pv-test, change scale for libsvtav1 presets, plus add comments.

2026-09-18 18:42:18 -07:00
parent 5f0144ed1d
commit 6e9288e5c2
1 changed files with 9 additions and 7 deletions
@@ -980,14 +980,16 @@ function pv-test {
 						preset=""
 						if [[ "$vpreset" != "default" ]]; then
 							if [[ "$vcodec" == "libsvtav1" ]]; then
+# Scale goes from 0 to 13, 0 being like x264's "placebo", above 8 being destructive.
+# Each step down is about 2x as slow, so 6 to 4 is ~4x slower, 6 to 2 is ~16x slower.
 								case $vpreset in
-									vsl) preset="0" ;;
-									slr) preset="2" ;;
-									slw) preset="4" ;;
-									med) preset="6" ;;
-									fst) preset="8" ;; # default
-									fsr) preset="10" ;;
-									vft) preset="12" ;;
+									vsl) preset="2" ;; # best quality; quite slow, but still feasible
+									slr) preset="3" ;; # great quality (very little gained)
+									slw) preset="4" ;; # great quality; decent speed
+									med) preset="6" ;; # good quality; great speed
+									fst) preset="8" ;; # default; quite fast
+									fsr) preset="9" ;; # rough drafts only
+									vft) preset="10" ;; # real time encoding for livestreams
 									*) preset="$vpreset" ;;
 								esac
 							else