TIP: When you are in a multiple player, master/slave configuration, you should stop all
slave players before loading new content on the master player if that content has a different frame rate than the
1. Stop all players.
2. Load new content on the master player.
3. Load new content on the slave players.
4. Send the tcreceive and tcplayat commands.
5. Use the tcstart command to begin playback of the new content.
Changing content on the master player without stopping the slave players may result in a flashing or green screen output to the displays until the new content is loaded on the slave players.
Configuring LTC for Synchronized Multi-player Operation
Control Example — Single file using separate control
This example is the simplest type of synchronized show, requiring two players. Each player loads a single clip and plays it through to the end. This is an example of a technique that might be used in a 3D theater.
The following table assumes that you want to play the file <folder>/<name> in channel 1 of two JMP 9600 units, beginning at the
Command to Master Player | Command to Slave Player | Function |
|
|
|
LoadClip 1 <folder>/<name>] | LoadClip 1 <folder>/<name>] | Load a clip (cue it) into channel 1 of both media players . |
|
| For a playlist, use the LoadPlaylist command. |
NOTE: The media players respond to the LoadClip commands with OK] after the file loading process is completed. You may need
to build a delay into the sequence required between the LoadClip and Tcgenerate commands. The actual delay required is dependent on the size of the clip file and must be determined by experimentation, but start with 1 second.
Tcgenerate 00:59:55:00]
TcPlayAt <1> 01:00:00:00]
Tcstart]
Tcreceive]
TcPlayAt <1> 01:00:00:00]
Program the master player as the LTC generator. Program the slave player as the LTC receiver.
Set both media players to begin playing at a specific LTC timestamp.
Set the master player to begin LTC generation.
Both media players begin showing video at the LTC timestamp specified in the Tcplayat command.
NOTE: Adjustments to the Tcplayat timestamp on the slave player can correct for 
encoding errors.
When the media player is set as a timecode master and a clip or playlist is loaded, the player begins to generate LTC as a response to either of two commands:
•Play — This command can be from the front panel Play/Pause (
) button, the Play (
) control on the Player Control HTML page, or the Play MSVPP command.
•TcStart — This command can only be sent via MSVPP (although when you have loaded a playlist with defined timecode parameters and you then click the Play control (
) to start the show, it has the same affect as issuing the TCStart command).
JMP 9600 Media Player • Detailed System Interaction | 88 |
