Media streaming via RTP fully functional.

data/stream.sdp

@@ -6,4 +6,4 @@ t=0 0
 a=tool:libavformat 58.29.100
 m=audio 1234 RTP/AVP 97
 b=AS:800
-a=rtpmap:97 PCMU/50000/2
+a=rtpmap:97 PCMU/32000/2

radio.py

@@ -11,6 +11,7 @@ import struct
 class Radio:
     FORMAT = 'CS16'
     SAMPLES = 8192
+    PORT = 5001
 
     def __init__(self, device_info):
         self.device_info = device_info
@@ -76,7 +77,7 @@ class Radio:
 
     def _init_stream(self):
         self.playback = subprocess.Popen(
-            ['/usr/bin/sox', '-t', 'raw', '-r', '32000', '-b', '16', '-c', '2', '-L', '-e', 'signed-integer', '-', '-d'],
+            ['/usr/bin/ffmpeg', '-f', 's16le', '-ar', '32000', '-ac', '2', '-i', '-', '-f', 'rtp', f'rtp://localhost:{Radio.PORT}'],
             stdin=subprocess.PIPE,
             stdout=subprocess.DEVNULL,
             stderr=subprocess.DEVNULL
@@ -120,7 +121,7 @@ if __name__ == '__main__':
     print('Stream started.')
 
     # Let the stream play for a while
-    time.sleep(5)
+    time.sleep(15)
 
     print('Ending stream...')
     sdr.end_stream()