diff --git a/scripts/estimate_fg.sh b/scripts/estimate_fg.sh
old mode 100644
new mode 100755
index aea1909..5dbe457
--- a/scripts/estimate_fg.sh
+++ b/scripts/estimate_fg.sh
@@ -1,45 +1,73 @@
 #!/bin/bash
 
+# global variables
+INPUT="bebop.mkv"
+SEGMENTS=10
+SEGMENT_TIME=3
+DURATION="$(get_duration "$INPUT")"
+TOTAL_SECONDS="$(echo "$DURATION" | awk -F: '{ print ($1 * 3600) + ($2 * 60) + $3 }')"
+SEGMENT_DIR='/tmp/fg_segments'
+SEGMENTS_LIST="$SEGMENT_DIR/segments_list.txt"
+OUTPUT_CONCAT="$SEGMENT_DIR/concatenated.mkv"
+TEST_MIN_GRAIN=0
+TEST_MAX_GRAIN=30
+GRAIN_STEP=5
+GRAIN_LOG="grain_log.txt"
+
 get_duration() {
     ffmpeg -i "$1" 2>&1 | grep "Duration" | awk '{print $2}' | tr -d ,
 }
 
-INPUT="bebop.mkv"
+segment_video() {
+    # set number of segments and start times
+    SEGMENT_PERCENTAGE=$((100 / SEGMENTS))
+    SEGMENT=$SEGMENT_PERCENTAGE
+    START_TIMES=()
+    while [[ $SEGMENT -lt 100 ]]
+    do
+        START_TIME="$(echo "$SEGMENT * $TOTAL_SECONDS / 100" | bc)"
+        START_TIMES+=("$START_TIME")
+        SEGMENT=$((SEGMENT + SEGMENT_PERCENTAGE))
+    done    
+        
+    # split up video into segments based on start times
+    rm -rf "$SEGMENT_DIR"
+    mkdir -p "$SEGMENT_DIR"
+    for INDEX in "${!START_TIMES[@]}"
+    do
+        # don't concatenate the last segment
+        if [[ $((INDEX + 1)) == "${#START_TIMES[@]}" ]]; then
+            break
+        fi
+        START_TIME="${START_TIMES[$INDEX]}"
+        OUTPUT_SEGMENT="$SEGMENT_DIR/segment_$INDEX.mkv"
+        echo "START_TIME: $START_TIME"
+        ffmpeg -ss "$START_TIME" -i "$INPUT" \
+            -hide_banner -loglevel error -t "$SEGMENT_TIME" \
+            -map 0:0 -reset_timestamps 1 -c copy "$OUTPUT_SEGMENT"
+        echo "file '$(basename "$OUTPUT_SEGMENT")'" >> "$SEGMENTS_LIST"
+    done
+    
+    # ffmpeg -f concat -safe 0 -i "$SEGMENTS_LIST" -hide_banner -loglevel error -c copy "$OUTPUT_CONCAT"
+}
 
-DURATION="$(get_duration "$INPUT")"
-TOTAL_SECONDS="$(echo "$DURATION" | awk -F: '{ print ($1 * 3600) + ($2 * 60) + $3 }')"
-echo "TOTAL_SECONDS: $TOTAL_SECONDS"
+encode_segments() {
+    cd "$SEGMENT_DIR" || exit
+    clear
+    echo > "$GRAIN_LOG"
+    for VIDEO in $(ls segment*.mkv)
+    do
+        echo "$VIDEO" >> "$GRAIN_LOG"
+        for GRAIN in $(seq $TEST_MIN_GRAIN $GRAIN_STEP $TEST_MAX_GRAIN)
+        do
+            OUTPUT_VIDEO="encoded_$VIDEO"
+            encode -i "$VIDEO" -g $GRAIN "$OUTPUT_VIDEO"
+            BITRATE="$(mediainfo "$OUTPUT_VIDEO" | tr -s ' ' | grep 'Bit rate : ' | cut -d':' -f2)"
+            echo -e "\tgrain: $GRAIN, bitrate:$BITRATE" >> "$GRAIN_LOG"
+        done
+        echo >> "$GRAIN_LOG"
+    done
 
-# set number of segments and start times
-SEGMENTS=9
-SEGMENT_PERCENTAGE=$((100 / SEGMENTS))
-SEGMENT=$SEGMENT_PERCENTAGE
-START_TIMES=()
-while [[ $SEGMENT -lt 100 ]]
-do
-    START_TIME="$(echo "$SEGMENT * $TOTAL_SECONDS / 100" | bc)"
-    START_TIMES+=("$START_TIME")
-    SEGMENT=$((SEGMENT + SEGMENT_PERCENTAGE))
-done
-
-# split up video into segments based on start times
-SEGMENT_TIME=1
-SEGMENT_DIR='./tmp/fg_segments'
-SEGMENTS_LIST="$SEGMENT_DIR/segments_list.txt"
-OUTPUT_CONCAT="$SEGMENT_DIR/concatenated.mkv"
-rm -rf "$SEGMENT_DIR"
-mkdir -p "$SEGMENT_DIR"
-for INDEX in "${!START_TIMES[@]}"
-do
-    # don't concatenate the last segment
-    if [[ $((INDEX + 1)) == "${#START_TIMES[@]}" ]]; then
-        break
-    fi
-    START_TIME="${START_TIMES[$INDEX]}"
-    OUTPUT_SEGMENT="$SEGMENT_DIR/segment_$INDEX.mkv"
-    echo "START_TIME: $START_TIME"
-    ffmpeg -ss "$START_TIME" -i "$INPUT" -hide_banner -loglevel error -t "$SEGMENT_TIME" -map 0:0 -c copy "$OUTPUT_SEGMENT"
-    echo "file '$(basename "$OUTPUT_SEGMENT")'" >> "$SEGMENTS_LIST"
-done
-
-ffmpeg -f concat -safe 0 -i "$SEGMENTS_LIST" -hide_banner -loglevel error -c copy "$OUTPUT_CONCAT"
+    clear
+    cat "$GRAIN_LOG"
+}
diff --git a/scripts/recc_encode.sh b/scripts/recc_encode.sh
index dad707d..5fb61f6 100755
--- a/scripts/recc_encode.sh
+++ b/scripts/recc_encode.sh
@@ -17,18 +17,27 @@ encode() {
     UNMAP=$(unmap_streams "$INPUT")
     AUDIO_FORMAT='-af "aformat=channel_layouts=7.1|5.1|stereo|mono" -c:a libopus'
     AUDIO_BITRATE=$(get_bitrate_audio "$INPUT")
-    FFMPEG_PARAMS='-y -c:s copy -c:V libsvtav1 -pix_fmt yuv420p10le -crf 25 -preset 3 -g 240'
+    VIDEO_ENCODER="libsvtav1"
+    VIDEO_PARAMS="-pix_fmt yuv420p10le -crf 25 -preset 3 -g 240"
+    FFMPEG_PARAMS="-y -c:s copy -c:V $VIDEO_ENCODER $VIDEO_PARAMS"
     NL=' \\\n\t'
 
+    FFMPEG_VERSION="$(ffmpeg -version 2>&1 | grep version | cut -d' ' -f1-3)"
+    VIDEO_ENC_VERSION="$(ldd $(which ffmpeg) | grep -i "$VIDEO_ENCODER" | cut -d' ' -f3 | xargs readlink)"
+    AUDIO_ENC_VERSION="$(ldd $(which ffmpeg) | grep -i libopus | cut -d' ' -f3 | xargs readlink)"
+    ADD_METADATA="-metadata encoding_params=\"$FFMPEG_VERSION $AUDIO_ENC_VERSION $VIDEO_ENC_VERSION $VIDEO_PARAMS $SVT_PARAMS\""
+
     echo '#!/bin/bash' > "$ENCODE_FILE"
     echo -e ffmpeg -i \""$INPUT"\" -map 0 $UNMAP \
         $AUDIO_FORMAT $NL $AUDIO_BITRATE \
+        $ADD_METADATA $NL \
         "$FFMPEG_PARAMS" -dolbyvision 1 -svtav1-params \
         $NL "\"$SVT_PARAMS\" \"$OUTPUT\" ||" $NL \
         ffmpeg -i \""$INPUT"\" -map 0 $UNMAP \
         $AUDIO_FORMAT $NL $AUDIO_BITRATE \
+        $ADD_METADATA $NL \
         "$FFMPEG_PARAMS" -svtav1-params \
-        $NL "\"$SVT_PARAMS\" \"$OUTPUT\"" >> "$ENCODE_FILE"        
+        $NL "\"$SVT_PARAMS\" \"$OUTPUT\" || exit 1" >> "$ENCODE_FILE"        
     
     if [[ "$EXT" == "mkv" ]]; then
         echo "mkvpropedit \"$OUTPUT\" --add-track-statistics-tags" >> "$ENCODE_FILE"