rebroadcast: respect audio config in rtsp mode

plugins/prebuffer-mixin/package-lock.json

@@ -1,12 +1,12 @@
 {
    "name": "@scrypted/prebuffer-mixin",
-   "version": "0.1.196",
+   "version": "0.1.199",
    "lockfileVersion": 2,
    "requires": true,
    "packages": {
       "": {
          "name": "@scrypted/prebuffer-mixin",
-         "version": "0.1.196",
+         "version": "0.1.199",
          "license": "Apache-2.0",
          "dependencies": {
             "@scrypted/common": "file:../../common",

plugins/prebuffer-mixin/package.json

@@ -1,6 +1,6 @@
 {
    "name": "@scrypted/prebuffer-mixin",
-   "version": "0.1.196",
+   "version": "0.1.199",
    "description": "Rebroadcast and Prebuffer for VideoCameras.",
    "author": "Scrypted",
    "license": "Apache-2.0",

plugins/prebuffer-mixin/src/main.ts

@@ -527,7 +527,9 @@ class PrebufferSession {
       const parser = createRtspParser({
         vcodec,
         // the rtsp parser should always stream copy unless audio is soft muted.
-        acodec,
+        acodec: isUsingDefaultAudioConfig
+          ? ['-acodec', 'copy']
+          : acodec,
       });
       this.sdp = parser.sdp;
       rbo.parsers.rtsp = parser;