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frame doubling aka frame replication is a cheap way to make a lower frame rate video fit into a higher frame rate format by duplicating nearby frames. unlike frame interpolation or frame morphing it doesn't try do blend nearby frames so its appearance doesn't change at all.
it's the temporal equivalent of nearest-neighbor upscaling.
often, especially cartoon and anime studios, choose to do so far artistic or budget reasons. sometimes the source content is on a medium which only supports a fixed higher frame rate so it had to be frame doubled, other times only versions with replicated frames even exist. however, except for these three previously mentioned excepts, videos and animations should NEVER be uploaded here frame doubled for the same reason that images shouldn't be uploaded upscaled either: it doesn't help but rather hinders compression while also not improving the appearance of the animation.
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Last updated: Sat, Mar 30 '24, 19:36
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