Adds ability to force-select specific audio and subtitle streams for the anime converter

src/main/java/net/knarcraft/ffmpegconverter/converter/AudioConverter.java

@@ -33,7 +33,7 @@ public class AudioConverter extends AbstractConverter {
         }
 
         //Gets the first audio stream from the file and adds it to the output file
-        AudioStream audioStream = getFirstAudioSteam(streams);
+        AudioStream audioStream = getNthAudioSteam(streams, 0);
         FFMpegHelper.addAudioStream(command, audioStream, false);
         command.add(outFile);
 
@@ -44,4 +44,5 @@ public class AudioConverter extends AbstractConverter {
     public String[] getValidFormats() {
         return audioFormats;
     }
+
 }