This is normal. You didn't read the full name for the audio codec, it's "ffmpeg DVD subtitles", so it's not actually an audio codec. Nonetheless, it doesn't make sense for this thing to actually be in that list, so I'll report the bug upstream.
This is normal. You didn't read the full name for the audio codec, it's "ffmpeg DVD subtitles", so it's not actually an audio codec. Nonetheless, it doesn't make sense for this thing to actually be in that list, so I'll report the bug upstream.