Cv2.videocapture(0) opencv Webcam not opening Using Flask in Render Server. how to fix it?

cap = cv2.VideoCapture(0)

Error
global obsensor_uvc_stream_channel.cpp:159 getStreamChannelGroup Camera index out of range

Render container instances do not have Webcams attached.

but localy works fine your server via facing the issue how can i fix it

Your computer has a webcam, a remote server does not.