Video Capture Device Viewer -

Minimal V4L2 capture loop (Linux):

Abstract —This paper presents the architecture, design, and implementation of a Video Capture Device Viewer (VCDV), a software application enabling real-time visualization and control of USB video capture devices (e.g., HDMI-to-USB converters, analog capture cards). Unlike generic webcam viewers, the VCDV provides low-level device controls, format negotiation, and performance monitoring. We discuss system requirements, driver abstraction using Video4Linux2 (V4L2) and DirectShow, buffer management, and rendering pipelines. Experimental results show sub-100ms latency at 1080p30 across multiple operating systems. video capture device viewer

This paper is formatted for IEEE conferences but can be adapted to ACM or Springer templates. Minimal V4L2 capture loop (Linux): Abstract —This paper

Latency measured via stopwatch method: camera display on a monitor, VCDV window next to it, high-speed phone camera. struct v4l2_buffer buf

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);