo.

It's in tweening that new frames have to be created - this is where the heavy lifting is performed by specialized software interpolating between two frames you actually shot, generating a new frame or frames based on them.

If you're ramping the speed gradually down, that's more interpolated frames than just playing higher FPS at 30/25fps. If you're wanting to get slower than 1/2x for 1080p60 footage, that's more interpolated frames if you want it smooth.

How smooth is smooth? It can be perfect with well-shot footage and Twixtor. Adobe's Optical Flow may do as well?

How much money and learning is it worth to you to do perfect ramps and interpolated slowmo? Sounds like you want to visit Samoa and have some fun, there's nothing wrong with that!

But, those are some of the challenges of the post workflow to visually perfect slowmo and ramping. Which we're all used to seeing in broadcast sports.

In shooting video, the rule of thumb is a shutter speed that's half the frame rate, which provides a conventional amount of motion blur. For slowmo, a bit more calculation may be needed, but, shooting your 120fps at a 1/250th is a good starting point for 1/4x slow. (60fps at 1/125th for 1/2x slow). Shooting 120fps at a 1/60th shutter speed will result in blurry frames, not suitable for most action slowmo. Some would go to much higher shutter speeds and maybe add some motion blur back in post. If you really follow this, that would mean that for best results all your slow shots would be planned for the intended slowmo rate...

Here's a good looking Twixtor clip with an ideal subject - skater is clean against the sky. You can find lots of bad Twixtor clips on Youtube too.
https://youtu.be/LpvFe​mLiytA

Here's Adobe making Optical Flow look easy. Again, lots of clips of all levels of quality can be found. This one started as Gopro footage.
https://youtu.be/3YE5t​ff8pqg