Support a time range in the transcribe video scripts

dotfiles/bin/transcribe-video-medium

@@ -1,2 +1,37 @@
 #!/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
+
+if [[ $2 == "" ]]; then
+    printf "${BOLD}${RED}Usage: transcribe-video-medium <input.mp4> <output name without extension> <optional: start time HH:MM:SS, use 0 for start> <optional: end time HH:MM:SS, use empty string or 0 for no value>${NORMAL}\n"
+    exit 1
+fi
+
+start_time="$3"
+end_time="$4"
+
+if [[ $start_time == "" ]]; then start_time="0"; fi
+if [[ $end_time   == "" ]]; then end_time="0"; fi
+
 transcribe-video "$1" "$2" "medium"