Make bitrate optional

Community/Tdarr_Plugin_a9hd_FFMPEG_Transcode_Specific_Audio_Stream_Codecs.js

@@ -38,7 +38,7 @@ module.exports.details = function details() {
       },
       {
         name: "bitrate",
-        tooltip: `Specify the transcoded audio bitrate:
+        tooltip: `Specify the transcoded audio bitrate (optional):
         \\n 384k
         \\n 640k
         \\nExample:\\n
@@ -63,7 +63,7 @@ module.exports.plugin = function plugin(file, librarySettings, inputs) {
     infoLog: "",
   };
 
-  if (inputs.codecs_to_transcode === undefined || inputs.codec === undefined || inputs.bitrate === undefined) {
+  if (inputs.codecs_to_transcode === undefined || inputs.codec === undefined ) {
     response.processFile = false;
     response.infoLog += "☒ Inputs not entered! \n";
     return response;
@@ -90,7 +90,10 @@ module.exports.plugin = function plugin(file, librarySettings, inputs) {
         file.ffProbeData.streams[i].codec_name.toLowerCase()
       )
     ) {
-      ffmpegCommand += `  -map 0:${i} -c:${i} ${encoder} -b:a ${inputs.bitrate} `;
+      ffmpegCommand += `  -map 0:${i} -c:${i} ${encoder} `;
+      if (inputs.bitrate != undefined) {
+        ffmpegCommand += `-b:a ${inputs.bitrate} `;
+      }
       hasStreamsToTranscode = true;
     } else if (file.ffProbeData.streams[i].codec_type.toLowerCase() == "audio") {
       ffmpegCommand += `  -map 0:${i}`;