Chunks and speed ramps

A chunk is a range of scene frames with its own speed. Everything outside your chunks renders at normal speed, one output frame per scene frame.

Field	What it does	Default
Enabled (checkbox)	Includes the chunk in the render	On
Start / End	First and last scene frame of the chunk	1 / 10
Speed	0.5 = half speed (2x the frames), 0.1 = 10x slow motion, 2.0 = 2x fast forward. Allowed range 0.001 to 10.	0.5
Ease In	Scene frames spent ramping from normal speed into the chunk’s speed; 0 = hard cut	5
Ease Out	Scene frames spent ramping back to normal speed; 0 = hard cut	5

Ramps follow a smooth S-curve, and where the two ramps overlap, the one closer to normal speed wins. A chunk shorter than Ease In plus Ease Out therefore never reaches its full speed, and TimeShift warns you.

• Adding: + creates a chunk right after the last one (the first chunk starts at the current frame). It runs 10 frames and copies the last chunk’s speed and eases.
• Reading the list: each row shows the range, the speed and how many seconds of output it makes. Under the active chunk, a line spells it out: N scene frames → M output frames = S s at F fps.
• Length: inside a chunk, output frames are roughly scene frames divided by speed, so 20 frames at 0.1 make about 200. The footer shows the total for the whole range; a render is capped at 500,000 output frames.
• Overlaps: when two chunks overlap, the one that starts earlier wins, and TimeShift warns. A chunk outside the render range has no effect.