diff --git a/aliases b/aliases
index fc9109c..7bdfb33 100644
--- a/aliases
+++ b/aliases
@@ -510,6 +510,10 @@ dl_twitch_chat() {
 # using the full path to the cookies file, e.g.
 #   `tw-1080p60 <url> --cookies /c/<cookie_path>/twitch_cookies.txt`
 #
+# To extract a portion of a video, you have to first download the entire file and then
+# pass these args to ffmpeg: `-ss HH:MM:SS : start time to take`, `-to HH:MM:SS : end time`.
+# Or use the script `compress-video-portion`
+#
 dl_twitch_vid() {
     local format="$1"
     local shortname="$2"
diff --git a/bin/compress-video b/bin/compress-video
index dcf021e..d51db04 100644
--- a/bin/compress-video
+++ b/bin/compress-video
@@ -23,21 +23,20 @@ else
     NORMAL=""
 fi
 
-if [[ $1 == "" || $2 == "" ]]; then
-    printf "${BOLD}${RED}Usage: $0 <use-gpu (1|0)> <filename> <optional output name>${NORMAL}\n"
+use_gpu=$1
+filename=$(basename -- "$2")
+output_name="$3"
+
+if [[ $use_gpu == "" || $2 == "" || $output_name == "" ]]; then
+    printf "${BOLD}${RED}Usage: $0 <use-gpu (1|0)> <filename> <output name>${NORMAL}\n"
     exit 1
 fi
 
-use_gpu=$1
-
 # Found the following to work best with vids containing text (e.g. programming vid): 25 for CPU encoding and 27 for GPU.
 use_crf=25
 if [[ $use_gpu -eq 1 ]]; then
     use_crf=27
 fi
 
-filename=$(basename -- "$2")
-output_name="$3"
-
 compress-video-with-crf $use_gpu $use_crf "$filename" "$output_name"
 
diff --git a/bin/compress-video-portion b/bin/compress-video-portion
new file mode 100644
index 0000000..8105a65
--- /dev/null
+++ b/bin/compress-video-portion
@@ -0,0 +1,44 @@
+#!/usr/bin/env bash
+
+if which tput >/dev/null 2>&1; then
+    ncolors=$(tput colors)
+fi
+if [ -t 1 ] && [ -n "$ncolors" ] && [ "$ncolors" -ge 8 ]; then
+    RED="$(tput setaf 1)"
+    GREEN="$(tput setaf 2)"
+    YELLOW="$(tput setaf 3)"
+    BLUE="$(tput setaf 4)"
+    MAGENTA="$(tput setaf 5)"
+    CYAN="$(tput setaf 6)"
+    BOLD="$(tput bold)"
+    NORMAL="$(tput sgr0)"
+else
+    RED=""
+    GREEN=""
+    YELLOW=""
+    BLUE=""
+    MAGENTA=""
+    CYAN=""
+    BOLD=""
+    NORMAL=""
+fi
+
+use_gpu=$1
+filename=$(basename -- "$2")
+output_name="$3"
+start_time="$4"
+end_time="$5"
+
+if [[ $use_gpu == "" || $2 == "" || $output_name == "" || $start_time == "" || $end_time == "" ]]; then
+    printf "${BOLD}${RED}Usage: $0 <use-gpu (1|0)> <filename> <output name> <start time HH:MM:SS> <end time HH:MM:SS>${NORMAL}\n"
+    exit 1
+fi
+
+# Found the following to work best with vids containing text (e.g. programming vid): 25 for CPU encoding and 27 for GPU.
+use_crf=25
+if [[ $use_gpu -eq 1 ]]; then
+    use_crf=27
+fi
+
+compress-video-with-crf $use_gpu $use_crf "$filename" "$output_name" "$start_time" "$end_time"
+
diff --git a/bin/compress-video-with-crf b/bin/compress-video-with-crf
index 603866e..3c16911 100644
--- a/bin/compress-video-with-crf
+++ b/bin/compress-video-with-crf
@@ -23,42 +23,45 @@ else
     NORMAL=""
 fi
 
-if [[ $1 == "" || $2 == "" ]]; then
-    printf "${BOLD}${RED}Usage: $0 <use-gpu (1|0)> <crf value> <filename> <optional output name>\n\nIf you want to encode a range of CRF values then use -1 as the crf value.${NORMAL}\n"
+use_gpu=$1
+use_crf=$2
+output_name="$4"
+start_time="$5"
+end_time="$6"
+
+if [[ $use_gpu == "" || $use_crf == "" || $3 == "" || $output_name == "" || ($start_time != "" && $end_time == "") ]]; then
+    printf "${BOLD}${RED}Usage: $0 <use-gpu (1|0)> <crf value> <filename> <output name> <optional start time HH:MM:SS> <optional end time HH:MM:SS>\n\nIf you want to encode a range of CRF values then use -1 as the crf value.${NORMAL}\n"
     exit 1
 fi
 
-use_gpu=$1
-use_crf=$2
 
 filename=$(basename -- "$3")
 extension="${filename##*.}"
 filename="${filename%.*}"
 
-output_name="$4"
-
 function encode() {
     crf=$1
-    if [[ $output_name == "" ]]; then
-        output="${filename}_COMPRESSED_CRF-${crf}.$extension"
-    else
-        output="${output_name}.$extension"
-    fi
+    output="${output_name}.$extension"
 
-    printf "\n${YELLOW}${BOLD}Encoding '$filename.$extension' | GPU: $use_gpu | CRF $crf | output: $output${NORMAL}\n"
+    printf "\n${YELLOW}${BOLD}Encoding '$filename.$extension' | GPU: $use_gpu | CRF $crf | output: $output | start: $start_time | end: $end_time${NORMAL}\n"
+
+    timing_args=""
+    if [[ $start_time != "" ]]; then
+        timing_args+="-ss $start_time -to $end_time"
+    fi
 
     if [[ $use_gpu -eq 1 ]]; then
         # File will be slightly larger than CPU encoding, but it's much faster to transcode and doesn't max out the CPU cores.
 
         #ffmpeg version N-103152-gef54590f83-20210806
         # This version of ffmpeg results in larger files than version 4.3.1 command below.
-        #ffmpeg -y -stats -loglevel level+error -vsync 0 -hwaccel_output_format cuda -c:v h264_cuvid -i "$filename.$extension" -c:a copy -c:v h264_nvenc -profile:v high -rc:v vbr -cq:v $crf -b:v 5M -maxrate 5M -max_muxing_queue_size 9999 "$output"
+        #ffmpeg -y -stats -loglevel level+error $timing_args -vsync 0 -hwaccel_output_format cuda -c:v h264_cuvid -i "$filename.$extension" -c:a copy -c:v h264_nvenc -profile:v high -rc:v vbr -cq:v $crf -b:v 5M -maxrate 5M -max_muxing_queue_size 9999 "$output"
 
         #ffmpeg version 4.3.1-2020-11-08
-        ffmpeg -y -stats -loglevel level+error -vsync 0 -hwaccel cuvid -c:v h264_cuvid -i "$filename.$extension" -c:a copy -c:v h264_nvenc -profile:v high -rc:v vbr_hq -cq:v $crf -b:v 5M -maxrate 5M -max_muxing_queue_size 9999 "$output"
+        ffmpeg -y -stats -loglevel level+error $timing_args -vsync 0 -hwaccel cuvid -c:v h264_cuvid -i "$filename.$extension" -c:a copy -c:v h264_nvenc -profile:v high -rc:v vbr_hq -cq:v $crf -b:v 5M -maxrate 5M -max_muxing_queue_size 9999 "$output"
 
     else
-        ffmpeg -i "$filename.$extension" -c:v libx264 -crf $crf -preset veryfast -profile:v baseline -level 3.0 -strict -2 "$output"
+        ffmpeg $timing_args -i "$filename.$extension" -c:v libx264 -crf $crf -preset veryfast -profile:v baseline -level 3.0 -strict -2 "$output"
     fi
     printf "\n${GREEN}${BOLD}Done encoding '$filename.$extension' (CRF $crf) | output name '$output'${NORMAL}\n\n"
 }