save position is common for all file

[Geobert]

With "save to position" enable (build 231), when using a external explorer, opening a video file, quitting (using back) and opening a new video, this new video start at the position saved for the other video

[sfan5]

This is due to content:// URIs being resolved into just a file description from the view of libmpv.
An easy possible fix would be to override the path mpv hashes for saving positions, if that's possible.

[wnoun]

We can hook on_load, then pass content URIs to mpv and set stream-open-filename in hook with the file descriptor. Also I think the stream_cb API is a right solution.

[sfan5]

We used to have a stream_cb based solution, but this was dropped in favor of resolving the fd in the Java part. Maybe it's time to reintroduce that.

[sfan5]

This is mostly fixed by 65478aa, though the bug will still happen with some apps (e.g. Google Drive).
The bug will be fully fixed when the stream_cb solution is added again (probably soon).