Basler Vision Connector Messaging: Starting Image Streaming#

With the Basler Vision Connector you can control the image streaming by starting and stopping the image stream. The control doesn't affect any camera property, including the trigger definitions. If you want to change these camera properties, see the messages described in Setting Camera Quick Parameters.

With the following command you can initiate image streaming for a specific camera. When you activate it, continuous streaming publishes images to the streaming topic. For triggered image acquisition, the Basler Vision Connector sends images based on trigger configurations defined via the camera parameters.

JSON Payload#

Field	Optional	Type	Description
TransactionID	Yes	String	Transaction identification
Action	No	String	Method called. Fixed value: `StartStreaming`
DeviceID	No	String	Device identification
FrameCount	Yes	Integer	Number of frames to be streamed. Values less than `1` are invalid. If no frame count is provided, the camera streams continuously until you stop the streaming.
cstm_FormatConversion	Yes	String	The format into which the images will be converted after reception from the camera. The following options are available: None = The original camera image is forwarded as received from the camera JPEG = The camera images are JPEG compressed and then forwarded If no format conversion is specified, the original camera image is forwarded as received from the camera.

{
    "TransactionID": "12341263412635465",
    "Action": "StartStreaming",
    "DeviceID": "548451887",
    "FrameCount": 100,
    "cstm_FormatConversion": "None"
}

Response Object#

Field	Optional	Type	Description
TransactionID	Yes	String	Transaction identification
ReturnCode	No	Integer (32-bit unsigned)	Message code following Message Codes
Message	No	String	Response message

{
    "TransactionID": "12341263412635465",
    "ReturnCode": 0,
    "Message": "Stream started."
}