Re: Recovering playback state of multiple playlists and over multiple sessions

[Yuchen Pei]

Yoni Rabkin <yoni@rabkins.net> writes:

> Yuchen Pei <hi@ypei.me> writes:
>
> > Hello,
> >
> > I often have several long playlists of spoken words, mostly 
> > conference
> > talks and lectures, and I wonder how I can resume where I left 
> > from
> > last time.  I have them all saved in native playlist files, and 
> > load
> > them manually when I start an emacs session.
> >
> > There are two problems:
> >
> > 1. Say I have two playlists A and B, A is at track 42 at 23:00 
> > and B
> > is at track 73 at 87:32.  I just paused track 42 of A and would 
> > like
> > to resume track 73 of B.  How do I do that?  If I navigate to B 
> > and
> > press RET (emms-playlist-mode-play-smart) or invoke
> > (emms-playlist-mode-play-current-track), track 73 will start 
> > from 
> > the beginning, rather than 87:32.  If I navigate to B and press 
> > P,
> > track 42 of A will resume.  I also tried switching to playlist 
> > B 
> > at the metaplaylist first, but that did not seem to help 
> > either.
> >
> > 2. Say I have one playlist A at track 42 at 23:00.  How do I 
> > save it,
> > close emacs and resume at track 42 at 23:00 next time I open 
> > emacs and
> > load the playlist?  I tried saving the playlist as a native 
> > playlist,
> > but when I load it starts from track 1 again.
>
> `emms-bookmarks' has code to support this, but it isn't 
> extensively
> developed because this is an edge case and doesn't come up very 
> often. I
> have used `emms-bookmarks' in the (far) past and I remember it 
> working
> well enough at the time.

Thanks for the pointer.

As I understand it emms-bookmarks's goal is to restore the 
playback position in a media file, but not to restore to the item 
in a playlist across emacs sessions (my second problem).  I tried 
emms-bookmark-add on an item, switched to another playlist and 
played something there, and came back to the item, and did 
emms-bookmark-next.  It didn't restore the position.  I'll have to 
look more into it.

> One of my uses for Emms is to watch video's stored on my disk, 
> and many
> of them are very long (6 or 4 hour endurance races). In that 
> case I use
> the mpv backend with its save-position-on-quit option, so both 
> saving
> and continuation is handled outside of Emms.

I tried save-position-on-quit - it doesn't seem to work on streams 
over https and ssh, which are the only things I play with emms 
these days...

This also does not address the second problem.  I guess I'll have 
to hack out something myself.

Do you think restoring to an item in a playlist across emacs 
sessions is also an edge case?

--
Best,
Yuchen

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