Add desired frame interval argument for `/bypass` endpoint

camdetect.py

@@ -17,6 +17,7 @@ from prometheus_client import Counter, Gauge
 from sanic import Sanic, response
 from sanic.response import stream
 from sanic_prometheus import monitor
+from time import time
 
 _, url = sys.argv
 
@@ -375,9 +376,16 @@ app = Sanic("camdetect")
 
 @app.route("/bypass")
 async def bypass_stream_wrapper(request):
+    # Desired frame interval, by default 500ms
+    interval = float(request.args.get("interval", 500)) / 1000.0
     async def stream_camera(response):
+        ts = 0
         while True:
-            await app.ctx.event_frame.wait()
+            while True:
+                await app.ctx.event_frame.wait()
+                if time() > ts + interval:
+                    break
+            ts = time()
             data = CHUNK_BOUNDARY + app.ctx.last_frame
             await response.write(data)
             counter_tx_bytes.inc(len(data))