videosoundpost

#!/bin/bash

echo -e "Usage: videosoundpost <video>"

video=$1
videofilename=${video##*'/'}
beforedot=${videofilename%%'.'*}
afterdot=${videofilename##*'.'}
sound="/tmp/sound.mp3"
muteoriginal="/tmp/mute.$afterdot"
mutewebm="/tmp/video.webm"

echo -e "Extracting audio..."
ffmpeg -hide_banner -loglevel warning -stats -i "$video" $sound

echo -e "Uploading audio to catbox.moe"
HOST="https://catbox.moe/user/api.php"
link=$(curl -F "reqtype=fileupload" -F "fileToUpload=@$sound" $HOST)

echo -e "Uploaded sound to: $link"


ffmpeg -hide_banner -loglevel warning -i "$video" -c copy -an "$muteoriginal"

O_SIZE=$(echo "$(du -k --apparent-size "$muteoriginal" | cut -d '	' -f 1) 1024" | awk '{print $1 / $2}')
T_SIZE="3.8" # target size in MB

if (( $(echo "$O_SIZE > $T_SIZE" |bc -l) )); then
    echo "original video larger than target size"
else
    echo "original video smaller than target size"
    T_SIZE=$O_SIZE
fi

# Original duration in seconds
O_DUR=$(\
    ffprobe \
    -v error \
    -show_entries format=duration \
    -of csv=p=0 "$muteoriginal")

# Equals 1 if target size is ok, 0 otherwise
IS_MINSIZE=$(\
    awk \
    -v size="$T_SIZE" \
    -v minsize="$T_MINSIZE" \
    'BEGIN { print (minsize < size) }')

# Give useful information if size is too small
if [[ $IS_MINSIZE -eq 0 ]]; then
    printf "%s\n" "Target size ${T_SIZE}MB is too small!" >&2
    printf "%s %s\n" "Try values larger than" "${T_MINSIZE}MB" >&2
    exit 1
fi

# Calculate target video rate - MB -> KiB/s
T_VRATE=$(\
    awk \
    -v size="$T_SIZE" \
    -v duration="$O_DUR" \
    -v audio_rate="0" \
    'BEGIN { print  ( ( size * 8192.0 ) / ( 1.048576 * duration ) - audio_rate) }')

PROBE=$(ffprobe -v error -select_streams v:0 -show_entries stream=width,height -of csv=s=x:p=0 "$muteoriginal")
ORES=${PROBE##*'x'}
TRES=480

if [ "$ORES" -ge $TRES ]; then
    echo "Downscaling video to 480p"
else
    TRES=$ORES
fi

# Perform the conversion
echo "Target resolution is: '$TRES'p"
echo "Target bitrate is: '$T_VRATE'K"
echo -e "Converting video to .webm"
ffmpeg -hide_banner -loglevel warning -stats -i "$muteoriginal" -vf scale=-1:"$TRES" -framerate 30 -c:v libvpx -b:v "$T_VRATE"K "$mutewebm"

encode=$(echo "$link" | tail -c +9 | sed 's/:/%3A/g' | tr "/" "-" | sed "s/-/%2F/g")
final=${beforedot}[sound=$encode].webm
echo -e "$final"

# Add filename to clipboard
echo -n "$final" | xclip -selection clipboard

# Copy video with the appropriate filename
echo -e "Copying video..."
cp "$mutewebm" "$final"

# Clean up
rm "$sound"
rm "$muteoriginal"
rm "$mutewebm"