Remember Duration Time settings

[Oggom]

When playing a video mpv will display the current timestamp of the video (hh:mm:ss) on the left side of the progress bar and the time remaining on the right side of the bar. By clicking on the timestamp it will change to also display milliseconds. Clicking on the remaining time will display the total length of the video instead. However, these settings are currently not remembered and will reset to default when the program is closed.

It would be nice if mpv could remember these settings.