Video Capture Device Viewer ✔ [ ESSENTIAL ]

Minimal V4L2 capture loop (Linux):

Latency measured via stopwatch method: camera display on a monitor, VCDV window next to it, high-speed phone camera. video capture device viewer

struct v4l2_buffer buf; fd = open("/dev/video0", O_RDWR); ioctl(fd, VIDIOC_STREAMON, &type); while (running) ioctl(fd, VIDIOC_DQBUF, &buf); process_buffer(buffers[buf.index].start); ioctl(fd, VIDIOC_QBUF, &buf); Minimal V4L2 capture loop (Linux): Latency measured via