rebroadcast: fix various bugs related to rtsp mode and soft mute

plugins/prebuffer-mixin/package-lock.json

@@ -1,12 +1,12 @@
 {
    "name": "@scrypted/prebuffer-mixin",
-   "version": "0.1.175",
+   "version": "0.1.176",
    "lockfileVersion": 2,
    "requires": true,
    "packages": {
       "": {
          "name": "@scrypted/prebuffer-mixin",
-         "version": "0.1.175",
+         "version": "0.1.176",
          "license": "Apache-2.0",
          "dependencies": {
             "@scrypted/common": "file:../../common",

plugins/prebuffer-mixin/package.json

@@ -1,6 +1,6 @@
 {
    "name": "@scrypted/prebuffer-mixin",
-   "version": "0.1.175",
+   "version": "0.1.176",
    "description": "Rebroadcast and Prebuffer for VideoCameras.",
    "author": "Scrypted",
    "license": "Apache-2.0",

plugins/prebuffer-mixin/src/main.ts

@@ -403,7 +403,13 @@ class PrebufferSession {
       });
     }
     else {
-      const parser = createRtspParser();
+      const parser = createRtspParser({
+        vcodec,
+        // the rtsp parser should always stream copy unless audio is soft muted.
+        acodec: audioSoftMuted
+          ? ['-an']
+          : ['-acodec', 'copy'],
+      });
       this.sdp = parser.sdp;
       rbo.parsers.rtsp = parser;
     }
@@ -453,7 +459,8 @@ class PrebufferSession {
         this.sdp = Promise.resolve(sdp);
         const { audio, video } = parseTrackIds(sdp);
         // handle no audio?
-        await rtspClient.setup(0, audio);
+        if (!audioSoftMuted)
+          await rtspClient.setup(0, audio);
         await rtspClient.setup(2, video);
         const socket = await rtspClient.play();
         session = await startRFC4571Parser(this.console, socket, sdp, ffmpegInput.mediaStreamOptions, true, rbo);

plugins/prebuffer-mixin/src/rfc4571.ts

@@ -98,8 +98,9 @@ export async function startRFC4571Parser(console: Console, socket: net.Socket, s
     })()
         .finally(kill);
 
-    let inputAudioCodec = mediaStreamOptions.audio.codec;
-    let inputVideoCodec = mediaStreamOptions.video.codec;
+    let inputAudioCodec: string;
+    let inputVideoCodec: string;
+    // todo: multiple codecs may be offered, default is the first one in the sdp.
     const audio = findTrack(sdp, 'audio');
     const video = findTrack(sdp, 'video');
     if (audio) {