Strange output for cv2 captured frame
Hello. I have strange output from rtsp server. Is it proper launch_string for gst?
class SensorFactory(GstRtspServer.RTSPMediaFactory):
def __init__(self, **properties):
super(SensorFactory, self).__init__(**properties)
self.cap = cv2.VideoCapture('rtsp://192.168.1.40:5555/main/ch1')
self.number_frames = 0
self.fps = 30
self.duration = 1 / self.fps * Gst.SECOND # duration of a frame in nanoseconds
self.launch_string = 'appsrc name=source is-live=true block=true format=GST_FORMAT_TIME ' \
'caps=video/x-raw,format=BGR,width=480,height=360,framerate={}/1 ' \
'! videoconvert ! video/x-raw,format=I420 ' \
'! x264enc speed-preset=ultrafast tune=zerolatency' \
'! rtph264pay config-interval=1 name=pay0 pt=96'.format(self.fps)
def on_need_data(self, src, lenght):
if self.cap.isOpened():
ret, frame = self.cap.read()
if ret:
data = frame.tostring()
buf = Gst.Buffer.new_allocate(None, len(data), None)
buf.fill(0, data)
buf.duration = self.duration
timestamp = self.number_frames * self.duration
buf.pts = buf.dts = int(timestamp)
buf.offset = timestamp
self.number_frames += 1
retval = src.emit('push-buffer', buf)
print('pushed buffer, frame {}, duration {} ns, durations {} s'.format(self.number_frames,
self.duration,
self.duration / Gst.SECOND))
if retval != Gst.FlowReturn.OK:
print(retval)