Here’s a RTSP stream to video widget. I would recommend creating another thread for obtaining the frames as cv2.VideoCapture.read() is blocking. This can be expensive and cause latency as the main thread has to wait until it has obtained a frame. By putting this operation into a separate thread that just focuses on grabbing frames and processing/saving the frames in the main thread, it dramatically improves performance. You also can experiment with other codecs but using MJPG should be safe since its built into OpenCV. I used my IP camera stream and saved the frames to output.avi. Be sure to change rtsp_stream_link to your own RTSP stream link. 🙂
from threading import Thread
import cv2
class RTSPVideoWriterObject(object):
def __init__(self, src=0):
# Create a VideoCapture object
self.capture = cv2.VideoCapture(src)
# Default resolutions of the frame are obtained (system dependent)
self.frame_width = int(self.capture.get(3))
self.frame_height = int(self.capture.get(4))
# Set up codec and output video settings
self.codec = cv2.VideoWriter_fourcc('M','J','P','G')
self.output_video = cv2.VideoWriter('output.avi', self.codec, 30, (self.frame_width, self.frame_height))
# Start the thread to read frames from the video stream
self.thread = Thread(target=self.update, args=())
self.thread.daemon = True
self.thread.start()
def update(self):
# Read the next frame from the stream in a different thread
while True:
if self.capture.isOpened():
(self.status, self.frame) = self.capture.read()
def show_frame(self):
# Display frames in main program
if self.status:
cv2.imshow('frame', self.frame)
# Press Q on keyboard to stop recording
key = cv2.waitKey(1)
if key == ord('q'):
self.capture.release()
self.output_video.release()
cv2.destroyAllWindows()
exit(1)
def save_frame(self):
# Save obtained frame into video output file
self.output_video.write(self.frame)
if __name__ == '__main__':
rtsp_stream_link = 'your stream link!'
video_stream_widget = RTSPVideoWriterObject(rtsp_stream_link)
while True:
try:
video_stream_widget.show_frame()
video_stream_widget.save_frame()
except AttributeError:
pass
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