Pulling Youtube Video

[leehanchung]

Copy and pasted your code from :github. The code fail to work. Seems like its returning some None frames similar to feeding cv2 w/ links generated using Pafy.

CODE:

import cv2

stream = CamGear(source='https://youtu.be/dQw4w9WgXcQ', y_tube =True,  time_delay=1, logging=True).start() # YouTube Video URL as input

# infinite loop
while True:

    frame = stream.read()
    # read frames

    # check if frame is None
    if frame is None:
        #if True break the infinite loop
        break

    # do something with frame here

    cv2.imshow("Output Frame", frame)
    # Show output window

    key = cv2.waitKey(1) & 0xFF
    # check for 'q' key-press
    if key == ord("q"):
        #if 'q' key-pressed break out
        break

cv2.destroyAllWindows()
# close output window

stream.stop()
# safely close video stream.

OUTPUT:

python vidgear_test.py 
Title: Rick Astley - Never Gonna Give You Up (Video)
Extension: webm

pipenv config:

[[source]]
name = "pypi"
url = "https://pypi.org/simple"
verify_ssl = true

[dev-packages]

[packages]
numpy = "*"
opencv-python = "*"
jupyter = "*"
tensorflow = "*"
pillow = "*"
matplotlib = "*"
youtube-dl = "*"
pafy = "*"
vidgear = "*"

[requires]
python_version = "3.6"

[abhiTronix]

@leehanchung Bug discovered in opencv-contrib-python or opencv-python python libraries !

Bug summary:

opencv-contrib-python python library's VideoCapture class fails to parse URL received from pafy directly. But strangely this bug doesn't exist on a machine with OpenCV installed from scratch.

Affected users:

Users with OpenCV installed with opencv-contrib-python or opencv-python python library from PyPi

Non-Affected users:

Users with OpenCV installed from scratch/source-code and not from PyPi

Test-Code:

import cv2
import pafy

video = pafy.new("dQw4w9WgXcQ")
object = video.getbestvideo()
url = object.url
print(url) #means pafy and youtube-dl working correctly

stream = cv2.VideoCapture(url)

# infinite loop
while True:
	(grabbed, frame) = stream.read()
	# read frames

	# check if frame empty
	if not grabbed:
		print('opencv is buggy')
		break

	cv2.imshow("Output Frame", frame)
	# Show output window

	key = cv2.waitKey(1) & 0xFF
	# check for 'q' key-press
	if key == ord("q"):
		#if 'q' key-pressed break out
		break

cv2.destroyAllWindows()
# close output window

stream.release()
# safely close video stream.

Temporary Workaround: 💡

Uninstall opencv-contrib-python python library and install OpenCV from Scratch

[abhiTronix]

Update:

I've addressed this bug on opencv-python repo. here.

[leehanchung]

Confirmed. Building opencv from scratch under Ubuntu 18.04 worked.

[abhiTronix]

Update:

Travis CLI Tests for VidGear will now use Travis OpenCV Binaries prebuilt from scratch, starting from commit 3b75132

[abhiTronix]

Update:

Due to delay from opencv-python repository author in fixing this issue, the milestone has been shifted to next v0.1.6 release.

[abhiTronix]

Update:

I've pushed a PR: opencv/opencv-python#229 to finally fix this bug.

[abhiTronix]

Update:

Successfully Resolved in commit opencv/opencv-python@eed0f0d . Binaries will be available soon. Then this issue will be closed.

TODO

• Update Docs.

[abhiTronix]

@leehanchung Binary Released on Pypi with this bug fixed: https://pypi.org/project/opencv-python/4.1.1.26/

Install it with:

sudo pip install -U python-opencv

Goodluck.