Documentation of getCUDAStream()

Humbly9123 · May 11, 2023, 1:09pm

I am trying to replicate the “depth sensing” example with STREAM as INPUT_TYPE. It seems that getCUDAStream() results into a segmentation fault while doing this. How do I get CUDA stream with STREAM input type? Or what is the correct way to run the depth sensing example with STREAM input?

SL-PY · May 11, 2023, 3:19pm

Hi,
It looks like you are confusing CUDA stream, that allow efficiant GPU processing and our streaming API that allows you to stream the camera data.
It looks like you want to use the streaming as input so take a look at this sample:

You will understand how to stream the Camera data (Sender) to another platerform (Receiver):
To connect the mentionned sample, add this line:

github.com

stereolabs/zed-sdk/blob/master/camera streaming/receiver/cpp/src/main.cpp#L111


      
              }
          
          
    output.push_back(s.substr(prev_pos, pos - prev_pos));
              return output;
          }
          
          
void setStreamParameter(InitParameters& init_p, string& argument) {
              vector< string> configStream = split(argument, ':');
              String ip(configStream.at(0).c_str());
              if (configStream.size() == 2) {
                  init_p.input.setFromStream(ip, atoi(configStream.at(1).c_str()));
              } else init_p.input.setFromStream(ip);
          }
          
          
int main(int argc, char **argv) {
          
          
#if 0
              auto streaming_devices = Camera::getStreamingDeviceList();
              int nb_streaming_zed = streaming_devices.size();
          
          
    print("Detect: " + to_string(nb_streaming_zed) + " ZED in streaming");

around here:

github.com

stereolabs/zed-sdk/blob/master/depth sensing/depth sensing/cpp/src/main.cpp#L46


      
          void parseArgs(int argc, char **argv, sl::InitParameters& param);
          
          
int main(int argc, char **argv) {
              Camera zed;
              // Set configuration parameters for the ZED
              InitParameters init_parameters;
              init_parameters.depth_mode = DEPTH_MODE::ULTRA;
              init_parameters.coordinate_system = COORDINATE_SYSTEM::RIGHT_HANDED_Y_UP; // OpenGL's coordinate system is right_handed
              init_parameters.sdk_verbose = 1;
              parseArgs(argc, argv, init_parameters);
          
          
    // Open the camera
              auto returned_state = zed.open(init_parameters);
              if (returned_state != ERROR_CODE::SUCCESS) {
                  print("Camera Open", returned_state, "Exit program.");
                  return EXIT_FAILURE;
              }
          
          
    auto camera_config = zed.getCameraInformation().camera_configuration;
              float image_aspect_ratio = camera_config.resolution.width / (1.f * camera_config.resolution.height);
              int requested_low_res_w = min(720, (int)camera_config.resolution.width);

Humbly9123 · May 16, 2023, 11:49am

Thank you @SL-PY. The webinar document helped to understand what I was trying to do.