controls and camera switching

dummy_streams.py

@@ -0,0 +1,50 @@
+#!/usr/bin/env python3
+import av
+import numpy as np
+import cv2
+import asyncio
+from aiortc import VideoStreamTrack
+from aiortc.mediastreams import AudioStreamTrack
+
+class DummyVideoStreamTrack(VideoStreamTrack):
+    async def recv(self):
+        pts, time_base = await self.next_timestamp()
+        frame = None
+        while frame is None:
+            numpy_frame = np.zeros((480, 640, 3), dtype=np.uint8)
+            cv2.putText(numpy_frame, "hello", (200, 240), cv2.FONT_HERSHEY_SIMPLEX, 1, (255, 255, 255), 2)
+            frame = av.VideoFrame.from_ndarray(numpy_frame, format="bgr24")
+    
+        frame.pts = pts
+        frame.time_base = time_base
+        return frame
+
+class DummyAudioStreamTrack(AudioStreamTrack):
+    pass
+
+if __name__ == "__main__":
+    from time import time_ns
+    import sys
+
+    async def test():
+        frame_count=0
+        start_time=time_ns()
+        track = DummyVideoStreamTrack()
+        while True:
+            await track.recv()
+            now = time_ns()
+            playtime = now - start_time
+            playtime_sec = playtime * 0.000000001
+            if playtime_sec >= 1:
+                print(f'fps: {frame_count}')
+                frame_count = 0
+                start_time = time_ns()
+            else:
+                frame_count+=1
+
+    # Run event loop
+    loop = asyncio.new_event_loop()
+    try:
+        loop.run_until_complete(test())
+    except KeyboardInterrupt:
+        sys.exit(0)