fix_left2stereo

#!/bin/bash
# left 2 stereo mix

scriptdir=`dirname "$0"`
. "$scriptdir/mmfunctions" || { echo "Missing '$scriptdir/mmfunctions'. Exiting." ; exit 1 ;};

cleanup(){
	log -a "Process aborted"
	exit 1
}

trap cleanup SIGHUP SIGINT SIGTERM
log -b

suffix="_left2stereo"

if test $# != 1 ; then
	report -wt "You must supply one argument. Refer to a file after calling the `basename $0` script."; exit
fi

while [ "$*" != "" ] ; do

	input_movie="$1"
	name=`basename "$1"`

	codec_tag_string=`ffprobe -show_streams -print_format compact "$input_movie" 2>/dev/null| grep codec_type=video | grep -o "codec_tag_string=[^|]*" | cut -d= -f2`

	[ "$codec_tag_string" = "mpeg" ] && { ffmpeg_opts+=" -c:v copy -c:a pcm_s24le " ; extension="mxf" ; } ;
	[ "$codec_tag_string" = "mpeg" ] || { ffmpeg_opts+=" -c:v copy -c:a pcm_s24le " ; extension="mov" ; } ;

	if [ -f "${input_movie%.*}${suffix}.${extension}" ] ; then
		report -wt "The intended output of `basename $0` already exists. Skipping for now. Please delete \"${input_movie%.*}${suffix}.${extension}\" and rerun or figure out why you are trying to do this."
	else
		cmd="ffmpeg -i '$input_movie' $ffmpeg_opts -filter pan=stereo:c0=c0:c1=c0 '${input_movie%.*}${suffix}.${extension}'"
		echo "$cmd"
		eval "$cmd"
		report -dt " `basename $0` is done with ${name}."
	fi
	shift
done
log -e