Which fps to set: TikTok 23-60, YouTube list, Sume's 24/25/30/60

All four values Sume can set (24, 25, 30 and 60) fit both vendor rules: TikTok's media transfer guide gives 23 to 60 FPS, and YouTube's encoding page lists 24, 25, 30, 48, 50 and 60. In Timeline 1.0, output.fps is 24, 25, 30 or 60; if you omit it, the render uses the rate of the sources, and 30 applies only when no source has a rate.

Setting versus omitting

Forcing a rate that differs from the source makes the job repeat or drop a frame every few frames, which shows up as judder on motion. Sume reports this as output_fps_resamples_sources and names the rate the sources wanted. That warning is the reason to leave fps unset when all your clips share a rate.

YouTube's page says the frame rate should match the original recording. Sume cannot output 48 or 50, so a 48 or 50 fps source forced into 60 or 24 is resampled. Omitting output.fps keeps the source rate instead.

A rate picker

The snippet returns the Sume values that pass both vendor rules, which is a quick way to prove the overlap to yourself.

sume = {24, 25, 30, 60}
tiktok = set(range(23, 61))
youtube = {24, 25, 30, 48, 50, 60}

print(sorted(sume & tiktok & youtube))