Sequence Playlist

The sequential playlist is the simplest form of playlists in SMIL.

In a sequential playlist, media objects are played in the order they are listed in the SMIL playlist. One media object starts playing after the preceding one ends. Use the repeatCount attribute to loop a <seq> — indefinite repeats it forever, as in the examples below.

Simple loop

<seq repeatCount="indefinite">

    <video src="ad1.mpg" region="main"/>
    <video src="ad2.mpg" region="main"/>
    <img src="ad3.png" dur="5s" region="main"/>

</seq>

Loop 2 videos and 1 JPEG indefinitely.

Nested loop

<seq repeatCount="indefinite">

    <video src="ad1.mpg" region="main"/>

    <seq repeatCount="2">
        <video src="ad2.mpg" region="main"/>
        <img src="ad3.png" dur="5s" region="main"/>
    </seq>

</seq>

Plays the sequence: ad1, ad2, ad3, ad2, ad3 and repeats the entire sequence endlessly.

Keep nested <seq>/<par> groups contiguous (next to each other) when mixing them with plain media inside one <seq> — see repeatCount for the parser behavior behind this rule.

Default repeat count

A <seq>/<par> without its own repeatCount plays once by default. Set defaultRepeatCount in the SMIL <head> to change that default for the whole playlist.

Source: a-smil.org