Questions tagged [webcam]

A webcam is a device that records video and then uploads that video to a computer.

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1answer
50 views

Raspberry Pi4 error capturing image with OpenCV, image comes half green

I am using a common logitech webcam with OpenCV. When I was using my RPI3 I had no trouble, but I wanted to improve my system so I bought a RPI4. Upon setting up my system with RPI4 using raspian ...
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22 views

Stream Webcam to Windows pc

Does anyone know how I can stream the webcam from my raspberrypi to my windows pc via wifi? Ive tried gstreamer but this just doesnt work for me and ive read the performance is really bad. there ...
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1answer
79 views

Flask app takes 60% CPU on Raspberry Pi Zero W

I am developing Flask rover app on Raspberry Pi Zero W. And I having problems with CPU perfomance. I used flask profiller to find weak spot in my app, but everything seemed normal. I have Raspberry ...
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1answer
147 views

imutils VideoStream(src=0) return VIDIOC_QBUF: Invalid argument in raspberry pi

I am only doing a simple code in my Raspberry Pi 4: from imutils.video import VideoStream # initialize the video streams and allow them to warmup print("[INFO] starting cameras...") webcam = ...
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0answers
35 views

Webcam FPS Very Low

I just plugged in a Microsoft Lifecam Studio webcam into my Raspberry Pi 4 Model B. I used gucview to test it out along with Google Hangouts for video conferencing (in Chromium) but the FPS was ...
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114 views

Assign multiple webcams to fixed /dev/video* at boot

I'm currently working on a project that requires taking pictures with 3 USB webcams but whenever I boot the raspberry, it assigns randomly a /dev/video "address" to each one of them. I'm not using ...
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316 views

VLC stream RTSP USB webcam

I'm trying to stream a usb camera using VLC. I used this page to get it working on a pi zero with a raspberry pi camera attached to it. On a second RPI 3B+ I'd like to do the same only with a USB ...
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0answers
38 views

I don't know why suddenly mjpg-streamer and webcam stop working

I have made a program that uses three webcams and three ultrasonic sensors using raspberry pi 3 and python 3. When each ultrasonic sensors detect stuff in front of them, webcam take a picture of it. ...
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200 views

VLC cannot read mjpeg video produced over USB webcam

I'm trying to use vlc to transcode a mjpeg stream from a USB camera connected to a raspberry pi 3B+, however VLC seems unable to read the mjpeg video stream from the camera, I already checked the v4l2-...
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1answer
56 views

Allow more power for USB Devices?

Is there a way to allow more power to USB Devices powered by the Pi I have a model B+, and I am unable to power my Webcam plugged into the Pi it has a single USB Connection so there's no way to power ...
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43 views

USB Inspection camera

I have a USB Inspection camera, identified as "Silicon Motion, Inc. - Taiwan (formerly Feiya Technology Corp.) 300k Pixel Camera" This is mounted at /dev/video0 and I can capture stills using ...
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0answers
45 views

video flickering while streaming with uvc-gadget and g_webcam on raspberry pi 3b+

I am using raspberry pi zero w emulated as a webcam using uvc-gadget. It works plug and play on Nvidia-jetson-nano, or any other pc or laptop. But I see too many choppy frames when I use it with my ...
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600 views

Single webcam using /dev/video0 and /dev/video1

With just one webcam attached, I get two devices: /dev/video0 and /dev/video1 They appear to have identical attributes. It's random which one gets bound to which entry, and only 1 of them actually ...
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15 views

Permission Problems with Motion

I'm new to the field and wanted to use Motion to turn my webcam into a surveillance camera. But I can't start Motion. I always get this error message and I don't know what to do. I'm grateful for any ...
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20 views

C920 cannot register after removing uv4l

I have a pi 3b+ running Raspbian stretch. c920 had been working out of box with the official v4l2 driver. I install UV4L to play with the webrtc features. But found some problems. So I did an apt ...
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134 views

RaspberryPi 3 B+: Error in running two webcams simultaneously

I purchased two webcams (Logitech C310 HD Webcam) to use with RaspberryPi (RPi 3 B+ model). When I run individual cameras, they are running fine but when I tried to run both cameras at the same time ...
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481 views

Raspberry Pi 3 B+: Many video devices are showing

I attached two webcams to RaspberryPi 3B+ using USB power hub. But when I wrote ls -la /dev/video* in Terminal, output shows many video devices as shown below: crw-rw----+ 1 root video 81, 0 Jun 7 ...
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0answers
211 views

webcam issue after UV4L installation

I am trying to make a usb webcam work on my rpi but it drives my nuts. I have Rpi 3 model B+ Also I've downloaded the newest raspbian image (stretch with desktop and recommended software). It's ...
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384 views

Error opening USB Cam with OpenCV4: GStreamer-CRITICAL **: gst_element_get_state: assertion 'GST_IS_ELEMENT (element)' failed

After installing OpenCV4.0 on my RPi, i tried a simple script below with a Logitech USB Cam (720p) but at "cam = cv2.VideoCapture(0)" it gives me an error "(python:num process): GStreamer-CRITICAL **: ...
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0answers
35 views

The first picture I take with a USB webcam as soon as I connect it looks good, but the following ones are dark

I am experiencing the following issue: I connect a USB webcam (Logitech Quickcam Pro 4000) to my Raspberry Pi 3 B+ and take a picture using fswebcam and looks good. Sometimes I take a second picture,...
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0answers
34 views

How to connect/link two raspberry pies for video precessing?

i am fairly new to raspberry pi platform so this question may be too basic. I am working on a project where i need at least 2 camera modules for simultaneous video recording and processing and taking ...
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2answers
289 views

Running pygame and webcam works from command line not when using a service

I am writing a small program for a Museum display that captures a still from a webcam, displays it on screen, waits a few seconds and takes another, loop forever. This all works fine from the command ...
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1answer
2k views

how to increase fps for raspberry pi for object detection

I'm having low fps for real-time object detection on my raspberry pi I trained the yolo-darkflow object detection on my own data set using my laptop running windows 10. When I tested the model for ...
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0answers
67 views

High CPU usage from PyGame with time.sleep

so I'm running a very rudimentary webcam surveillance program with PyGame, that just takes a picture from the webcam, stamps the time and saves it in an endless loop. (and does some simple date ...
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1answer
570 views

What happens if I force_turbo (and over_voltage) but do not increase ARM, etc

I have had issues with running RPI cam control and pikrell cam on Pi Zero W and found a post where it was recommended to use: over_voltage=4 force_turbo=1 (https://www.raspberrypi.org/forums/...
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0answers
303 views

Tensorflow object detection script is being killed by system

I'm trying to run an object detection script using Tensorflow. After running the python script it's being killed or freezes. I can see camera's light is being turned on right before the script stops. ...
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0answers
1k views

Stream USB webcam with audio

I have a raspberry pi zero with a Logitech C920 webcam. I am hoping to do a video server (baby monitor) with these. I hope to use the H.264 encoding provided by the C920 and combine it with the audio ...
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0answers
362 views

Live video streaming over bluetooth

I'm currently making a little project, and i need my Raspberry Pi 3b to transmit an USB webcam stream trough Bluetooth to display to an Android smartphone or any other portable device (like another ...
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1answer
36 views

Only allow a specific peripheral to be connected to a USB port

I am turning my raspberry pi prototype device into a market product. The data and the program running on the pi must be protected. But we have a USB webcam attached to it (provided by us, hence we ...
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0answers
604 views

PS3 Eye USB Camera Not Detected - Raspbian Stretch

After updating to Raspbian Stretch (kernel 4.14.90-v7+), my Playstation 3 Eye camera is no longer detected on any of the three Pi3 Model Bs that I have. lsusb does not report the device and dmesg ...
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1answer
513 views

Raspberry Pi Zero as webcam

I read some case, like using dwc2 and g_webcam in /boot/config and cmdline. but hard to understand and doesn't work. and can't find a tutorial, there are some tutorials only about serial and ethernet. ...
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1answer
380 views

Octo print with Pi Cam works fine, added webcam but can't find the Pi cam any more

I've been using my raspberry pi cam module wonderfully for a while and it's attached to the corner of my print bed so I can monitor the first few layers and general build. I want to add a webcam to do ...
2
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1answer
674 views

USB cam with raspberry pi 3: achieving maximum FPS

I am using a ub camera with raspberry pi. When I run v4l2-ctl --list-formats-xext, I get the max FPS is 15 with resolution of 2592x1944. However when I run ffmpeg -t 5 -f v4l2 -framerate 15 -...
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0answers
1k views

PS3 eye's 4ch microphone with the Raspberry Pi

Recently I have been trying to get the 4ch microphone on the sony playstation 3 eye to work with my Raspberry Pi 3B (running the latest OS of raspian-stretch to date (2018-06-27 version) as a part of ...
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1answer
2k views

Raspbian Stretch C920 webcam driver LED control regression?

In a previous Stack Overflow post (April 16th 2018), Raspberry Pi : use VLC to stream webcam : Logitech C920 [H264 Video without transcoding + Audio + LED control], I described how to use the Pi + ...
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0answers
826 views

UV4L & USB Webcam - How to change Resolution, FPS etc?

I've been using UV4L for streaming for quite a while now and think it does a brilliant job, especially with the PiCamera 2 module. I now want to use the program with a USB Webcam as a few days ago I ...
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1answer
720 views

QCamera get error “mesa-loader failed to retrieve device information”

Qt test code: QCamera* camera = new QCamera; auto viewfinder = new QCameraViewfinder(); camera->setViewfinder(viewfinder); viewfinder->show(); camera->start(); Output: mesa-loader failed ...
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1answer
82 views

Raspberry PI2 under voltage with a standard microsoft webcam connected.

I am attempted to setup my octopi IOS to connect to my 3d printer. I've got everything connected and configured however, noticed during the boot process, when the USB webcam is connected, i get the ...
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1answer
306 views

Barcode Scanning Raspberry PI

I want be able to scan barcodes using my raspberry pi 3, there are serveral barcode scanner/modules, but these are quite expensive. Would it be a option to use a webcam and use maybe a API which reads ...
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1answer
179 views

Unable to connect access IP webcam

I'm trying to access my phone camera using IP Webcam android app. I'm programming Pi using my laptop via Remote Desktop Connection with a static IP set for Pi. Also I tried to stream webcam from Pi's ...
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0answers
160 views

HD video streaming via webcam very choppy

I've tried Cheese and GuvcView, but both are extremely choppy. When I open open GuvcView even if I try and set FPS to 24/sec it only will give me 3 FPS. I am remoting into the RP3 via TeamViewer. ...
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0answers
1k views

Getting UV4L working with USB camera

I have installed the UV4L suite of software onto RPi3 with Jessie. I am using a USB cam (Logitech C170) rather than RPi cam. I have been struggling to get this working reliably. Initially I could ...
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3answers
2k views

I want to webcam stream 24/7 to open Internet

I am a teacher, and we are using a 3-D printer. I have a Raspberry Pi 3 Model B, as well as the Webcam Module Version 2, and I have the camera set up and can see video by typing in localhost:8081 into ...
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1answer
2k views

Problem with every even photo using USB camera

I use Raspberry Pi 3 with Linux RaspberryPi 4.9.59-v7+ onboard together with Logitech HD Webcam C270. It works quite well, I am able to preview video stream in Qt V4l2 Test Utility, take a photo with ...
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1answer
659 views

Two Webcams Taking Stills

I’m a bit of a novice, needing to do this for a university project. I need to connect two USB webcams to the RPi and get each to take a still image and save it in “%iimg%i” naming notation to identify ...
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2answers
99 views

Virtual Reality with RPi 3

I am working on a project in which I am trying to combine two seperate USB webcamera's to create a pair for virtual 360 degree footage. Can RPi 3 encode this video and send it to a smartphone ...
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0answers
288 views

c310 logitech webcam not closing properly in pygame code

I'm accessing my c310 logitech webcam in python with pygame in an attempt to take pictures and save them. My final goal is to take a new picture every minute for 24 hours to make a timelapse. Here is ...
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0answers
875 views

RTSP Webcam stream video+audio

Im trying to stream audio and video using cvlc from a Logitech C920 using RTSP, I have got video to work but not audio. cvlc --sout=#rtp{sdp=rtsp://:8554/} 'v4l2:///dev/video0:chroma=H264:width=1280:...
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0answers
469 views

Want to find difference between two frames, but get a lot of noise because of the auto changing on exposure, brightness…(not sure) of the webcam

As title, I tried to use Raspberry Pi + logitech webcam to find the difference between two frames, the following is the code that I used: import cv2 #capture from camera at location 0 cap = cv2....
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0answers
902 views

Stream a camera, and get the video feed on Java

For my project, I have two USB cameras. I would like to plug them to the Raspberry Pi to stream over the internet. Also, I am developing a software in Java, and these videos streams (2) have to be ...