diff --git a/README.md b/README.md
index 4abe1c9..ba12cb5 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ With the scripts, you can:
 
 1. Install required dependencies using `./scripts/install_deps.sh`
 2. Build and install ffmpeg from source using `./scripts/build.sh`
-3. Install an encoding script using `./scripts/recc_encode_install.sh -I`
+3. Install an encoding script using `./scripts/recc_encode.sh -I`
 4. Install a film-grain estimation script using `./scripts/estimate_fg.sh -I`
 5. Benchmark the different encoders using `./scripts/benchmark.sh`
 
diff --git a/scripts/build.sh b/scripts/build.sh
index 3793288..3544da4 100755
--- a/scripts/build.sh
+++ b/scripts/build.sh
@@ -1,5 +1,8 @@
 #!/usr/bin/env bash
 
+# Enable extended pattern matching for ?() and +() operators
+shopt -s extglob
+
 usage() {
      echo "./scripts/build.sh [options]"
      echo -e "\th:\tdisplay this help output"
@@ -204,7 +207,7 @@ then
 fi
 
 # compilation job count
-if commmand -v nproc 2> /dev/null ; then
+if command -v nproc 2> /dev/null ; then
      THREADS="$(nproc)"
 fi
 
diff --git a/scripts/recc_encode.sh b/scripts/recc_encode.sh
index 63cd3b7..4de6231 100755
--- a/scripts/recc_encode.sh
+++ b/scripts/recc_encode.sh
@@ -1,5 +1,8 @@
 #!/usr/bin/env bash
 
+# Enable extended pattern matching for ?() and +() operators
+shopt -s extglob
+
 # this is simply my recommended encoding method.
 # do not take this as a holy grail.
 
@@ -16,6 +19,7 @@ usage() {
     echo -e "\t[-v] Print relevant version info"
     echo -e "\t[-g NUM] set film grain for encode"
     echo -e "\t[-P NUM] override default preset (3)"
+    echo -e "\t[-C NUM] override default CRF (25)"
     echo -e "\n\t[output_file] if not set, will create at $HOME/"
     echo -e "\n\t[-I] Install this as /usr/local/bin/encode"
     echo -e "\t[-U] Uninstall this from /usr/local/bin/encode"
@@ -23,7 +27,7 @@ usage() {
 }
 
 get_duration() {
-    ffmpeg -i "$1" 2>&1 | grep "Duration" | awk '{print $2}' | tr -d ,
+    /usr/local/bin/ffmpeg -i "$1" 2>&1 | grep "Duration" | awk '{print $2}' | tr -d ,
 }
 
 get_crop() {
@@ -31,7 +35,7 @@ get_crop() {
     local TOTAL_SECONDS="$(echo "$DURATION" | awk -F: '{ print ($1 * 3600) + ($2 * 60) + $3 }')"
     # get cropdetect value for first 1/5 of input
     local TIME_ENC="$(echo "$TOTAL_SECONDS / 2" | bc)"
-    ffmpeg -hide_banner -ss 0 -discard 'nokey' -i "$INPUT" -t "$TIME_ENC" \
+    /usr/local/bin/ffmpeg -hide_banner -ss 0 -discard 'nokey' -i "$INPUT" -t "$TIME_ENC" \
         -map '0:v:0' -filter:v:0 'cropdetect=limit=100:round=16:skip=2:reset_count=0' \
         -codec:v 'wrapped_avframe' -f 'null' '/dev/null' -y 2>&1 | grep -o crop=.* \
         | sort -bh | uniq -c | sort -bh | tail -n1 | grep -o "crop=.*"
@@ -76,7 +80,7 @@ convert_subs() {
 }
 
 ffmpeg_version() {
-    ffmpeg -version 2>&1 | head -n 1 | grep version | cut -d' ' -f1-3
+    /usr/local/bin/ffmpeg -version 2>&1 | head -n 1 | grep version | cut -d' ' -f1-3
 }
 
 video_enc_version() {
@@ -86,9 +90,9 @@ video_enc_version() {
 audio_enc_version() {
     local AUDIO_ENC_VERSION
     if command -v ldd > /dev/null ; then
-        AUDIO_ENC_VERSION="$(ldd "$(which ffmpeg)" | grep -i libopus | cut -d' ' -f3 | xargs readlink)"
+        AUDIO_ENC_VERSION="$(ldd "/usr/local/bin/ffmpeg" | grep -i libopus | cut -d' ' -f3 | xargs readlink)"
     elif command -v otool > /dev/null ; then
-        AUDIO_ENC_VERSION="$(otool -L $(which ffmpeg) | grep libopus | tr -d ')' | awk -F' ' '{print $NF}')"
+        AUDIO_ENC_VERSION="$(otool -L /usr/local/bin/ffmpeg | grep libopus | tr -d ')' | awk -F' ' '{print $NF}')"
     fi
     local AUDIO_ENC_GIT="$(cd "$BUILDER_DIR/repos/opus" && git rev-parse --short HEAD)"
     test "$AUDIO_ENC_GIT" != '' && AUDIO_ENC_VERSION+="-g${AUDIO_ENC_GIT}"
@@ -124,7 +128,7 @@ encode() {
         echo "export VIDEO_CROP=\"$VIDEO_CROP\"" >> "$ENCODE_FILE"
     fi
 
-    VIDEO_PARAMS="-pix_fmt yuv420p10le -crf 25 -preset $PRESET -g 240"
+    VIDEO_PARAMS="-pix_fmt yuv420p10le -crf $CRF -preset $PRESET -g 240"
     echo "export VIDEO_PARAMS=\"$VIDEO_PARAMS\"" >> "$ENCODE_FILE"
 
     CONVERT_SUBS="$(convert_subs)"
@@ -148,7 +152,7 @@ encode() {
     NL=' \\\n\t'
     echo >> "$ENCODE_FILE"
 
-    echo -e ffmpeg -i \""$INPUT"\" $NL \
+    echo -e /usr/local/bin/ffmpeg -i \""$INPUT"\" $NL \
         -map 0 \$UNMAP \$VIDEO_CROP \
         \$AUDIO_FORMAT \$AUDIO_BITRATE $NL \
         -metadata \"\$FFMPEG_VERSION\" \
@@ -157,7 +161,7 @@ encode() {
         -metadata \"\$ADD_METADATA\" $NL \
         \$FFMPEG_PARAMS -dolbyvision 1 -svtav1-params \
         $NL \"\$SVT_PARAMS\" \"\$OUTPUT\" "||" $NL \
-        ffmpeg -i \""$INPUT"\" $NL \
+        /usr/local/bin/ffmpeg -i \""$INPUT"\" $NL \
         -map 0 \$UNMAP \$VIDEO_CROP \
         \$AUDIO_FORMAT \$AUDIO_BITRATE $NL \
         -metadata \"\$FFMPEG_VERSION\" \
@@ -181,7 +185,7 @@ encode() {
     fi
 }
 
-OPTS='vi:pcsg:P:IU'
+OPTS='vi:pcsg:P:C:IU'
 NUM_OPTS="${#OPTS}"
 # default values
 CROP='false'
@@ -189,6 +193,7 @@ PRINT_OUT="false"
 SAME_CONTAINER="false"
 GRAIN=""
 PRESET=3
+CRF=25
 # only using -I/U
 MIN_OPT=1
 # using all + output name
@@ -261,6 +266,15 @@ while getopts "$OPTS" flag; do
             PRESET="${OPTARG}"
             OPTS_USED=$((OPTS_USED + 2))
             ;;
+        C)
+            if [[ ${OPTARG} != ?(-)+([[:digit:]]) || ${OPTARG} -lt 0 || ${OPTARG} -gt 63 ]]; then
+                echo "${OPTARG} is not a valid CRF value (0-63)"
+                usage
+                exit 1
+            fi
+            CRF="${OPTARG}"
+            OPTS_USED=$((OPTS_USED + 2))
+            ;;
         *)
             echo "wrong flags given"
             usage
@@ -298,6 +312,6 @@ else
 fi
 
 echo
-echo "INPUT: $INPUT, PRINT_OUT: $PRINT_OUT, GRAIN: $GRAIN, OUTPUT: $OUTPUT"
+echo "INPUT: $INPUT, PRINT_OUT: $PRINT_OUT, GRAIN: $GRAIN, PRESET: $PRESET, CRF: $CRF, OUTPUT: $OUTPUT"
 echo
 encode