What is used to number and identify each frame within the camera roll or editing timeline?

Timecode is a system that provides a unique address to each individual frame within video footage, allowing for precise location tracking within a camera roll or editing timeline. This is crucial in post-production where editors need to sync audio, video, and effects accurately. Timecode is typically presented in hours, minutes, seconds, and frames (e.g., 01:23:45:12), enabling seamless navigation through the footage.

The frame rate relates to how many frames are displayed per second, which affects the smoothness of motion in video but does not identify individual frames specifically. A timestamp records when a video was captured, useful for sorting clips chronologically but lacking the frame-specific context. The scene index is typically a list of different scenes in a project for organizational purposes but does not provide the same level of granularity as timecode for each frame. Hence, timecode is the correct answer as it directly relates to numbering and identifying each frame.