Extron Electronics MS9500 HD FrEND Plus - Manual (Page 39)

MS9500GL HD FrEND Plus Chapter 4: Linear Timecode (LTC)
Tcstopat hh:mm:ss:ff
Sets the timecode stopat time
Tcstart
Starts the timecode running (assumes the player is in Generate mode).
CONTROL EXAMPLE
This example is the simplest type of synchronized show. Two players, each load a single clip and play it through
to the end. This technique might be used in a 3D theater for example.
The required sequence of events, triggered by show-control is:
•
Cue the players (Playrange command). This command readies the file on each player for playback.
•
Program the Master timecode generator (Tcgenerate)
•
Program the “Slave” as a timecode receiver (Tcreceive)
•
Tell both devices to begin playing at a specific timecode (Tcplayat)
•
Tell the master to begin timecode generation (Tcstart)
The HD Players will begin video playback when the timecode specified in the tcplayat command is reached.
Command sequence to play file 0 on both players at 01:00:00:00, with a 5 second timecode lead in.
NOTE: This example assumes both MS9500GL players are using the same base channel (1 in this case).
The player responds to the Playrange when the file loading process is completed. If the show control system is
not using these responses to control the timing of messages to the MS9500GL, a delay will be required between
the fastseek and tcgenerate commands. The actual delay required is dependent on the file and will need to be
determined empirically.
Device 1 "Master" Device 2 "Slave"
Playrange 1 0 0 Playrange 1 0 0
Tcgenerate 1 00:59:55:00 Tcreceiveloop 1
Tcplayat 1 01:00:00:00 Tcplayat 1 01:00:00:00
Tcstart 1
NOTE: Adjustments to the slave Tcplayat timecode may be necessary to correct for encoding errors.
In the example above the symbol represents an ASCII carriage return, in practice this should be sent as a
byte with the value 0d (hex) or 13 (decimal).
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