Add script to fix one-sided audio channel in a vid

bin/fix-audio-in-one-channel

@@ -0,0 +1,51 @@
+#!/usr/bin/env bash
+
+# Use this to fix the audio of a video that has audio in only the left or right
+# channel. This does not re-encode the video.
+
+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 [[ $1 == "" ]]; then
+    printf "\n${BOLD}Usage: $0 <filename> <optional output name>${NORMAL}\n"
+    exit 1
+fi
+
+filename=$(basename -- "$1")
+extension="${filename##*.}"
+filename="${filename%.*}"
+
+output_name="$2"
+
+if [[ $output_name == "" ]]; then
+    output="${filename}_repaired_audio.$extension"
+else
+    output="${output_name}.$extension"
+fi
+
+printf "\n${YELLOW}${BOLD}Repairing audio in $filename.$extension | output: $output${NORMAL}\n"
+
+ffmpeg -i "$filename.$extension" -c:v copy -ac 1 "$output"
+
+printf "\n${GREEN}${BOLD}Done repairing audio in $filename.$extension | output: $output${NORMAL}\n\n"
+