Add setting to prioritise what audio codec to transcode to

src/components/apphost.js

@@ -70,6 +70,21 @@ function getDeviceProfile(item) {
             });
         }
 
+        const preferredTranscodeVideoAudioCodec = appSettings.preferredTranscodeVideoAudioCodec();
+        if (preferredTranscodeVideoAudioCodec) {
+            profile.TranscodingProfiles.forEach((transcodingProfile) => {
+                if (transcodingProfile.Type === 'Video') {
+                    const audioCodecs = transcodingProfile.AudioCodec.split(',');
+                    const index = audioCodecs.indexOf(preferredTranscodeVideoAudioCodec);
+                    if (index !== -1) {
+                        audioCodecs.splice(index, 1);
+                        audioCodecs.unshift(preferredTranscodeVideoAudioCodec);
+                        transcodingProfile.AudioCodec = audioCodecs.join(',');
+                    }
+                }
+            });
+        }
+
         resolve(profile);
     });
 }

src/components/playbackSettings/playbackSettings.js

@@ -182,6 +182,7 @@ function loadForm(context, user, userSettings, systemInfo, apiClient) {
     context.querySelector('.chkRememberSubtitleSelections').checked = user.Configuration.RememberSubtitleSelections || false;
     context.querySelector('.chkExternalVideoPlayer').checked = appSettings.enableSystemExternalPlayers();
     context.querySelector('.chkLimitSupportedVideoResolution').checked = appSettings.limitSupportedVideoResolution();
+    context.querySelector('#selectPreferredTranscodeVideoAudioCodec').value = appSettings.preferredTranscodeVideoAudioCodec();
 
     setMaxBitrateIntoField(context.querySelector('.selectVideoInNetworkQuality'), true, 'Video');
     setMaxBitrateIntoField(context.querySelector('.selectVideoInternetQuality'), false, 'Video');
@@ -217,6 +218,7 @@ function saveUser(context, user, userSettingsInstance, apiClient) {
     appSettings.maxChromecastBitrate(context.querySelector('.selectChromecastVideoQuality').value);
     appSettings.maxVideoWidth(context.querySelector('.selectMaxVideoWidth').value);
     appSettings.limitSupportedVideoResolution(context.querySelector('.chkLimitSupportedVideoResolution').checked);
+    appSettings.preferredTranscodeVideoAudioCodec(context.querySelector('#selectPreferredTranscodeVideoAudioCodec').value);
 
     appSettings.enableDts(context.querySelector('.chkEnableDts').checked);
     appSettings.enableTrueHd(context.querySelector('.chkEnableTrueHd').checked);

src/components/playbackSettings/playbackSettings.template.html

@@ -179,6 +179,19 @@ <h2 class="sectionTitle">
             </label>
             <div class="fieldDescription checkboxFieldDescription">${EnableTrueHdHelp}</div>
         </div>
+
+        <div class="selectContainer">
+            <select is="emby-select" id="selectPreferredTranscodeVideoAudioCodec" label="${LabelSelectPreferredTranscodeVideoAudioCodec}">
+                <option value="">${Auto}</option>
+                <option value="aac">AAC</option>
+                <option value="ac3">AC3</option>
+                <option value="alac">ALAC</option>
+                <option value="dts">DTS</option>
+                <option value="flac">FLAC</option>
+                <option value="opus">Opus</option>
+            </select>
+            <div class="fieldDescription">${SelectPreferredTranscodeVideoAudioCodecHelp}</div>
+        </div>
     </div>
 
     <button is="emby-button" type="submit" class="raised button-submit block btnSave hide">

src/scripts/settings/appSettings.js

@@ -132,6 +132,18 @@ class AppSettings {
         return toBoolean(this.get('limitSupportedVideoResolution'), false);
     }
 
+    /**
+     * Get or set preferred transcode audio codec in video playback.
+     * @param {string|undefined} val - Preferred transcode audio codec or undefined.
+     * @return {string} Preferred transcode audio codec.
+     */
+    preferredTranscodeVideoAudioCodec(val) {
+        if (val !== undefined) {
+            return this.set('preferredTranscodeVideoAudioCodec', val);
+        }
+        return this.get('preferredTranscodeVideoAudioCodec') || '';
+    }
+
     /**
      * Get or set 'Enable DTS' state.
      * @param {boolean|undefined} val - Flag to enable 'Enable DTS' or undefined.

src/strings/en-us.json

@@ -559,6 +559,7 @@
     "LabelAudioCodec": "Audio codec",
     "LabelAudioLanguagePreference": "Preferred audio language",
     "LabelSelectAudioNormalization": "Audio Normalization",
+    "LabelSelectPreferredTranscodeVideoAudioCodec": "Preferred transcode audio codec in video playback",
     "LabelAudioSampleRate": "Audio sample rate",
     "LabelAuthProvider": "Authentication Provider",
     "LabelAutomaticallyAddToCollection": "Automatically add to collection",
@@ -1379,6 +1380,7 @@
     "Season": "Season",
     "SecondarySubtitles": "Secondary Subtitles",
     "SelectAdminUsername": "Please select a username for the admin account.",
+    "SelectPreferredTranscodeVideoAudioCodecHelp": "Select the preferred audio codec to transcode to for video content. If the preferred codec is not supported, the server will use the next best available codec.",
     "SelectServer": "Select Server",
     "SendMessage": "Send message",
     "Series": "Series",