FrameGrouping
type FrameGrouping = "keyframe" | "frame";Defined in: relay-sdks/ts/src/frame-writer.ts:9
How a FrameWriter maps frames onto groups. 'keyframe' is the LOC mapping for video: a keyframe FINs the
open group and opens a new one, deltas append to it. 'frame' sends every frame as its own single-object group, the
mapping for audio and any other independently decodable frames.