Want to add chapters to video (mkv, x265) files. Need chapters to precisely line up with keyframes to achieve smooth and instantaneous playback transition when skipping from chapter to chapter. Have been using mkvToolnix for this by alternating back and forth between the [Chapter Editor / Info Tool] tabs to manually determine keyframe timestamp closest to desired chapter start time.
As an example: say I want a chapter mark at 00:01:00. I check Info tool tab and scroll until I find nearest keyframe, which may be 00:01:04.271. Manually set that time as the chapter start point, then repeat the process for every chapter. This is a dreadfully slow and tedious process.
Is there any (freeware?) software that can either:
Automatically detect the nearest keyframe based on an approximate timestamp entry, and use that keyframe timestamp as the chapter start point
Create a new keyframe at a point in the file based on a desired chapter start time
...or any other suggestions if you get what I'm trying to do and can think of a better way of doing it.
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Choose them at scene changes
VirtualDub2 can also find all the keyframes, at scene changes or otherwise.
Last edited by manono; 13th Jun 2020 at 14:58.