Flush ffmpeg audio stream packets

routes/listening_post.py

@@ -424,20 +424,25 @@ def _start_audio_stream(frequency: float, modulation: str):
             # Ensure we use the found rx_fm path
             sdr_cmd[0] = rx_fm_path
 
-        encoder_cmd = [
-            ffmpeg_path,
-            '-hide_banner',
-            '-loglevel', 'error',
-            '-f', 's16le',
-            '-ar', str(resample_rate),
-            '-ac', '1',
-            '-i', 'pipe:0',
-            '-acodec', 'libmp3lame',
-            '-b:a', '128k',
-            '-ar', '44100',
-            '-f', 'mp3',
-            'pipe:1'
-        ]
+        encoder_cmd = [
+            ffmpeg_path,
+            '-hide_banner',
+            '-loglevel', 'error',
+            '-fflags', 'nobuffer',
+            '-flags', 'low_delay',
+            '-probesize', '32',
+            '-analyzeduration', '0',
+            '-f', 's16le',
+            '-ar', str(resample_rate),
+            '-ac', '1',
+            '-i', 'pipe:0',
+            '-acodec', 'libmp3lame',
+            '-b:a', '128k',
+            '-ar', '44100',
+            '-f', 'mp3',
+            '-flush_packets', '1',
+            'pipe:1'
+        ]
 
         try:
             # Use shell pipe for reliable streaming