Channel: Taran Van Hemert

Category: Film & Animation

Tags: scalingbilinearstudio swinggradientsh.264gradientvideo editingliterally just an hour of me talking about gradientsposterization artifactsvideoeditingnrandmp4more gradientsnearest neighbornoisebicubicditheringrgb ditheringposterizationtutorialcompressionfull swingpartial

Description: ▼▼ EXPAND FOR NAVIGATION ▼▼ 00:00 Explaining the problem - "partial" video causes doubled and skipped values. 14:48 Trying to use digital noise to reduce banding (bleh) 19:08 Experimenting with other textures 23:34 Interlude: Nearest neighbor scaling: It's important, and Premiere doesn't have it. 19:08 Experimenting with other textures (continued) 28:47 Key insight: Order of operations matters! 30:44 Fixing banding in a video that was already rendered 32:39 Interlude: bicubic scaling vs. nearest neighbor 35:46 Fixing banding in a video that was already rendered (continued) Also, how to key a gradient and other complicated stuff If you want to try this yourself: Here is the source footage that I will be fixing: youtu.be/O6-PZT4jeJk Here is my pixel overlay: dropbox.com/s/8t1oxu7kh0nffh0/pixel%20overlay.jpg?dl=0 dropbox.com/s/0j2s1ottsyikzbk/pixel-replicate-7.png?dl=0 Here is a nearly perfect Bionic Beaver background dropbox.com/s/6r21fof958bmio8/DITHERED_beaver.png?dl=0 52:18 - Photoshop's fancy RGB dithering 1:06:13 - Discovering that YouTube uses different bitrates in the same resolution (FYI, banding can also be called "posterization.") Potentially interesting/useful links: nomorebanding.com/cache graphicdesign.stackexchange.com/questions/8108/is-it-really-impossible-to-have-gradient-without-banding medium.com/@stefanhrlemann/how-to-create-noisy-risograph-style-gradients-and-textures-in-photoshop-in-3-ways-394d6012a93a shunotes.blogspot.com/2015/12/banding-gradient-and-ramp.html loopit.dk/banding_in_games.pdf forums.adobe.com/message/10902765#10902765 Playlist of all Taran's tests: (won't be very useful to anyone else, since you don't know the ingredients) youtube.com/playlist?list=PLH1gH0v9E3rtQ7HbGseUiM56UDNx6n6jA In particular, this video was very useful for me to figure out how different sizes of the faux-pixels are affected by different resolutions in YouTube: youtube.com/watch?v=fLet97r56tE (I'd watch the whole thing with a different resolution each time) Testing lots of different kinds of overlays: youtube.com/watch?v=WF_VvrTTNJQ&t=173s Me and the captain arguing about "partial" video: twitter.com/TaranVH/status/1080232381296963584 Continued: twitter.com/TaranVH/status/1092850961909932032 Later, he admitted he was wrong, HAHAHAHA