VLC Set Callback example

import vlc
import ctypes
import time
import sys
import numpy as np

from PIL import Image

VIDEOWIDTH = 1920
VIDEOHEIGHT = 1080
URI0 = 'rtsp://184.72.239.149/vod/mp4:BigBuckBunny_175k.mov'
CorrectVideoLockCb = ctypes.CFUNCTYPE(ctypes.c_void_p, ctypes.c_void_p, ctypes.POINTER(ctypes.c_void_p))

# global hastable to look up video readers
VLCReader_Table = {}

class VLCReader:
    def __init__(self,uri=URI0):
        global VLCReader_Table
        _params = '-I dummy --ignore-config --no-audio --verbose 0 --rtsp-tcp'
        self.instance = vlc.Instance(_params)
        self.mp = self.instance.media_player_new()
        self.media = self.instance.media_new(uri)
        self.mp.set_media(self.media)
        self.size = VIDEOHEIGHT*VIDEOWIDTH*3
        self.buf = (ctypes.c_ubyte*self.size)()
        self.buf_p = ctypes.cast(self.buf, ctypes.c_void_p)
        self.frame_num = 0
        mem_addr = self.buf_p.value
        VLCReader_Table[mem_addr] = self
        vlc.libvlc_video_set_callbacks(self.mp, self._lockcb, None, self._display, self.buf_p)
        self.mp.video_set_format("RV24", VIDEOWIDTH, VIDEOHEIGHT, VIDEOWIDTH * 3)

    @CorrectVideoLockCb
    def _lockcb(opaque, planes):
        global VLCReader_Table
        _obj = VLCReader_Table[opaque]
        planes[0] = _obj.buf_p

    @vlc.CallbackDecorators.VideoDisplayCb
    def _display(opaque, picture):
        global VLCReader_Table
        _obj = VLCReader_Table[opaque]
        _obj.frame_num += 1
        img = Image.frombuffer("RGB", (VIDEOWIDTH, VIDEOHEIGHT), _obj.buf, "raw", "BGR", 0, 1)
        _obj.img = np.array(img)

    def play(self,showtime=10):
        self.mp.play()

    def frame(self):
        return self.img

if __name__ == "__main__":
    import cv2

    lk = URI0

    vr = VLCReader(uri=lk)

    vr.play()
    time.sleep(5)

    while True:
        m = vr.frame()
        if m is None:
            print("wtf")
        else:
            print(m.shape)
            print(m)