From c276345ec6d32cb81fee5273b32e133f4eaeea8a Mon Sep 17 00:00:00 2001
From: q3aql <q3aql@openmailbox.org>
Date: Tue, 9 Mar 2021 12:51:21 +0100
Subject: [PATCH] Detect audio 5.1/7.1 & change to stereo (ks-mp3/oga)

---
 src/ks-mp3 | 14 ++++++++++++--
 src/ks-oga | 14 ++++++++++++--
 2 files changed, 24 insertions(+), 4 deletions(-)

diff --git a/src/ks-mp3 b/src/ks-mp3
index efcf2ff..06f5259 100755
--- a/src/ks-mp3
+++ b/src/ks-mp3
@@ -246,13 +246,23 @@ else
 	else
 		genre_file="${genre_file}"
 	fi
+	
+	# Check audio 5.1 or 7.1
+	audio_5_7_1=$(${p_ffmpeg} "${1}" 2>&1 | grep Stream | tr -s " " | grep "Audio:" | grep "${audio_track}" | grep -i "5.1")
+	audio_5_7_1_2=$(${p_ffmpeg} "${1}" 2>&1 | grep Stream | tr -s " " | grep "Audio:" | grep "${audio_track}" | grep -i "7.1")
+	audio_5_7_1="${audio_5_7_1}${audio_5_7_1_2}"
+	if [ -z "${audio_5_7_1}" ] ; then
+		stereo_params="-ac 2"
+	else
+		stereo_params="-ac 2 -clev 3dB -slev -6dB"
+	fi
 
 	# Show commands for conversion
 	echo ""
 	echo "* COMMANDS THAT WILL BE EXECUTED:"
 	echo ""
 	echo "  # Convert the file '${1}' to MP3 Audio"
-	echo "  ${p_ffmpeg} \"${1}\" -map ${audio_track} -c:a ${acodec} -b:a ${b_acodec} -metadata title=\"${name_title}\" -metadata date=\"${year_num}\" -metadata genre=\"${genre_file}\" -metadata album=\"${album_title}\" -metadata artist=\"${artist_title}\" -metadata track=\"${track_num}\" \"${2}.${v_ext}\""
+	echo "  ${p_ffmpeg} \"${1}\" -map ${audio_track} -c:a ${acodec} -b:a ${b_acodec} ${stereo_params} -metadata title=\"${name_title}\" -metadata date=\"${year_num}\" -metadata genre=\"${genre_file}\" -metadata album=\"${album_title}\" -metadata artist=\"${artist_title}\" -metadata track=\"${track_num}\" \"${2}.${v_ext}\""
 
 	# Execute commands for conversion
 	echo ""
@@ -260,6 +270,6 @@ else
 	if [ "${run_commands_ffmpeg}" == "n" ] ; then
 		exit
 	else
-		${p_ffmpeg} "${1}" -map ${audio_track} -c:a ${acodec} -b:a ${b_acodec} -metadata title="${name_title}" -metadata date="${year_num}" -metadata genre="${genre_file}" -metadata album="${album_title}" -metadata artist="${artist_title}" -metadata track="${track_num}" "${2}.${v_ext}"
+		${p_ffmpeg} "${1}" -map ${audio_track} -c:a ${acodec} -b:a ${b_acodec} ${stereo_params} -metadata title="${name_title}" -metadata date="${year_num}" -metadata genre="${genre_file}" -metadata album="${album_title}" -metadata artist="${artist_title}" -metadata track="${track_num}" "${2}.${v_ext}"
 	fi
 fi
diff --git a/src/ks-oga b/src/ks-oga
index 44c256c..6c5d574 100755
--- a/src/ks-oga
+++ b/src/ks-oga
@@ -246,13 +246,23 @@ else
 	else
 		genre_file="${genre_file}"
 	fi
+	
+	# Check audio 5.1 or 7.1
+	audio_5_7_1=$(${p_ffmpeg} "${1}" 2>&1 | grep Stream | tr -s " " | grep "Audio:" | grep "${audio_track}" | grep -i "5.1")
+	audio_5_7_1_2=$(${p_ffmpeg} "${1}" 2>&1 | grep Stream | tr -s " " | grep "Audio:" | grep "${audio_track}" | grep -i "7.1")
+	audio_5_7_1="${audio_5_7_1}${audio_5_7_1_2}"
+	if [ -z "${audio_5_7_1}" ] ; then
+		stereo_params="-ac 2"
+	else
+		stereo_params="-ac 2 -clev 3dB -slev -6dB"
+	fi
 
 	# Show commands for conversion
 	echo ""
 	echo "* COMMANDS THAT WILL BE EXECUTED:"
 	echo ""
 	echo "  # Convert the file '${1}' to OGG Audio"
-	echo "  ${p_ffmpeg} \"${1}\" -map ${audio_track} -c:a ${acodec} -b:a ${b_acodec} -metadata title=\"${name_title}\" -metadata date=\"${year_num}\" -metadata genre=\"${genre_file}\" -metadata album=\"${album_title}\" -metadata artist=\"${artist_title}\" -metadata track=\"${track_num}\" \"${2}.${v_ext}\""
+	echo "  ${p_ffmpeg} \"${1}\" -map ${audio_track} -c:a ${acodec} -b:a ${b_acodec} ${stereo_params} -metadata title=\"${name_title}\" -metadata date=\"${year_num}\" -metadata genre=\"${genre_file}\" -metadata album=\"${album_title}\" -metadata artist=\"${artist_title}\" -metadata track=\"${track_num}\" \"${2}.${v_ext}\""
 
 	# Execute commands for conversion
 	echo ""
@@ -260,6 +270,6 @@ else
 	if [ "${run_commands_ffmpeg}" == "n" ] ; then
 		exit
 	else
-		${p_ffmpeg} "${1}" -map ${audio_track} -c:a ${acodec} -b:a ${b_acodec} -metadata title="${name_title}" -metadata date="${year_num}" -metadata genre="${genre_file}" -metadata album="${album_title}" -metadata artist="${artist_title}" -metadata track="${track_num}" "${2}.${v_ext}"
+		${p_ffmpeg} "${1}" -map ${audio_track} -c:a ${acodec} -b:a ${b_acodec} ${stereo_params} -metadata title="${name_title}" -metadata date="${year_num}" -metadata genre="${genre_file}" -metadata album="${album_title}" -metadata artist="${artist_title}" -metadata track="${track_num}" "${2}.${v_ext}"
 	fi
 fi