From 159c8cff90fbc3af56a0d5f23cae19343f8dcba0 Mon Sep 17 00:00:00 2001
From: Michael Campagnaro <mikecampo@protonmail.com>
Date: Sun, 19 May 2024 17:28:41 -0400
Subject: [PATCH] Improve ffmpeg audio fix scripts

---
 ...annel => copy-left-audio-channel-to-right} | 11 ++--
 dotfiles/bin/copy-right-audio-channel-to-left | 50 +++++++++++++++++++
 2 files changed, 55 insertions(+), 6 deletions(-)
 rename dotfiles/bin/{fix-audio-in-one-channel => copy-left-audio-channel-to-right} (61%)
 create mode 100644 dotfiles/bin/copy-right-audio-channel-to-left

diff --git a/dotfiles/bin/fix-audio-in-one-channel b/dotfiles/bin/copy-left-audio-channel-to-right
similarity index 61%
rename from dotfiles/bin/fix-audio-in-one-channel
rename to dotfiles/bin/copy-left-audio-channel-to-right
index 613afc1..bfa2128 100644
--- a/dotfiles/bin/fix-audio-in-one-channel
+++ b/dotfiles/bin/copy-left-audio-channel-to-right
@@ -1,7 +1,6 @@
 #!/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.
+# Use this to copy audio from the left channel to the right. This does not re-encode the video.
 
 if which tput >/dev/null 2>&1; then
     ncolors=$(tput colors)
@@ -27,7 +26,7 @@ else
 fi
 
 if [[ $1 == "" ]]; then
-    printf "${BOLD}${RED}Usage: fix-audio-in-one-channel <filename> <optional output name>${NORMAL}\n"
+    printf "${BOLD}${RED}Usage: copy-left-audio-channel-to-right <filename> <optional output name>${NORMAL}\n"
     exit 1
 fi
 
@@ -43,9 +42,9 @@ else
     output="${output_name}.$extension"
 fi
 
-printf "\n${YELLOW}${BOLD}Repairing audio in $filename.$extension | output: $output${NORMAL}\n"
+printf "\n${YELLOW}${BOLD}Copy left audio channeel to right channel in $filename.$extension | output: $output${NORMAL}\n"
 
-ffmpeg -y -stats -loglevel level+error -i "$filename.$extension" -c:v copy -ac 1 -map 0 "$output"
+ffmpeg -y -stats -loglevel level+error -i "$filename.$extension" -c:v copy -af "pan=stereo|c0=c0|c1=c0" -map 0 "$output"
 
-printf "\n${GREEN}${BOLD}Done repairing audio in $filename.$extension | output: $output${NORMAL}\n\n"
+printf "\n${GREEN}${BOLD}Done copying left audio channel to right channel in $filename.$extension | output: $output${NORMAL}\n\n"
 
diff --git a/dotfiles/bin/copy-right-audio-channel-to-left b/dotfiles/bin/copy-right-audio-channel-to-left
new file mode 100644
index 0000000..5dd874a
--- /dev/null
+++ b/dotfiles/bin/copy-right-audio-channel-to-left
@@ -0,0 +1,50 @@
+#!/usr/bin/env bash
+
+# Use this to copy audio from the right channel to the left. 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 [[ $1 == "" ]]; then
+    printf "${BOLD}${RED}Usage: copy-right-audio-channel-to-left <filename> <optional output name>${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}Copy right audio channeel to left channel in $filename.$extension | output: $output${NORMAL}\n"
+
+ffmpeg -y -stats -loglevel level+error -i "$filename.$extension" -c:v copy -af "pan=stereo|c0=c1|c1=c1" -map 0 "$output"
+
+printf "\n${GREEN}${BOLD}Done copying right audio channel to left channel in $filename.$extension | output: $output${NORMAL}\n\n"
+