I would like to play a video in openCV using python and close that window at any time, but it is not working.
import numpy as np
import cv2
fileName='test.mp4' # change the file name if needed
cap = cv2.VideoCapture(fileName) # load the video
while(cap.isOpened()):
# play the video by reading frame by frame
ret, frame = cap.read()
if ret==True:
# optional: do some image processing here
cv2.imshow('frame',frame) # show the video
if cv2.waitKey(1) & 0xFF == ord('q'):
break
else:
break
cv2.waitKey(1)
cv2.destroyAllWindows()
cv2.waitKey(1)
The window opens and starts playing the video, but I cannot close the window.
You can use cv2.getWindowProperty('window-name', index) to detect if the window is closed. I'm not totally sure about the index but this worked for me:
import cv2
filename = 'test.mp4'
cam = cv2.VideoCapture(filename)
while True:
ret, frame = cam.read()
if not ret:
break
cv2.imshow('asd', frame)
cv2.waitKey(1)
if cv2.getWindowProperty('asd', 4) < 1:
break
Related
I want to save a video after converting to gray scale. I don't know where exactly put the line out.write(gray_video). I use jupyter notebook with Python 3, and the Opencv library.
the code is:
import cv2
import numpy as np
video = cv2.VideoCapture("video1.mp4")
fourcc = cv2.VideoWriter_fourcc(*'XVID')
out = cv2.VideoWriter('out_gray_scale.mp4', fourcc, 10.0, (640, 480),0)
while (True):
(ret, frame) = video.read()
if not ret:
print("Video Completed")
break
# Convert the frames into Grayscaleo
gray_video = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
#writing
gray_frame = cv2.flip(gray_video, 0)
out.write(gray_video) #it suppose to save the gray video
#Show the binary frames
if ret == True:
cv2.imshow("video grayscale",gray_video)
#out.write(gray_video)
# Press q to exit the video
if cv2.waitKey(25) & 0xFF == ord('q'):
break
else:
break
video.release()
cv2.destroyAllWindows()
The working video writer module of OpenCV depends on three main things:
the available/supported/installed codecs on the OS
getting the right codec and file extension combinations
the input video resolution should be same as output video resolution otherwise resize the frames before writing
If any of this is wrong openCV will probably write a very small video file which will not open in video player. The following code should work fine:
import cv2
import numpy as np
video = cv2.VideoCapture("inp.mp4")
video_width = int(video.get(cv2.CAP_PROP_FRAME_WIDTH)) # float `width`
video_height = int(video.get(cv2.CAP_PROP_FRAME_HEIGHT)) # float `height`
video_fps = int(video.get(cv2.CAP_PROP_FPS))
print(video_width, video_height, video_fps)
fourcc = cv2.VideoWriter_fourcc('M','J','P','G')
out = cv2.VideoWriter('out_gray_scale1.avi', fourcc, video_fps, (video_width, video_height),0)
while (True):
ret, frame = video.read()
if not ret:
print("Video Completed")
break
# Convert the frames into Grayscale
gray_video = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
#Show the binary frames
if ret == True:
cv2.imshow("video grayscale",gray_video)
#Writing video
out.write(gray_video)
# Press q to exit the video
if cv2.waitKey(25) & 0xFF == ord('q'):
break
else:
break
video.release()
out.release()
cv2.destroyAllWindows()
Gets error when trying to open livestream.
I'm streaming this from my raspberry pi to my view it on windows so I can run opencv and yolo.
Is there a way to do this with opencv?
import cv2
cap = cv2.VideoCapture('http://______/html/#')
while True:
ret, frame = cap.read()
cv2.imshow("frame", frame)
key = cv2.waitKey(50)
if key == 27:
break
cv2.destroyAllWindows()
So the URL I was trying to connect to had a little display of the livestream from the raspberry pi and the settings under it. What I had to do along with the code from this answer was right click on the live stream display, open it up in another tab and use the URL from that tab. It's about 2-3 seconds off though.
https://stackoverflow.com/a/57539561/17280268
import cv2
cap = cv2.VideoCapture('http://345.63.46.1256/html/cam_pic_new.php?time=1642941457007&p')
#^^ Opened in new tab URL ^^
#cap = cv2.VideoCapture('http://345.63.46.1256/html/')
cv2.namedWindow('live cam', cv2.WINDOW_NORMAL)
while(True):
ret, frame = cap.read()
#img_resize = cv2.resize(frame, (960, 540))
cv2.imshow('live cam', frame)
if cv2.waitKey(50) & 0xFF == ord('q'):
break
cap.release()
cv2.destroyAllWindows()
I'm new to OpenCV and just started learning
I am using macOS, python version 3.8.1
My code:
import cv2
# takes facecam video
cap = cv2.VideoCapture(-1)
while True:
# Capture frame-by-frame
ret, frame = cap.read()
if cap.isOpened() == True:
# Our operations on the frame come here
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
# Display the resulting frame
cv2.imshow('frame',gray)
if cv2.waitKey(1) & 0xFF == ord('q'):
break
else:
cap.open(-1)
# When everything done, release the capture
cap.release()
cv2.destroyAllWindows()
This works for me
import cv2
cap = cv2.VideoCapture(0)
while True:
ne, frame = cap.read()
cv2.imshow("Webcam Capture", frame)
if cv2.waitKey(1) & 0xFF == ord("A"):
break
cap.release()
cv2.destroyAllWindows()
i am trying to play a video using cv2 but it's only showing one frame and the video disappears
import cv2
img_file = 'car image.jpg'
video = cv2.VideoCapture('Tesla Dashcam AccidentTrim.mp4')
while True:
(read_successful, frame) = video.read()
if read_successful:
grayscaled_frame = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
else:
break
classifier_file = 'car_detector.xml'
#Display the image with the faces spotted
cv2.imshow('Newton Caffrey Face Detector', grayscaled_frame)
#Don't Autoclose here (wait here in the code and listen for a key press)
cv2.waitKey(1)
I used the following code for displaying the video using cv2. It will keep displaying frames untill video ends. hope this will work for you, peace!
import cv2
cap = cv2.VideoCapture("Video.mp4")
width = 400
height = 300
num = 0
while True:
ret, frame = cap.read()
if ret:
frame = cv2.resize (frame, (width, height))
cv2.imshow("frame", frame)
if cv2.waitKey(1) & 0xff == ord('q'):
break
cv2.destroyAllWindows()
I am trying to have access to the stream of my drone's camera.
Here my code:
import cv2
import numpy
import libardrone
drone = libardrone.ARDrone()
cap = drone.image
while(True):
cap = drone.image
if not cap:
continue
ret, frame = convert
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
cv2.imshow('frame',gray)
if cv2.waitKey(1) & 0xFF == ord('q'):
break
cap.release()
cv2.destroyAllWindows()
It does not work. It does not open any frame where I can see the stream video of my drone's camera.
What's wrong? Do you have any suggestions?
Thank you!
import cv2
cam = cv2.VideoCapture('tcp://192.168.1.1:5555')
running = True
while running:
# get current frame of video
running, frame = cam.read()
if running:
cv2.imshow('frame', frame)
if cv2.waitKey(1) & 0xFF == 27:
# escape key pressed
running = False
else:
# error reading frame
print 'error reading video feed'
cam.release()
cv2.destroyAllWindows()
Try this code...This works for me.