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#!/bin/env bash
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# Download multiple Youtube videos and convert them
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# Copyright (C) 2019 Pekka Helenius
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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##############################################################################
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# Requirements: youtube-dl, ffmpeg (with appropriate codec support)
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# Usage: youtubedl <video_1_url> <video_2_url> ... <video_n_url>
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########################################################
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DOWNLOAD_DIR=$HOME/Videos
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########################################################
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echo -e "\nNumber of videos:\t$#"
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echo -e "Download destination:\t$DOWNLOAD_DIR"
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CNT=0
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for p in ${@}; do
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VIDEOARRAY[$CNT]=$p
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for video_url in "${VIDEOARRAY[$CNT]}"; do
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echo -e "\n[$((1 + $CNT))] Video download URL:\t$video_url"
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read INPUT_FILENAME <<< $(youtube-dl --get-filename --no-warnings --restrict-filenames -o "%(title)s.%(ext)s" $video_url | sed 's/\.[^.]*$//')
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if [[ ! -z $INPUT_FILENAME ]]; then
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echo -e "[$((1 + $CNT))] Video name:\t\t$(echo $INPUT_FILENAME)"
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youtube-dl --restrict-filenames -o "$DOWNLOAD_DIR/%(title)s.%(ext)s" $video_url
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#Sometimes we get invalid suffix for a file with youtube-dl name command (for example mkv file is stated as mp4 by youtube-dl). To circumvent this problem, find the real file with correct suffix and add it to an array for ffmpeg to process
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TRUNAME=$(ls $DOWNLOAD_DIR | grep "$INPUT_FILENAME")
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VIDEONAMES[$CNT]=$TRUNAME
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fi
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done
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let CNT++
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done
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for converted in $(echo "${VIDEONAMES[*]}"); do
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echo -e "Converting $converted"
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OUTPUT_FILEFORMAT='mp4'
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OUTPUT_FILE=$(echo "$converted" | sed "s/\.\w*$/-converted.$OUTPUT_FILEFORMAT/")
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#This makes sure we use mp4 suffix
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OUTPUT_FILE_AFTER=$(echo "$converted" | sed "s/\.\w*$/.$OUTPUT_FILEFORMAT/")
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ffmpeg -i "$DOWNLOAD_DIR/$converted" -acodec libopus -strict -2 -vcodec libx265 -pix_fmt yuv420p -x265-params crf=28:keyint=240:min-keyint=20 -preset:v veryslow -y "$DOWNLOAD_DIR/$OUTPUT_FILE"
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rm $DOWNLOAD_DIR/$converted
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echo -e "\n[$CNT] Conversion done."
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mv $DOWNLOAD_DIR/$OUTPUT_FILE $DOWNLOAD_DIR/$OUTPUT_FILE_AFTER
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done
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