Questions tagged [webcam]
A webcam is a device that records video and then uploads that video to a computer.
200
questions
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25 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
21 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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18 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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0answers
80 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
26 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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0answers
115 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-...
1
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1answer
51 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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0answers
36 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
39 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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0answers
333 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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0answers
13 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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13 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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0answers
69 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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327 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
154 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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0answers
325 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
29 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 ...
1
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1answer
207 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 ...
2
votes
1answer
1k 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
54 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 ...
1
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1answer
416 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
276 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
839 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
293 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 ...
1
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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
501 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
467 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.
...
1
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1answer
340 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
637 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 ...
1
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1answer
1k 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
744 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 ...
0
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1answer
665 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 ...
0
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1answer
78 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 ...
0
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1answer
282 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 ...
0
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1answer
169 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 ...
0
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0answers
156 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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vote
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 ...
2
votes
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 ...
0
votes
1answer
1k 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 ...
0
votes
1answer
621 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 ...
0
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2answers
89 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
269 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
824 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
437 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....
2
votes
0answers
865 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 ...
1
vote
1answer
456 views
using an rpi as IP camera with minimal CPU usage?
I'm trying to get a pi happening as an IP camera, using a CSI camera module. I'd like to minimise CPU usage. I don't need motion detection, just to dump an image from the camera onto the network where ...
0
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0answers
454 views
Configuring USB Webcam in Raspberry PI
I'm configuring Logitech C920 USB Webcam in Raspian for using it with a 3rd party application.
I get the below error
I tried to set exposure control using uvcdynctrl and guvcview as well.
I'm able to ...
0
votes
1answer
408 views
Raspberry Pi as HDMI to USB converter for HD Camcorder
I know this is a long shot, but is it possible to use the HDMI port of the Raspberry Pi as an input from an HD camcorder, and use a USB port as an output for another device (like a laptop) to use as a ...
