pub fn lossless_segments(project: &Project) -> Option<Vec<(f64, f64)>>Expand description
If the project is a pure cut of exactly one video source (every clip from the same asset, audio clips
exactly mirroring their linked video clip’s timing on each audio stream (muted tracks may be dropped),
no gaps between clips, no text/image/sequence clips, no effects/retime/pan/fades, volume 1, all clips
enabled, no transitions, no burnt-in subtitles), return the segments as (src_in, duration) in timeline
order. Such a project can be written with -c copy.