autoloop.js

/***********************************************************************
autoloop.js - mpv script which reads and play a custom playlist file in
a loop. Images are displayed for a specified duration and other clips are
played normally.

mpv should be invoked as: `mpv --script=path/to/autoloop.js --idle`

The info file should consist of lines where each line is:
<length> <clip-path>

E.g.
0 path/to/clip.mp4
5 path/to/some/image.jpg
0 /another/clip.mkv

Sets image-display-duration to length and plays the clip. Images would be
affected by the length value while other clips will not.

After the last line was processed, start again with the first line.

Note: For simplicity, there should be no empty lines, exactly one space
      between length and clip-path, and no extra spaces before or after
      (but spaces as part of clip-path are premitted).
***********************************************************************/

var data = mp.utils.read_file("~/autoloop.info");
data = data.split("\r\n").join("\n").split("\n");
var i = 0;

function start_item(length, clip) {
    mp.set_property("image-display-duration", length);
    mp.commandv("loadfile", clip, "replace");
}

function play_next_item() {
    var space = data[i].indexOf(" "),
        length = Number(data[i].substring(0, space)),
        clip = data[i].substring(space + 1);
    print("next_item: '" + length + "', '" + clip + "'");
    start_item(length, clip);
    i = (i + 1) % data.length;
}

mp.register_event("end-file", play_next_item);
play_next_item();