All Questions
18 questions
0
votes
0
answers
738
views
opencv starts capture with a big zoom
I am building a stereo vision system, but when I start my videoCapture with opencv, the frame is zoomed. Instead of showing the whole face with background for example, it only shows a big zoom to the ...
- 41
0
votes
0
answers
197
views
Freeze after read() 2 times using opencv4 videocapture object on the raspberry pi
Freeze after read() 2 times using opencv4 videocapture object on the raspberry pi.
details:
- Raspberrypi Jessie
- python 2.7 + opencv 4
- python code can be run on windows10 (py2.7 and opencv4) ...
- 57
0
votes
2
answers
2k
views
OpenCV VideoCapture on Large files looping back to the start frame after 4000+ frames
import matplotlib.pyploy as plt
import cv2
def getFrame(cap):
frameRate = 25
frameId = cap.get(cv2.CAP_PROP_POS_FRAMES)
ret, frame = cap.read()
if not ret:
return None
...
2
votes
3
answers
744
views
OpenCV 2.4.9 VideoCapture() won't Read Video File in Enthought Python 2.7 Environment
I've been having issues getting OpenCV 2.4.9 to read (and show) a video file using python. I know it's not a problem with finding the file because I was able to get cv2.imread() to read an image from ...
- 21
0
votes
2
answers
3k
views
Read after Videocapture on opencv always returns false
I cant figure out what the problem is.
I am using
Ubuntu 17.04
Python 2.7.13
OpenCV Version: 3.3.0
I have gone through all the related problems on internet but have not got the solution for the ...
0
votes
0
answers
993
views
first video frame has huge delay (python opencv)
Some background: I'm reading frames from a video capture device (webcam) and writing it to a video file (out.avi) with OpenCV in python. The script I've written is meant to be called from a Node.js ...
- 1,085
1
vote
0
answers
4k
views
Setting and getting properties of Python cv2.VideoCapture object does not work
I am trying to set the return format for a video stream from an Imaging Source DFK31AU03 USB 2.0 camera. When I get the video format using the following Python2 code:
import cv2
# Get a handle to ...
- 320
1
vote
0
answers
369
views
OpenCV - Coloring a specific area during video capture?
Here is my code:
import cv2
import numpy as np
cap = cv2.VideoCapture(1)
fourcc = cv2.VideoWriter_fourcc('M','J','P','G')
framesize = (640,480)
out = cv2.VideoWriter('dump.avi',fourcc,60.0,...
- 11
0
votes
1
answer
1k
views
How to acquire video feed in python using a wireless webcam setup on my android device?
Alright, so my basic aim is to do some video processing. But I want to do so in real time using the feed from a camera. I've downloaded this app on my android phone called IP webcam. Using this app I ...
- 444
0
votes
0
answers
294
views
Raspberry pi VideoCapture freezes while Recording
I have been trying to save the webcam stream of the raspberry pi using opencv videocapture.
My code is:
import wx
import vlc
import os
import user
import numpy as np
import time
import cv, cv2
...
- 334
13
votes
3
answers
14k
views
v4l2 Python - streaming video - mapping buffers
I'm working on a video capture script for Python in Raspbian (Raspberry Pi 2) and I'm having trouble using the Python bindings for v4l2, since I have no success on memory-maping the buffers.
What I ...
- 463
1
vote
2
answers
239
views
Video camera stream does not capture continuously
I have a program that reads from video camera, and finds the maximum color intensity of all the frames. I noticed that there is a dashed line effect when I streak a laser pointer across the camera ...
- 1,717
0
votes
2
answers
896
views
cv2 module is not capturing the image while the code is detecting the webcam
The code I used is:
import cv2
camera = cv2.VideoCapture(0)
im=camera.read()[1]
print im
for which I'm getting output as None
In some cases it is returning the RGB values but not every time i want....
- 113
12
votes
2
answers
42k
views
Can not Read or Play a Video in OpenCV+Python using VideoCapture
import cv2
import numpy as np
cap = cv2.VideoCapture('traffic.avi')
retval, frame = cap.read()
print retval
================ RESTART: J:\Python For DIP\traffic_video.py ================
False
>&...
- 2,264
0
votes
1
answer
3k
views
How do I display multiple webcam feeds side by side using OpenCV Beta 3.0.0 and Python?
I am working on a project that requires that I display 3 (and possibly more) webcam feeds side by side. To tackle this project, I am using OpenCV Beta 3.0.0 and Python 2.7.5 because I am slightly ...
