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2 votes
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68 views

This is the v4l2 documentation for 10 bit sensor: https://www.kernel.org/doc/html/v4.9/media/uapi/v4l/pixfmt-srggb10.html According to this documentation I belive my 1 10 bit pixel should be stored ...
1 vote
0 answers
42 views

I'm trying to capture a USB camera video as a series of MJPEG images. I'm using this official example as a base. Please refer to it, since it's quite long to paste it here. The only thing I changed is ...
1 vote
1 answer
182 views

My goal is to capture video using V4L2, and testing it with a virtual video device created by v4l2loopback. I'm feeding a dummy .mp4 to this virt vid device with ffmpeg which is located at /dev/video7....
2 votes
0 answers
64 views

I'm currently writing a C++ Qt App that takes a webcam feed and applies some processing to each frame before rending the processed frame to the app. The problem I'm getting is that when I start my Qt ...
0 votes
0 answers
68 views

I'm facing the issue while testing hw accelirated decoding in Chromium. After some investigation I found out that at the start of decoding Chromuim calls VIDIOC_STREAMON ioctl first and the starts to ...
1 vote
1 answer
159 views

I have 8 cameras (UVC) connected to a USB 2.0 hub, and this hub is directly connected to a USB port. I want to capture a single image from a camera with a resolution of ×ばつ3490 in less than 2 ...
1 vote
0 answers
247 views

I have a problem with decoding h.264 file. The Gstreamer pipeline fails with the following message: ................... 0:00:01.968415100 2374 0x3fa0000b70 DEBUG v4l2videodec ...
1 vote
0 answers
782 views

I'm trying to record a video from a USB device with v4l2 framework and save it in MP4 format using FFmpeg. My sample code successfully captures and saves the video, but I'm running into some issues: ...
Reena's user avatar
  • 11
0 votes
0 answers
252 views

I have Orange Pi5 and ov13855 mipi camera module. Ubuntu 22.04, OpenCV 4.5.4, Gstreamer 1.20.3 I can capture video from /dev/video11 device via gstreamer: gst-launch-1.0 v4l2src device=/dev/video11 ! ...
0 votes
2 answers
382 views

I have bought a stereo camera with global shutter and a frame rate of at most 120 fps. https://www.amazon.com/dp/B0D8T3ZSL4?ref_=pe_386300_442618370_TE_sc_as_ri_0# My next step is to write a program ...
El_Loco's user avatar
  • 1,916
0 votes
0 answers
60 views

I am learning to understand the how v4l2_based drivers work, and subsequently system calls as well. As a part of that working on decoder driver. So I need to take the buffer data out after the qbuf ...
human's user avatar
  • 1
0 votes
0 answers
90 views

I am trying to convert a ros2 topic which named "/serit" to a v4l2 virtual camera which named "/dev/video4" i have writen this code #include <opencv2/opencv.hpp> #include <...
2 votes
0 answers
144 views

With a Teledyne FLIR Hadron 640R thermal and RGB camera and an NVIDIA Jetson Nano Developer Kit - B01 I'm trying to extract metadata from thermal frames using GStreamer in Python3. The RGB attempts to ...
1 vote
0 answers
382 views

(On Raspberry Pi 5) I am using a python script (control.py) to start another python script (main.py) in a separate thread. main.py uses cv2 to get frames from a webcam attached to my Raspberry Pi. ...
1 vote
0 answers
398 views

I want to do live object detection with Raspberry pi 4B 8GB and Pi Camera v3 without using USB Accelerator. I want to do it with "Custom model" but first of all I wanted to test the example from ...

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