Questions tagged [uvc]
UVC is a short for USB Video device Class (also USB video class) and it is a USB device class that describes devices capable of streaming video like webcams, digital camcorders, transcoders, analog video converters and still-image cameras.
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AndroidUsbCamera_not_working
Is there any official Android library to access an external USB camera?
I have gone through all the Android camera samples, but I couldn't get my external USB camera to be detected or listed with the ...
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Is it possible to play RAW video encapsulated in YUYV 4:2:2 format using gstreamer?
I have custom USB UVC camera based on Infineon CX3 controller.
I send RAW10 (1 pixel in two bytes, LSB first, RGGB Bayer pattern) data frames incapsulated in YUYV 4:2:2 format.
Is it possible to play ...
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Can uvc-gadget can go up to 4K on a Rasperry Pi 4B?
I want to know why this tutorial for the raspberry pi cameras can't go up to more than 1920 x 1080p ? The camera module 3 can do 4K, as well as the HQ camera that works with this tutorial.
What has to ...
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how to read the second stream at UVC?
the UVC camera have 4 nodes
cam (usb-fd800000.usb-1.1):
/dev/video9
/dev/video10
/dev/video15
/dev/video16
the cam have two video streams, want to preview the two video at the same time .
using UVC ,...
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question about Maximum Bandwidth on Windows 11 or Ubuntu host for USB UVC Isochronous transfers
I have two embedded linux devices which create 5 UVC camera devices in total, 3 UVC devices from one SOC and 2 UVC devices from second SOC. These two Linux SOC boards are connected to a host (Windows ...
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How do I read an 85 FPS webcam on windows without incurring multiple frames of latency?
I am having trouble reading an ~85 FPS USB webcam Windows, on average I am measuring 85 Hz but its being read in bursts.
I have a python script like below to capture images
import cv2 as cv
import sys
...
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How to set exposure for Still Image capture when using DirectShow API on Windows?
I am trying to use the Windows Directshow API to capture still images using a UVC camera. I am using this article from Microsof(https://learn.microsoft.com/en-us/windows/win32/directshow/capturing-an-...
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With iPadOS 17, can you lock the focus on an external USB camera?
As of iPadOS 17, Apple's platform now allows us to make use of external USB video inputs by supporting the USB Video Device Class (UVC). This is great, but...
Does anyone know how to specify "...
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Change Audio Source for Speech Recognition - Android
The problem is that we are using an HDMI capture device to renderer frame and audio.
The device uses UAC protocol which is registered as an input audio device and selected as the default source of ...
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ROS libuvc_camera package on Rasp Pi - No such devices
I recently tried to run noetic libuvc_camera package on a raspberry pi 3B+ hardware. The camera is tested okay with app like cheese and it is therefore listed as /dev/video0.
Based the wiki page, I ...
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v4l2-ctl won't respond if device disconnect
I can capture video
v4l2-ctl -d 0 --set-fmt-video=width=1280,height=720,pixelformat=MJPG --stream-mmap --set-parm 25 --stream-to=video.yuvj422p --stream-count=1000
While capturing I disconnect camera ...
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v4l2-ctl - set video length in seconds
How I can set video length?
In my example
v4l2-ctl --verbose -d 0 --set-fmt-video=width=1280,height=720,pixelformat=MJPG --stream-mmap --set-parm 25 --stream-to=video.yuvj422p --stream-count=100
I ...
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Issues with v4l buffer cleaning
I've been trying to write a c program to capture photos from a uvc camera using v4l. I've managed to gt it to work for the most part but every second time i run the program i get a zero-filled yuv ...
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What is USB iSereial param
I read topic about iSerial
I test my devices to get iSerial for my case.
For my JML camera I can get
$ lsusb -d 0bda:0567 -v | grep -i serial
Couldn't open device, some information will be missing
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How to properly configure UAC in ARM Linux systems？
The linux kernel version 4.9.37 adds the necessary UVC and UAC components, as well as the USB sound card component. A shell script was executed to configure the device information, and then the ko ...
