diff --git a/rc_shared.sh b/rc_shared.sh
index 5a3ce8e..f78e57f 100644
--- a/rc_shared.sh
+++ b/rc_shared.sh
@@ -805,11 +805,17 @@ function pv-test {
 	for vcodec in libx264 libsvtav1 libx265; do
 		#echo "3 4 5" | while read vpreset; do
 			#echo "25 28 32" | while read crf; do
-				for vbr in 1500k 2000k 2500k; do
+				for vbr in 2000k; do # 1500k 2000k 2500k
 					for acodec in aac libopus; do
 						for abr in 192k 128k; do
-							#for ext in mp4 mkv; do
-                                ext=mkv
+							for ext in mkv; do # mp4 mkv
+								bitrate=""
+								if [[ $vcodec == "libsvtav1" ]]; then
+									bitrate="-svtav1-params rc=1:tbr=$vbr:overshoot-pct=0:undershoot-pct=100"
+								else
+									bitrate="-b:v $vbr -minrate 0 -maxrate $vbr -bufsize $vbr"
+								fi
+
 								#newfile="_$vcodec-p$vpreset-$crf_$acodec-$abr.$ext"
 								newfile="_${size_in}_${vcodec}-${vbr}_${acodec}-${abr}.${ext}"
 								start=$SECONDS
@@ -823,7 +829,7 @@ function pv-test {
 									-i "$filename_in" \
 									-filter:v scale=-1:$size_in \
 									-c:v $vcodec \
-									-b:v $vbr -minrate 0 -maxrate $vbr -bufsize $vbr \
+									$bitrate \
 									-c:a $acodec \
 									-b:a $abr \
 									$normalize \
@@ -833,13 +839,13 @@ function pv-test {
 
 								finish=$SECONDS
 								minutes=$(( (finish - start) / 60 ))
-                                seconds=$(( (finish - start) % 60 ))
+                        seconds=$(( (finish - start) % 60 ))
 								printf -v padded_mins "%03d" "$minutes"
-                                printf -v padded_secs "%02d" "$seconds"
-								mv -v "$newfile" "${filename_in}_${padded_mins}m${padded_secs}s_${newfile}"
+                        printf -v padded_secs "%02d" "$seconds"
+								mv -v "$newfile" "${filename_in}_${padded_mins}m${padded_secs}s${newfile}"
 
-								echo -e "\n* Finished run in $minutes minutes!\n"
-							#done
+								echo -e "\n* Finished in ${minutes}m${seconds}s!\n"
+							done
 						done
 					done
 				done