watch_later: store movie title as a reminder

[bugmen0t]

Over time while using --save-position-on-quit the user may forget which movies/series she dropped at some point. At that point it may be desired to clean up orphaned state files or look up which files they're for in order to resume.

The following can help such a user:

• store filename as a commented out string
• write a special playlist with md5->path mapping

--- mpvcore/player/configfiles.c~
+++ mpvcore/player/configfiles.c
@@ -298,6 +298,7 @@ void mp_write_watch_later_conf(struct MP
     FILE *file = fopen(conffile, "wb");
     if (!file)
         goto exit;
+    fprintf(file, "# %s\n", mpctx->filename);
     fprintf(file, "start=%f\n", pos);
     for (int i = 0; backup_properties[i]; i++) {
         const char *pname = backup_properties[i];

[ghost]

It's intentionally not done for privacy reasons.

[bugmen0t]

Lightweight saving state (as mpv does) isn't much different from history, e.g. ~/.bash_history. Can't you just call umask() before writing to the file or even before creating watch_later/ directory?

[ghost]

Rejected.