Fixes various issues

Makes it possible to turn off all types of hardware acceleration for all converters
Only encodes anime to hevc if not already hevc
Adds an option to force hevc to hevc encoding, for the anime converter
Adds an option to force encoding of audio, for the anime converter
Fixes a bug causing the codec name to not be parsed
Fixes an exception when trying to sort an empty list
Fixes order of sorting in the anime converter
Adds another signs songs filter

src/main/java/net/knarcraft/ffmpegconverter/utility/FFMpegHelper.java

@@ -160,7 +160,7 @@ public final class FFMpegHelper {
         }
         try {
             int exitCode = process.waitFor();
-            OutputUtil.println("Process finished.");
+            OutputUtil.println("Process finished with exit code: " + exitCode);
             return new ProcessResult(exitCode, output.toString());
         } catch (InterruptedException e) {
             return new ProcessResult(1, output.toString());