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Questions tagged [usb-camera]

37 questions
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24 USB cameras attached, but only 18-19 respond

I have a 24 USB camera array attached to a Raspberry Pi 400 using powered hubs, but only 18-19 of them are actually visible to the system when I do an ls /dev/video* or use v4l2-ctl. I've verified all cameras are getting sufficient power. Which 18…
mcgregor94086
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Is it possible to use cv2.Videocapture to access video devices greater than 7 index on Ubuntu 18.04?

Currently trying to simultaneously capturing 10 images with 10 usb cameras connected to a Raspberry Pi 4 (through board USB ports and usb hub) with Ubuntu 18.04 installed. I am using a multithreading approach to create multiple camera objects which…
Asherk03
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manually adjust the exposure on a generic aliexpress camera

i know this is not the place for my question, but if anyone knows the answer it would be awesome! so, i bought this camera very cheap on aliexpress and it even works, but the automatic exposure adjustment is not good, and as i sit in front of a…
Bruno Miguelez
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How to access external camera using camera2 android

I'm trying to access external usb camera in android(java). I was accessed only internal camera's(Front and Rear). I'm not able to understand how to do. MainActivity.java public class MainActivity extends AppCompatActivity { private Button…
Yogesh
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kinect dk camera not showing color image

Situation is very weird, when I got it over a year ago, it was fine. I have updated the sdk, updated the windows 10, updated the firmware, all are latest. behavior in the official "Azure Kinect Viewer" is the following: device shown, opens fine. if…
Tango Developer
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How to create rosbag file using usb camera provide camera images as sensor_msgs/CompressedImage and odometry as nav_msgs/Odometry

Help me to create rosbag file using usb camera which provide camera images as sensor_msgs/CompressedImage and odometry as nav_msgs/Odometry.
Maher Abbas
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qt creator using QMediaRecorder with usb cam in raspberrypi

I am trying to use usb cam with raspberry pi 3 to create a program that stream video from cam and record it. I am using qt creator to do that but there is a problem in QMediaRecorder after I record a video the video is just show one image please can…
mouaiad salaas
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Capturing video with UVC Camera Android

I am using this library files to capture image from my UVC camera: https://github.com/jiangdongguo/AndroidUSBCamera For video recording there is a problem that I can not understand, it saves the video as mp4 but the video looks empty. When I try to…
Burcu TOPÇU
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mobile-ffmpeg capture android usb camera data

I want to record video form android USB camera using mobile-ffmpeg. for recording built-in cameras, "android_camera" input device option can be used. but for recording USB camera,"video4linux2" option should be used. as said in v4.3.2 chanelog,…
Mahdi ZE
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Is it possible to connect mobile with USB camera and Macbook/Windows at a same time to debug the Android Application?

I want to create an Android application where I can process the Images from a USB Camera and run ML detections on them. I have Pixel 2XL, Logitech C920, and Macbook Pro, which I want to connect at the same time, so I can debug the application…
Harshit Saxena
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USB camera doesn't work on my RaspberryPi

The present situation is... my pi is RaspberryPi 3 B+ my usb camera is SPCA 2100 pc camera made by Sunplus IT I want to CROSS_COMPILE RaspberryPi and Qt 5.12.3 so that the camera screen can be shown on RaspberryPi. Now I have succeeded in…
sy.kim
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Verifying that an org.WebRTC VideoFrame or NV21Buffer contain a valid (not corrupted) picture

I call the following method to stream frames from a USB Camera to org.WebRTC's Video Capture Observer. It works fine, except for some corrupted frames (green, or distorted grey frames) that appear every couple of seconds in the remote peer's video…
WM1982
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USB camera live Streaming over RTMP having issue in android

I am using https://github.com/saki4510t/UVCCamera library to preview USB camera to texture view and for streaming, I am using https://github.com/pedroSG94/rtmp-rtsp-stream-client-java library. I have used the RtmpCamera2 class for streaming and…
P. Patel
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Gstreamer can't capture video from USB-Camera

I have a HikVision MV-CA050-20UC USB-Camera(USB 3.0). I want to capture video from it on Nvidia Jetson Nano in Ubuntu by using gstreamer. After installing the drivers, /dev/video0 shows up after connecting the camera (it also vanishes once the…
BarzanHayati
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Select usb camera in cv2 in python

I would like to access my web camera on my python program using cv2 library. I can see and use my camera in any mac program (photobooh, facetime,..) as well as skype,... But if I try to access it in python I can't: cap =…
Marko Zadravec
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