fix typo on subscriber topic

mic1/mic.py

@@ -36,7 +36,7 @@ def on_connect(client, userdata, flags, rc):
 
     # Subscribing in on_connect() means that if we lose the connection and
     # reconnect then subscriptions will be renewed.
-    client.subscribe("video/cam1/#")
+    client.subscribe("video/mic1/#")
 
 
 # The callback for when a PUBLISH message is received from the server.
@@ -56,11 +56,11 @@ if __name__ == "__main__":
     Gst.init(None)
 
     SRC="alsasrc device=hw:CARD=CODEC,DEV=0 slave-method=resample do-timestamp=true"
-    p = """gst-launch-1.0 ${SRC} ! queue !\
+    p = """gst-launch-1.0 {SRC} ! queue !\
         audio/x-raw,format=S16LE,channels=2,rate=48000,layout=interleaved !\
-        audioconvert ! audioresample $DELAY !\
+        audioconvert ! audioresample !\
         matroskamux streamable=true !\
-        tcpclientsink host=${HOST} port=10002"""
+        tcpclientsink host={HOST} port=10002"""
     p = p.format(HOST="192.168.2.120", SRC=SRC)
     print(p)
     pipeline = Gst.parse_launch(p)