Provide an option to quickly seek by a number of frames
|Reported by:||Ridley Combs||Owned by:|
|Blocking:||Reproduced by developer:||no|
|Analyzed by developer:||no|
There are some cases where a user has the start and end frame numbers for their desired transcode, but not the corresponding timestamps. It'd be convenient to have an option analogous to
-ss (as an input option) that skipped to the given frame number.
As most formats don't have frame numbers, this would require the file to be read all the way up to the seek point to count frames, but shouldn't necessitate *decoding* video until the first keyframe before the seek point. This would likely involve reading up to the given frame, then acting as if
-ss was given with that frame's timestamp (i.e. index-seek to nearest keyframe, then insert trim filters).