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There are several ways to deal with numerous distorted frames while using an IP camera's rtsp stream with OpenCV in Python:

1. Increase the buffer size: You can increase the buffer size of the rtsp stream using the following code:

cap.set(cv2.CAP_PROP_BUFFERSIZE, 2)

This code increases the buffer size to 2 frames, which can reduce the number of distorted frames.

1. Use a lower resolution: The distortion may occur due to network bandwidth limitations, so you can try using a lower resolution instead of the full resolution of the camera.

cap.set(cv2.CAP_PROP_FRAME_WIDTH, 640)
cap.set(cv2.CAP_PROP_FRAME_HEIGHT, 480)

1. Check the camera settings: Sometimes, the distortion may occur due to incorrect camera settings. You can try adjusting the camera settings such as brightness, contrast, saturation, and hue.

2. Use a different codec: The rtsp stream may use a codec that is not supported by OpenCV. You can try changing the codec to a supported codec by using the following code:

cap.set(cv2.CAP_PROP_FOURCC, cv2.VideoWriter_fourcc('M', 'J', 'P', 'G'))

1. Use a different library: If the above methods do not work, you can try using a different library to capture the rtsp stream. Some alternatives to OpenCV include ffmpeg, GStreamer, and PyMedia.