make-xvid - converts any video into XviD

#!/bin/sh

# Simply converts anything to XviD

ERROR(){
    printf "\033[0;31mError - $1\033[0m\n"
    exit 1
}
IPATH="/home/pintcat/skripte/"
[ ! -x "$IPATH"ffprogress.sh ] && ERROR "ffprogress.sh is either missing or not executable."
. "$IPATH"ffprogress.sh

# Check source & target path & file name
[ -z "$1" ] || [ ! -e "$1" ] && ERROR "Wrong input path or file name or none at all.\n"
if [ -z "$2" ]; then
    FF_OUTPUT=$(printf "${1%.*}" | sed 's:/*$::').avi    # remove all trailing slashes & add suffix
else
    FF_OUTPUT=${2%*.avi}
    [ -z ${2#$FF_OUTPUT*} ] && FF_OUTPUT="$2".avi || FF_OUTPUT="$2"
fi
if [ -e "$OUT" ]; then
    read -r -p "Output file already exists. Overwrite (y/N)? " OPT
    case $OPT in
        y|Y)
            rm -f "$OUT";;
        *)
            ERROR "Unable to write output file.\n";;
    esac
fi

RESX=720
RESY=406
FRAMEX=720
FRAMEY=512
POSX=$((($FRAMEX-$RESX)/2))
POSY=$((($FRAMEY-$RESY)/2))

# Video filter:

#VIDEO_CROP="crop=320:180:0:30,"
VIDEO_SCALE="scale=$RESX:$RESY:sws_flags=bicubic+accurate_rnd,setsar=1:1,"
#VIDEO_PAD="pad=$FRAMEX:$FRAMEY:$POSX:$POSY,"

# These filter options convert HDR10 color space to the more commmon SDR8 (yuv420)

#VIDEO_COLCONV="zscale=tin=smpte2084:min=bt2020nc:pin=bt2020:rin=tv:t=smpte2084:m=bt2020nc:p=bt2020:r=tv,"
#VIDEO_COLCONV=$VIDEO_COLCONV"zscale=t=linear:npl=100,"
#VIDEO_COLCONV=$VIDEO_COLCONV"format=gbrpf32le,"
#VIDEO_COLCONV=$VIDEO_COLCONV"zscale=p=bt709,"
#VIDEO_COLCONV=$VIDEO_COLCONV"tonemap=tonemap=mobius:param=0.1:desat=0,"
#VIDEO_COLCONV=$VIDEO_COLCONV"zscale=t=bt709:m=bt709:r=tv:dither=none,"
#VIDEO_COLCONV=$VIDEO_COLCONV"format=yuv420p,"

# This filter scales the framerate down to 25fps (PAL standard)

VIDEO_FPSCONV="fps=25,zscale=rangein=tv:range=tv -pix_fmt yuv420p -r 25/1"

VIDEO_FILTER="$VIDEO_CROP$VIDEO_SCALE$VIDEO_PAD$VIDEO_COLCONV$VIDEO_FPSCONV"

# Encoder:
XVID="libxvid -ssim_acc 0 -me_quality 6 -trellis 1 -g 25 -bf 1 -qmin 1 -q:v 4"
#XVID="libxvid -variance_aq 1 -ssim_acc 0 -me_quality 6 -trellis 1 -g 250 -bf 1 -qmin 1 -q:v 4"
AC3="ac3 -b:a 128k -ar 48000 -ac 2 -channel_coupling 1 -dmix_mode 3"

# Use this to limit the output to a certain number of frames
#VIDEO_LIMIT="-vframes 25"

FF_ARGS="-vf $VIDEO_FILTER -acodec $AC3 -vcodec $XVID $VIDEO_LIMIT -f avi"
FF_INPUT=$1
if ! FF_PROGRESS; then
    printf "\n\033[0;31mError - $FF_ERROR\033[0;32m\n\n"
    exit 1
fi
printf "\n\n\n\n"
rm -f $FF_LOG $FF_CMD