docs: add suggested quality rate factors

Source: <https://auphonic.com/blog/2013/01/07/loudness-targets-mobile-audio-podcasts-radio-tv/>

1 files changed, 3 insertions, 1 deletions

diff --git a/localvideowebencode b/localvideowebencode
index ed3e378..ff1b072 100755
--- a/localvideowebencode
+++ b/localvideowebencode
@@ -123,7 +123,9 @@ html favoring open formats with optional non-JavaScript Flash fallback.
                       quality  medium    vary      medium       Q,1
                     (default: normal)
   --quality         Quality rate factor: auto [integer] none
-                    (default: auto)
+                      suggested, h264:        19  23  27  31  35  39
+                      suggested, vp8/vp9:     27  33  39  45  51  57
+                    (default: auto - 23 for h264, 33 for vp8/vp9)
   --gpu             Use hardware acceleration: none auto vaapi qsv
                     (default: auto when compression=dirty, else none)
   --gpudevice       Device used for hardware acceleration