How can I change the V4L2 video streming resolution for Visionworks?

Robotics & Edge Computing Jetson & Embedded Systems Jetson TK1
1

In Visionworks samples and demos, I’ve seen that I can add the option

--source="device:///v4l2?index=0"

to get the first V4L2 camera input.

Then what should I type in or modify to change the streaming resolution?

Thank you :D

2

Hi,

You can use the setConfiguration() function in nvxio::FrameSource.

For example,
Modify file demos/feature_tracker/main_feature_tracker.cpp

//
// Create a NVXIO-based frame source
//

std::unique_ptr<nvxio::FrameSource> source(
    nvxio::createDefaultFrameSource(context, sourceUri));

+++ nvxio::FrameSource::Parameters config;
+++ config.frameWidth = 1920;
+++ config.frameHeight = 720;
+++ config.fps = 30;
+++ source->setConfiguration(config);

if (!source || !source->open())
{
    std::cerr << "Error: Can't open source URI " << sourceUri << std::endl;
    return nvxio::Application::APP_EXIT_CODE_NO_RESOURCE;
}

More detail, please refer to the FrameSource.hpp, which located at ‘/usr/include/NVXIO’

3

Thank you AastaLLL :)

That works for almost all camera devices except the magewell PCIe HDMI capture card.

Guess now I should work on the capture card not the Visionworks.