diff --git a/frigate/test/http_api/test_http_camera_access.py b/frigate/test/http_api/test_http_camera_access.py
index ba3f79d3e9..9d1b57b1cc 100644
--- a/frigate/test/http_api/test_http_camera_access.py
+++ b/frigate/test/http_api/test_http_camera_access.py
@@ -418,6 +418,9 @@ class TestGo2rtcStreamAccess(BaseTestHttp):
                     "ffmpeg:front_door#video=out.mp4",
                     "ffmpeg:front_door#drawtext=x",
                     "ffmpeg:front_door#width=1x",
+                    "ffmpeg:front_door#audio=/16000",
+                    "ffmpeg:front_door#audio=opus/",
+                    "ffmpeg:front_door#audio=opus/16000/1",
                     "ffmpeg:'front_door'",
                     "  ffmpeg:#input=-re",
                 ):
@@ -444,6 +447,8 @@ class TestGo2rtcStreamAccess(BaseTestHttp):
                     "ffmpeg:front_door#audio=opus",
                     "ffmpeg:front_door#video=h264#hardware=vaapi",
                     "ffmpeg:front_door#video=h264#width=1280#rotate=-90",
+                    # documented HomeKit source
+                    "ffmpeg:front_door#video=h264#width=1280#height=720#audio=opus/16000",
                     "ffmpeg:http://10.0.0.1/flv?port=1935&app=bcs#video=copy",
                 ):
                     resp = client.put("/go2rtc/streams/legit", params={"src": src})
diff --git a/frigate/util/services.py b/frigate/util/services.py
index c460a71f99..d46c6257d9 100644
--- a/frigate/util/services.py
+++ b/frigate/util/services.py
@@ -994,7 +994,8 @@ _GO2RTC_FFMPEG_NUMERIC_PARAMS = frozenset(
     {"width", "height", "rotate", "bitrate", "timeout"}
 )
 _GO2RTC_FFMPEG_FLAG_PARAMS = frozenset({"async"})
-_GO2RTC_FFMPEG_NAME_VALUE = re.compile(r"^[A-Za-z0-9_]*$")
+# a preset or codec name, optionally with a sample rate (e.g. opus/16000)
+_GO2RTC_FFMPEG_NAME_VALUE = re.compile(r"^([A-Za-z0-9_]*|[A-Za-z0-9_]+/[0-9]{1,6})$")
 _GO2RTC_FFMPEG_NUMERIC_VALUE = re.compile(r"^-?[0-9]+[kKmM]?$")