convert-a-to-b

#!/usr/bin/env bash

clear_line() {
    printf "\r\033[2K"
}

print_status() {
    printf "\e[3;4m%s\e[0m\r" "$1"
}

print_status_report() {
    clear_line
    print_status "$1"
}

print_status_success() {
    printf "\e[30;42m %s \e[0m" "$1"
    shift
    if [ -n "$1" ]; then
        printf " \e[4m%s\e[0m" "$*"
    fi
    printf "\n"
}

print_status_error() {
    printf "\e[1;101m %s \e[0m\n" "$1"
}

if [[ $# -lt 2 ]]; then
    echo "convert-a-to-b"
    echo "   Convert all files between (media) file types"
    echo "   If only target and source formats are specified, it will convert all files in the current directory"
    echo "   Optionally, more parameters can be provided to specify which files to convert"
    echo ""
    echo "Usage: convert-a-to-b FROM_FORMAT TO_FORMAT [file file2 file3]"
    echo "       eg. convert-a-to-b \"webm\" \"mp4\""
    exit
fi

to_extension="$2"
from_extension="$1"
shift
shift

if [[ "$to_extension" == "$from_extension" ]]; then
    exit
fi

FILES=()
if [ $# -eq 0 ]; then
    print_status "Scanning..."
    while IFS= read -r -d $'\0'; do
        FILES+=("$REPLY")
    done < <(find . -name "*.$from_extension" -maxdepth 1 -type f -print0 2>/dev/null)
    print_status_report "Scanned"
else
    for file in "$@"; do
        filename="$(basename -- "$file")"
        extension="${filename##*.}"

        if [[ "$extension" == "$from_extension" ]]; then
            FILES+=("$file")
        fi
    done
fi

MAX_FILE_LEN=-1
for str in "${FILES[@]}"; do
    filename="$(basename -- "$str")"
    extension="${filename##*.}"
    filename="${filename%.*}"

    if [[ ${#filename} -gt ${MAX_FILE_LEN} ]]; then
        MAX_FILE_LEN=${#filename}
    fi
done

total="${#FILES[@]}"

success=0
for filepath in "${FILES[@]}"; do
    location="$PWD"

    filename="$(basename -- "$filepath")"
    extension="${filename##*.}"
    filename="${filename%.*}"

    oldName="${filename}.${extension}"
    newName="${filename}.${to_extension}"

    oldFull="${location}/${oldName}"
    newFull="${location}/${newName}"

    if [ -f "$newFull" ]; then
        if [ -f "$oldFull" ]; then
            if command -v kioclient5 &>/dev/null; then
                kioclient5 move "$newFull" trash:/ 2>/dev/null
            elif command -v trash-put &>/dev/null; then
                trash-put "$newFull"
            fi
        fi
    fi

    printf "Converting \e[1;36;40m %-${MAX_FILE_LEN}s \e[0m from \e[1m\`%s\`\e[0m to \e[1m\`%s\`\e[0m... " "$filename" "$extension" "$to_extension"

    __OLD_TIMEFORMAT=$TIMEFORMAT
    export TIMEFORMAT='%3lR'
    res="$( (time ffmpeg -y -loglevel panic -i "$oldFull" -max_muxing_queue_size 1024 -vf 'scale=ceil(iw/2)*2:ceil(ih/2)*2' -ab 320k -map_metadata 0 "$newFull") 2>&1)"
    res_exit_code=$?
    cmd_duration="$(echo "$res" | tail -n1)"
    export TIMEFORMAT=${__OLD_TIMEFORMAT}
    unset __OLD_TIMEFORMAT

    if [[ "$res_exit_code" -ne '0' ]]; then
        print_status_error "DEAD ($res_exit_code)"
        rm "$newFull" 2>/dev/null
        continue
    fi

    if [ -z "$(find "$newFull" -maxdepth 1 -type f -size +1k 2>/dev/null)" ]; then
        print_status_error "FAIL"
        rm "$newFull" 2>/dev/null
        continue
    fi

    touch -r "$oldFull" "$newFull"
    if command -v kioclient5 &>/dev/null; then
        kioclient5 move "$oldFull" trash:/ 2>/dev/null
    elif command -v trash-put &>/dev/null; then
        trash-put "$oldFull"
    fi
    print_status_success "DONE" "$cmd_duration"
    ((success++))
done

print_status_success "FINISHED $success/$total"