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World's Greatest Guide to Fixing Mismatched Video Framerates

▼▼▼EXPAND FOR CHAPTER NAVIGATION▼▼▼ (1 UPDATE AT BOTTOM) Play World of Tanks here: https://tanks.ly/3UaCj8E Thank you World of Tanks for sponsoring this video. During registration use the code TANKMANIA to get for free 7 Days Premium Account, 250k credits, the Premium Tank Excelsior (Tier 5), and 3 rental tanks for 10 battles each: Tiger 131 (Tier 6), Cromwell B (Tier 6), and T34-85M (Tier 6). The promo code is only for new players during registration. Check out the WoT merch on Amazon: https://amzn.to/3HhfIkG 0:00:00 WHEN MIXED FRAMERATES GO WRONG! 0:00:51 Fundamental Principles for Frame Sampling 0:01:31 World of Tanks!? 0:02:46 What causes stuttering 0:06:45 Editing example - when to allow stuttering and when to not 0:12:40 Removing repeated frames in a rendered video 0:14:03 Skipped frames in a rendered video (can't be fixed) 0:15:19 How ALL framerates will fit into all other framerates 0:18:43 stuff is always trying to use as many frames as possible, basically. 0:19:56 Nesting. 0:20:59 Always film at the most appropriate framerate 0:22:51 Shenanigans with 60 FPS 0:25:10 Filming B-roll at 60FPS, then playing it at 30 0:26:02 Changing the VISIBLE framerate 0:29:14 Frame Blending! How it works! 0:32:53 NEVER use frame blending to convert 24 to 30, or 30 to 24. (Or 25.) 0:35:16 So, when is it actually appropriate to use Frame Blending? 0:40:24 Deliberately reducing the framerate with "Posterize Time" 0:42:59 Optical Flow! How it works! How it goes wrong! 0:48:12 Do not use Optical Flow across cuts! (And how to fix it) 0:53:25 A.I. Interpolation!? 0:55:04 Interpolated frames do not look as good as the original frames they are based on. 0:55:51 24 into 30 with no stutter?? 0:57:09 Just how fast and slow should we go? 1:00:33 JUDDER! (It's different from stutter!) 1:03:50 Stutter AND Judder at the same time?! (Light bulbs image) 1:04:55 Let's talk about SPEED RAMPING! 1:06:26 Vector-based interpolation?! 1:08:30 "My Clip Speed Changed From What I Told It?!?" 1:08:48 Variable Framerate Clips and How To Re-Sync Them 1:10:05 The Rate Stretch Tool! It's GrrrrRATE! 1:10:40 The Frame Hold and all the ways it can go wrong 1:11:56 Pulse Width Modulated Lighting 1:12:25 TV motion interpolation - TURN IT OFF FOREVER 1:14:44 Variable refresh rate on your TV/monitor! 1:16:26 Fractional Framerates and Why I Hate Them FREE LINK! https://github.com/TaranVH/29.97.AEP 1:24:41 Screen capture footage: 30.00 or 29.97? 1:26:01 THE END! UPDATE: I forgot to explicitly mention an important workflow detail: Basically, WHEN YOU GET PRETTY MUCH ANY FOOTAGE, after you import it into Premiere (or whatever NLE you use), before you put it onto the timeline, YOU SHOULD CHECK THE FRAMERATE. Do not assume that it will match your timebase. It's always possible that the camera operator made a mistake! (The framerate can be checked easily and quickly for lots of footage at once, using the List View in the bin (the bin is also known as the project panel.)) If any of that footage has a framerate that is different from your timebase, then you can use the techniques I've described here to try to alleviate that. However, keep in mind that sometimes, the listed framerate isn't correct, (visibly) because the clip was ruined by another editor, as described at 14:04. As your editing skills improve, you'll be able to spot a framerate mismatch like this while playing the video at 100% speed. (You will never notice a framerate mismatch at 200% or 300% speed.) However, the best test for this is ALWAYS to just watch the footage frame by frame. While paused, just slowly hit the right arrow key, (to advance by just 1 frame) over and over, and carefully watch the monitor. Repeated frames will immediately become obvious. This will usually show up as one repeated frame per 5 frames, which is what I meant when I say "according to the appropriate spacing" at 13:05. But this absolutely can sometimes be at an interval other than once every 5 frames! The frame-by-frame test will always show you where those repeated frames are! When you spot one, keep going frame-by-frame. Don't always assume that the interval is constant, like I did with that footage from Apple! (Which I then notice and fix at 13:24.) As mentioned, skipped frames are harder to spot, but can most easily be seen during panning moves. NOTE that the results of this test may be different depending on if you are using the Program monitor or the Source monitor! The Program monitor is using your Timebase, while the Source monitor is not. The Source monitor always shows your video clips exactly as they are, before they are altered in any way by the Sequence you place them into. Watch my 4 hour editing tutorial of a Linus Tech Tips video:    • World's Most Advanced Video Editing T...