Using Modify-Interpret Footage to help with frame rate judder, but preserve in / out points?

[seanvee]

Hello all-

I'm currently working on a project with pretty much every frame rate that exists chucked in it - I've got VHS, iPhone, old digi cam, mini DV - all with their own frame rates obviously. My project is set for 23.976 as the majority of stuff was shot quite recently at 24P, however - I'm trying to reduce judder on this older stuff since it looks quite odd when I just leave lets say - the 29.97 stuff as is.

The best way to deal with this judder has been to "modfiy - interpret footage" these clips. However, I'm noticing that when I make the interpret footage change - that the clip duration changes (obviously!) - essentially messing up my in / out points for every clip in use in the timeline from a particular file that I apply the interpret footage change to. Does anyone know a way to preserve my in and out points for each clip? - I'm using multiple mini clips from a single video file, and the in and out points of each clip aren't preserved as a result. As of right now I've gotta re-mark the points manually and it's a bit painstaking and inaccurate from my original edit.

I wish I had known about the interpret footage option before doing any actual editing, oh well!

[seanvee]

Bump?

[jasontcox]

Some might argue with me on this point, but here’s my advice - skip the Interpret Footage box entirely. Just drop all your footage into a sequence that has the frame rate settings you want and (at first) dont worry about the frame rate differences. THEN, when it comes time to export, go to your Export Settings window, choose the Format settings you want, but before you hit the export button at the bottom, look for the drop down near the bottom called Time Interpolation and choose Frame Blending. This will apply a frame blend to clips with differing frame rates at the export stage. Technically Optical Flow is higher quality than Frame Blending, but it greatly increases your export time and in the case of frame rate conversions, it’s hard to tell the difference between the two.

Let me know if that helps!

[seanvee]

Wow... thanks so much Jason!

May I ask why people would argue with you?

The interpret footage thing is problematic anyhow since it creates weird slowmo / audio issues... so I'm happy to hear about this.

I've got a beast of a hackintosh, so I'll try the optical flow!

I'll report back early next week when I do my next export, just finishing the edit now.

[jasontcox]

Ha, there are just some old school editors who still use the Interpret Footage window when it’s not as necessary as it used to be. But what I detailed SHOULD work fine for ya. Before you go and try Optical Flow and spend a lot of time on it, remember it’s easy to do a test. Set an in and out point in your timeline around like 20-30 seconds of your footage and export once with Frame Blending and once with Optical Flow. See if you can tell a difference! That way you dont have to export a potentially long program only to Find out you should’ve used the other option!

[Roei Tzoref]

you also don't have to export in order to test it, simply changing the time interpolation of the clip to optical flow and render in to out at a time span of your choosing right in the timeline will let you know it the nasty artifacts of optical flow are there or not.

I would use optical flow on export when my sequence frame rate differs from my output frame rate. when I need selective frame blending, I would use selective optical flow in the timeline, test it in the timeline, and export as normal.

my experience with optical flow has taught me to only use it very carefully and on a small part of a shot. I prefer to skip/duplicate a frame than a nasty artifact.

resources:

Optical Flow Time Remapping – Tips & Tricks for Best Results | Creative Cloud blog by Adobe

[seanvee]

Wow! Thank you both. I'll report back on a small export then, DOH!