git

pi/asound.conf

@@ -12,3 +12,14 @@ ctl.!default {
     type hw
     card 0
 }
+
+# Stable capture device for ffmpeg/roverd: exposes the HAT at fixed format/rate.
+pcm.rovermic {
+    type plug
+    slave {
+        pcm "hw:0,0"
+        format S32_LE
+        rate 48000
+        channels 2
+    }
+}

pi/bin/video-publisher.sh

@@ -112,20 +112,19 @@ run_pipeline() {
 		| "${FFMPEG_BIN_PATH}" \
 			-hide_banner \
 			-loglevel warning \
-			-fflags nobuffer \
+			-fflags nobuffer+genpts \
 			-flags low_delay \
 			-max_interleave_delta 0 \
-			-fflags +genpts \
 			-use_wallclock_as_timestamps 1 \
 			-rtbufsize 0 \
 			-thread_queue_size 512 \
 			-f h264 \
 			-i pipe:0 \
 			-thread_queue_size 2048 \
-			-f s32le \
+			-f alsa \
 			-ar "${AUDIO_RATE}" \
 			-ac "${AUDIO_CHANNELS}" \
-			-i <(arecord -D "${AUDIO_DEVICE}" -f "${AUDIO_FORMAT}" -c "${AUDIO_CHANNELS}" -r "${AUDIO_RATE}" -q -t raw) \
+			-i "${AUDIO_DEVICE}" \
 			-map 0:v:0 -map 1:a:0 \
 			-c:v copy \
 			-c:a "${AUDIO_CODEC}" \

pi/install_roverd.sh

@@ -236,6 +236,9 @@ else
 	chown roverd:audio "$FIFO_PATH"
 	chmod 0660 "$FIFO_PATH"
 fi
+# Ensure ALSA config is in place for rovermic device
+install -m 0644 pi/asound.conf /etc/asound.conf
+log "Installed ALSA config (/etc/asound.conf)"
 
 install_audio_support