Add plex option to control downmix audio boost. Also fix request for audio channel limitation, was missing a & in the request

index.js

@@ -129,6 +129,7 @@ function initDB(db) {
             videoCodecs: 'h264,hevc,mpeg2video',
             audioCodecs: 'ac3,aac,mp3',
             maxAudioChannels: '6',
+            audioBoost: '100',
             enableSubtitles: false,
             subtitleSize: '100',
             updatePlayStatus: false,

src/api.js

@@ -98,6 +98,7 @@ function api(db, xmltvInterval) {
             videoCodecs: 'h264,hevc,mpeg2video',
             audioCodecs: 'ac3,aac,mp3',
             maxAudioChannels: '6',
+            audioBoost: '100',
             enableSubtitles: false,
             subtitleSize: '100',
             updatePlayStatus: false,

src/plexTranscoder.js

@@ -54,7 +54,6 @@ class PlexTranscoder {
         let streamContainer = "mpegts" // Other option is mkv, mkv has the option of copying it's subs for later processing
         
         let videoQuality=`100` // Not sure how this applies, maybe this works if maxVideoBitrate is not set
-        let audioBoost=`100` // only applies when downmixing to stereo I believe, add option later?
         let profileName=`Generic` // Blank profile, everything is specified through X-Plex-Client-Profile-Extra
         
         let resolutionArr = resolution.split("x")
@@ -69,9 +68,9 @@ add-limitation(scope=videoCodec&scopeName=*&type=upperBound&name=video.height&va
         this.settings.audioCodecs.split(",").forEach(function (codec) {
             clientProfile+=`+add-transcode-target-audio-codec(type=videoProfile&context=streaming&protocol=${this.settings.streamProtocol}&audioCodec=${codec})`
             if (codec == "mp3") {
-                clientProfile+=`+add-limitation(scope=videoAudioCodec&scopeName=${codec}type=upperBound&name=audio.channels&value=2)`
+                clientProfile+=`+add-limitation(scope=videoAudioCodec&scopeName=${codec}&type=upperBound&name=audio.channels&value=2)`
             } else {
-                clientProfile+=`+add-limitation(scope=videoAudioCodec&scopeName=${codec}type=upperBound&name=audio.channels&value=${this.settings.maxAudioChannels})`
+                clientProfile+=`+add-limitation(scope=videoAudioCodec&scopeName=${codec}&type=upperBound&name=audio.channels&value=${this.settings.maxAudioChannels})`
             }
           }.bind(this));
 
@@ -98,7 +97,7 @@ directPlay=0&\
 directStream=1&\
 directStreamAudio=1&\
 copyts=1&\
-audioBoost=${audioBoost}&\
+audioBoost=${this.settings.audioBoost}&\
 mediaBufferSize=${mediaBufferSize}&\
 session=${this.session}&\
 offset=${this.currTimeS}&\

web/directives/plex-settings.js

@@ -76,6 +76,13 @@ module.exports = function (plex, pseudotv, $timeout) {
                 {id:"http",description:"HTTP"},
                 {id:"hls",description:"HLS"}
             ];
+            scope.audioBoostOptions=[
+                {id:"100",description:"None"},
+                {id:"120",description:"Small"},
+                {id:"140",description:"Medium"},
+                {id:"160",description:"Large"},
+                {id:"180",description:"Huge"}
+            ];
         }
     };
 }

web/public/templates/plex-settings.html

@@ -84,6 +84,12 @@
                 ng-options="o.id as o.description for o in maxAudioChannelsOptions" ria-describedby="maxAudioChannelsHelp"/>
             <small id="maxAudioChannelsHelp" class="form-text text-muted">Note: 7.1 audio and on some clients, 6.1, is known to cause playback issues.</small>
         </div>
+        <div class="form-group">
+            <label>Audio Boost</label>
+            <select ng-model="settings.audioBoost" 
+                ng-options="o.id as o.description for o in audioBoostOptions" ria-describedby="audioBoostHelp"/>
+            <small id="audioBoostHelp" class="form-text text-muted">Note: Only applies when downmixing to stereo.</small>
+        </div>
     </div>
 </div>
 <div class="row">