Alcorn Mcbride Digital Video Machine 4, Руководство пользователя

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38 Playlists
Example Playlists
Single Channel Playlist Example
; ply00405.lst
; Play a simple series of videos – Loop playlist when complete
; Play Video #1 (vid00001.mpg) – 30 seconds long
1PL
; Play Video #2 (vid00002.mpg) – 30 seconds long
2PL
; Loop to beginning of playlist
<
The above example is probably the simplest playlist you could ever write, so lets
go over it in detail to understand how to use it and how it will behave.
To use this playlist, we must first Search and Play it to a specific channel (just as
we would a video). For this example, we will start this playlist on Channel 2
using the following Serial Commands:
4052SE <CR> Search Playlist #405 (ply00405.lst) to Channel #2
2PL <CR> Play Channel #2
Now that the playlist has been started, the first command will be executed.
Scrolling down the playlist, we see that the first command is
1PL . The playlist
engine will automatically insert the channel number that this playlist belongs to
(Channel #2 in this example) changing the command to
1 2 PL. It then passes
this command on to the EXACT same engine that analyzes serial commands (the
Command Engine ). The Command Engine then interprets this command
according to the table in the General Command Summary section and causes
Video #1 to play on Channel #2.
Now that Video #1 is playing, the playlist will not advance to the next command
until that video is done playing. When the video is complete (30 seconds later in
this example), the playlist will advance to the next command (
2PL) and do the
exact same thing (convert to 22PL and send). After the completion of Video #2,
the playlist will encounter the ‘ < ’ operator, causing the playlist to start over at
the beginning.
Since the channel number is automatically inserted, this type of playlist is
interchangeable. This same exact playlist could just as easily be searched to
another channel (like 1,3, or 4) without ANY modification.