clarify last change

stream.py

@@ -81,6 +81,7 @@ def convert(filepath):
             ffmpeg_cmd.extend(["-c:v", "libx264", "-b:v", "1M"])
         
         # Add audio options based on codec and available encoders
+	# We dont need to transcode Audio if its already in opus or vorbis format.
         if audio_codec_info in ["opus", "vorbis"]:
             ffmpeg_cmd.extend(["-c:a", "copy"])
         elif "libvorbis" in available_encoders: