我正在尝试用Python将OpenCV图像放入GStreamer RTSP服务器中。 我在编写MediaFactory时遇到了一些问题,我是Gst-rtsp-server的新手,而且文档很少,因此我不确定是否使用了正确的方法。我使用线程启动MainLoop,并使用主线程创建缓冲区以将其推送到MediaFactory管道的appsrc元素中。我采取的方法是正确的吗?有谁可以帮助我吗?我的代码如下:
from threading import Thread
from time import clock
import cv2
import gi
gi.require_version('Gst', '1.0')
gi.require_version('GstRtspServer', '1.0')
from gi.repository import Gst, GstRtspServer, GObject
class SensorFactory(GstRtspServer.RTSPMediaFactory):
def __init__(self, **properties):
super(SensorFactory, self).__init__(**properties)
self.launch_string = 'appsrc ! video/x-raw,width=320,height=240,framerate=30/1 ' \
'! videoconvert ! x264enc speed-preset=ultrafast tune=zerolatency ' \
'! rtph264pay config-interval=1 name=pay0 pt=96'
self.pipeline = Gst.parse_launch(self.launch_string)
self.appsrc = self.pipeline.get_child_by_index(4)
def do_create_element(self, url):
return self.pipeline
class GstServer(GstRtspServer.RTSPServer):
def __init__(self, **properties):
super(GstServer, self).__init__(**properties)
self.factory = SensorFactory()
self.factory.set_shared(True)
self.get_mount_points().add_factory("/test", self.factory)
self.attach(None)
GObject.threads_init()
Gst.init(None)
server = GstServer()
loop = GObject.MainLoop()
th = Thread(target=loop.run)
th.start()
print('Thread started')
cap = cv2.VideoCapture(0)
print(cap.isOpened())
frame_number = 0
fps = 30
duration = 1 / fps
timestamp = clock()
while cap.isOpened():
ret, frame = cap.read()
if ret:
print('Writing buffer')
data = frame.tostring()
buf = Gst.Buffer.new_allocate(None, len(data), None)
buf.fill(0, data)
buf.duration = fps
timestamp = clock() - timestamp
buf.pts = buf.dts = int(timestamp)
buf.offset = frame_number
frame_number += 1
retval = server.factory.appsrc.emit('push-buffer', buf)
print(retval)
if cv2.waitKey(1) & 0xFF == ord('q'):
break
cap.release()
顺便提一下,我尝试从OpenCV源代码中复制缓冲区创建的代码,但我不确定我是否正确地将C++代码翻译成Python。