video lags

[zoldaten]

i see video on page but it is bit too laggy.
so i tried to rewrite two parts of camera.py:

from picamera.array import PiRGBArray
from picamera import PiCamera
class VideoCamera(object):
    def __init__(self, flip = False, file_type = ".jpg", photo_string = "photo-taken"):
        #self.vs = PiVideoStream(resolution=(640, 480), framerate=30)
        self.vs = PiCamera(resolution=(640, 480), framerate=30)
        self.rawCapture = PiRGBArray(self.vs)
        
        #self.vs.start()
        #self.vs = PiVideoStream().start()

and

def get_frame(self):
        #frame = self.flip_if_needed(self.vs.read())
        for frame in self.vs.capture_continuous(self.rawCapture, format="bgr"):
            #ret, jpeg = cv.imencode(self.file_type, frame)
            self.rawCapture.truncate(0) 
            self.image = frame.array
            ret, jpeg = cv.imencode(self.file_type, self.image)            
            #self.previous_frame = jpeg
            return jpeg.tobytes()

dont know if it start working a bit faster...
may be a better solution is io.BytesIO()
https://stackoverflow.com/questions/40065328/picameravalueerror-incorrect-buffer-length-for-resolution-1920x1080