That is, as such formats allow subclass to extract position from frame, it is possible to extract duration (if not otherwise provided) from (near) last frame, and a seek can fairly accurately target the required position. Fixes #631389.
That is, as such formats allow subclass to extract position from frame, it is possible to extract duration (if not otherwise provided) from (near) last frame, and a seek can fairly accurately target the required position. Fixes #631389.