echo >&2 " - mp4vhq = MP4, very high quality encoding, x264 codec, 2 pass encoding"
echo >&2 " - mp4hq = MP4, high quality encoding, x264 codec, 2 pass encoding"
echo >&2 " - mp4 = MP4, fast encoding, x264 codec, 2 pass encoding"
echo >&2 " - mp4vhq = MP4, very high quality encoding, x264 codec, 2 pass encoding"
echo >&2 " - mp4hq = MP4, high quality encoding, x264 codec, 2 pass encoding"
echo >&2 " - mp4 = MP4, fast encoding, x264 codec, 2 pass encoding"