Receive images continuously using ArvStream in software trigger mode

[GJChen919]

Describe the bug Receive images continuously using ArvStream in software trigger mode

To Reproduce I receives images with ArvStream based on the sample code - arvexample.c and I try to change the trigger source - software in the below codes:

arv_device_set_string_feature_value(dev, "AcquisitionMode", "Continuous", nullptr);
arv_device_set_string_feature_value(dev, "TriggerSelector", "AcquisitionStart", nullptr);
arv_device_set_string_feature_value(dev, "TriggerMode", "Off", nullptr);
arv_device_set_string_feature_value(dev, "TriggerSelector", "FrameStart", nullptr);
arv_device_set_string_feature_value(dev, "TriggerSource", "Software", nullptr);
arv_device_set_string_feature_value(dev, "TriggerActivation", "RisingEdge", nullptr);
arv_device_set_string_feature_value(dev, "TriggerMode", "On", nullptr);
std::cout << arv_device_get_string_feature_value(dev, "TriggerSelector", nullptr) << std::endl;
std::cout << arv_device_get_string_feature_value(dev, "TriggerSource", nullptr) << std::endl;
std::cout << arv_device_get_string_feature_value(dev, "TriggerMode", nullptr) << std::endl;
arv_camera_set_frame_rate(camera, 4.0, NULL);

The output of features are fine, but I still receives many images after AcquisitionStart with no other operation.

Expected behavior Unless I call arv_camera_software_trigger or arv_device_execute_command(TriggerSoftware), it shouldn't comes any image generally.

Camera description:

• Cognex, Lucid, Hikvision
• CIC-5000R, TRI245S-M, MV-CH250-21GM-F-NF
• GigE

Platform description:

• Aravis 0.8.20
• OS: Windows 10 64bit
• Hardware Intel I7

Additional context My code is main_isu.zip in the attatched

[EmmanuelP]

Hi,

...
arv_camera_set_frame_rate(camera, 4.0, NULL);

This function actually changes the trigger settings, and makes the camera emit 4 images per second. You should remove this call if you want to trigger the image acquisition using arv_camera_software_trigger().

Cheers.

[GJChen919]

@EmmanuelP Very thanks, it solved.