Method

Frame rate match

Subtitle frame rate vs video frame rate

What we measure and how

For frame-based subtitle formats (EBU-STL, TTML with frameRate metadata), the declared frame rate is matched against the video's frame rate. A 25-fps subtitle on a 23.976-fps video will drift.

Provenance

Standards

EBU-STL · TTML 2 frameRate

Method identifier: frame_rate_match