Seek to a frame number

[tobiasBora]

I would like to be able to decode (using webcodecs) all frames between two fixed position (say 100-th frame to 200-th frame). I saw that mp4box provides a seek function, but it accepts time instead of frame number. Is there another way to seek a specific frame? I’m thinking to save all elements given to onSamples and loop over this list to find the data of a specific frame (starting earlier to find a RAP), but I don't know how memory efficient this is since I need to load in memory the whole video file, and I don't know if it is the recommended approach.

[hughfenghen]

You can refer to this DEMO： https://hughfenghen.github.io/WebAV/demo/1_4-mp4-previewer

but I don't know how memory efficient this is since I need to load in memory the whole video file

Saving the video to OPFS（Origin private file system） should be fine.