Ubuntu opencv camera error












1















I am using Ubuntu 18 in Virtualbox and I am doing objectdetection project in ubunut but I am trying to open camera using opencv,
its showing error :VIDEOIO ERROR: V4L: can't find camera device
Segmentation fault (core dumped)



please help me how to open camera using opencv in Ubuntu



enter code here

import numpy as np
import cv2

cap = cv2.VideoCapture(-1)

while(True):

ret, frame = cap.read()

gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)

cv2.imshow('frame',gray)
if cv2.waitKey(1) & 0xFF == ord('q'):
break

cap.release()
cv2.destroyAllWindows()


and also I am trying this



sudo modprobe bcm2835-v4l2


to change the module it shows another error :



FATAL: Module bcm2835-v4l2 not found in directory /lib/modules/4.15.0-45-generic









share|improve this question























  • Did you set up Webcam Passthrough from the host to the guest OS?

    – steeldriver
    Feb 16 at 10:11
















1















I am using Ubuntu 18 in Virtualbox and I am doing objectdetection project in ubunut but I am trying to open camera using opencv,
its showing error :VIDEOIO ERROR: V4L: can't find camera device
Segmentation fault (core dumped)



please help me how to open camera using opencv in Ubuntu



enter code here

import numpy as np
import cv2

cap = cv2.VideoCapture(-1)

while(True):

ret, frame = cap.read()

gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)

cv2.imshow('frame',gray)
if cv2.waitKey(1) & 0xFF == ord('q'):
break

cap.release()
cv2.destroyAllWindows()


and also I am trying this



sudo modprobe bcm2835-v4l2


to change the module it shows another error :



FATAL: Module bcm2835-v4l2 not found in directory /lib/modules/4.15.0-45-generic









share|improve this question























  • Did you set up Webcam Passthrough from the host to the guest OS?

    – steeldriver
    Feb 16 at 10:11














1












1








1








I am using Ubuntu 18 in Virtualbox and I am doing objectdetection project in ubunut but I am trying to open camera using opencv,
its showing error :VIDEOIO ERROR: V4L: can't find camera device
Segmentation fault (core dumped)



please help me how to open camera using opencv in Ubuntu



enter code here

import numpy as np
import cv2

cap = cv2.VideoCapture(-1)

while(True):

ret, frame = cap.read()

gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)

cv2.imshow('frame',gray)
if cv2.waitKey(1) & 0xFF == ord('q'):
break

cap.release()
cv2.destroyAllWindows()


and also I am trying this



sudo modprobe bcm2835-v4l2


to change the module it shows another error :



FATAL: Module bcm2835-v4l2 not found in directory /lib/modules/4.15.0-45-generic









share|improve this question














I am using Ubuntu 18 in Virtualbox and I am doing objectdetection project in ubunut but I am trying to open camera using opencv,
its showing error :VIDEOIO ERROR: V4L: can't find camera device
Segmentation fault (core dumped)



please help me how to open camera using opencv in Ubuntu



enter code here

import numpy as np
import cv2

cap = cv2.VideoCapture(-1)

while(True):

ret, frame = cap.read()

gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)

cv2.imshow('frame',gray)
if cv2.waitKey(1) & 0xFF == ord('q'):
break

cap.release()
cv2.destroyAllWindows()


and also I am trying this



sudo modprobe bcm2835-v4l2


to change the module it shows another error :



FATAL: Module bcm2835-v4l2 not found in directory /lib/modules/4.15.0-45-generic






virtualbox lubuntu webcam camera opencv






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Feb 16 at 7:10









Suresh MithunSuresh Mithun

62




62













  • Did you set up Webcam Passthrough from the host to the guest OS?

    – steeldriver
    Feb 16 at 10:11



















  • Did you set up Webcam Passthrough from the host to the guest OS?

    – steeldriver
    Feb 16 at 10:11

















Did you set up Webcam Passthrough from the host to the guest OS?

– steeldriver
Feb 16 at 10:11





Did you set up Webcam Passthrough from the host to the guest OS?

– steeldriver
Feb 16 at 10:11










0






active

oldest

votes











Your Answer








StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "89"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});

function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});


}
});














draft saved

draft discarded


















StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2faskubuntu.com%2fquestions%2f1118702%2fubuntu-opencv-camera-error%23new-answer', 'question_page');
}
);

Post as a guest















Required, but never shown

























0






active

oldest

votes








0






active

oldest

votes









active

oldest

votes






active

oldest

votes
















draft saved

draft discarded




















































Thanks for contributing an answer to Ask Ubuntu!


  • Please be sure to answer the question. Provide details and share your research!

But avoid



  • Asking for help, clarification, or responding to other answers.

  • Making statements based on opinion; back them up with references or personal experience.


To learn more, see our tips on writing great answers.




draft saved


draft discarded














StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2faskubuntu.com%2fquestions%2f1118702%2fubuntu-opencv-camera-error%23new-answer', 'question_page');
}
);

Post as a guest















Required, but never shown





















































Required, but never shown














Required, but never shown












Required, but never shown







Required, but never shown

































Required, but never shown














Required, but never shown












Required, but never shown







Required, but never shown







Popular posts from this blog

flock() on closed filehandle LOCK_FILE at /usr/bin/apt-mirror

Mangá

Eduardo VII do Reino Unido