BLACKMAGIC Pocket Cinema Camera 4K (CINECAMPOCHDMFT4K) - Инструкция по эксплуатации - Страница 144

Device Name

UUID: FFAC0C52-C9FB-41A0-B063-CC76282EB89C
Send a device name to the camera (max. 32 characters).
The camera will display this name in the Bluetooth Setup Menu.

Protocol Version

UUID: 8F1FD018-B508-456F-8F82-3D392BEE2706
Read this value to determine the camera’s supported CCU protocol version.

NOTE 

Encrypted characteristics can only be used once a device has successfully 

bonded or paired with the Blackmagic Camera. Once a connection has been 

established, any attempt to write to an encrypted characteristic will initiate bonding. 

For example, writing a ‘Camera Power On’ (0x01) message to the Camera Status 

characteristic.
Once bonding is initiated, the camera will display a 6-digit pin in the Bluetooth Setup 

Menu. Enter this pin on your device to establish an encrypted connection. The device 

will now be able to read, write and receive notifications from encrypted characteristics.

Blackmagic SDI and Bluetooth Camera Control Protocol

Version 1.5

If you are a software developer you can use the Blackmagic SDI and Bluetooth Camera Control 
Protocol to construct devices that integrate with our products. Here at Blackmagic Design, our 
approach is to open up our protocols and we eagerly look forward to seeing what you come up with!

Overview

This document describes an extensible protocol for sending a unidirectional stream of small control 
messages embedded in the non-active picture region of a digital video stream. The video stream 
containing the protocol stream may be broadcast to a number of devices. Device addressing is used 
to allow the sender to specify which device each message is directed to.

Assumptions

Alignment and padding constraints are explicitly described in the protocol document. Bit fields are 
packed from LSB first. Message groups, individual messages and command headers are defined as, 
and can be assumed to be, 32 bit aligned. 

Blanking Encoding

A message group is encoded into a SMPTE 291M packet with DID/SDID x51/x53 in the active region 
of VANC line 16.

Message Grouping

Up to 32 messages may be concatenated and transmitted in one blanking packet up to a maximum 
of 255 bytes payload. Under most circumstances, this should allow all messages to be sent with a 
maximum of one frame latency.
If the transmitting device queues more bytes of message packets than can be sent in a single frame, 
it should use heuristics to determine which packets to prioritize and send immediately. Lower priority 
messages can be delayed to later frames, or dropped entirely as appropriate.

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Developer Information