danielfomin96/ffmpeg

## ffmpeg
#!/bin/bash -
#title           :ffmpeg
#description     :This script is a wrapper for jellyfin ffmpeg to downmix audio to stereo using a custom formula
#author          :Daniel Fomin
#date            :20230104
#version         :0.2
#reference       :https://superuser.com/questions/852400/properly-downmix-5-1-to-stereo-using-ffmpeg
#
#
#==============================================================================

###############################################################################
# Installation Notes:
#   1. Put wrapper in directory accessible from jellyfin
#   2. `chmod +x path/to/wrapper/dir/ffmpeg`
#   3. `ln -s $(which ffprobe) path/to/wrapper/dir/` to the same directory
#   4. Point jellyfin to the wrapper directory
#
###############################################################################

function join { local IFS=$'\n'; echo "${*}"; }

args=$(join "${@}")

match='-ac\n[3-9]'
replace='-af\npan=stereo|FL<0.707*FC+0.707*FL+0.707*BL+0.5*LFE|FR<0.707*FC+0.707*FR+0.707*BR+0.5*LFE'
ffmpeg="/usr/lib/jellyfin-ffmpeg/ffmpeg"

readarray -t new_args < <(sed -z "s/$match/$replace/g" <<<"$args")

#echo "Command Rewrite: $ffmpeg $new_args" 1>&2

$ffmpeg "${new_args[@]}"
exit $?
	#!/bin/bash -
	#title :ffmpeg
	#description :This script is a wrapper for jellyfin ffmpeg to downmix audio to stereo using a custom formula
	#author :Daniel Fomin
	#date :20230104
	#version :0.2
	#reference :https://superuser.com/questions/852400/properly-downmix-5-1-to-stereo-using-ffmpeg
	#
	#
	#==============================================================================

	###############################################################################
	# Installation Notes:
	# 1. Put wrapper in directory accessible from jellyfin
	# 2. `chmod +x path/to/wrapper/dir/ffmpeg`
	# 3. `ln -s $(which ffprobe) path/to/wrapper/dir/` to the same directory
	# 4. Point jellyfin to the wrapper directory
	#
	###############################################################################

	function join { local IFS=$'\n'; echo "${*}"; }

	args=$(join "${@}")

	match='-ac\n[3-9]'
	replace='-af\npan=stereo\|FL<0.707FC+0.707FL+0.707BL+0.5LFE\|FR<0.707FC+0.707FR+0.707BR+0.5LFE'
	ffmpeg="/usr/lib/jellyfin-ffmpeg/ffmpeg"

	readarray -t new_args < <(sed -z "s/$match/$replace/g" <<<"$args")

	#echo "Command Rewrite: $ffmpeg $new_args" 1>&2

	$ffmpeg "${new_args[@]}"
	exit $?