[LAU] Generate "automagic" music videos with ffmpeg & friends

[Yassin Philip]

Hi Listers!

Here is a little tooly that I made that may be be of any use to you guys ;

Today, if you want to publish a song, pretty soon they're going to ask 
your for "the video". But sometimes you don't have the time / money to 
do it. Heck, it's a job. The "Lost Week" video 
<https://www.youtube.com/watch?v=O27yC-qLlMM> took me like a (big. Huge) 
week to put together, not counting shooting time. BTW it was edited in 
KDEnlive, but since No Sister 
<https://www.youtube.com/watch?v=7EH9jSnYAGI> (and my Why, Phil show 
<https://www.youtube.com/watch?v=2zZO7-wo2_o> and all) I use Blender for 
that kind of things now.

Back on topic : You don't have time to put together a proper video for 
your shiny new because you have a life and recording the song already 
took the best of it lately.

Here is a script 
<https://github.com/xaccrocheur/kituu/blob/master/scripts/px-video-maker.sh> 
to quickly generate a cool-looking music video 
<https://www.youtube.com/watch?v=t-u18CbdjBE>, given the sound file, the 
cover artwork image and an optional ending bit :

#!/usr/bin/env bash

FILE_PATH="$1"
FFMPEG="ffmpeg"
ARTIST="$2"
ALBUM="$3"
COVER_FILE_PATH="$4"
EFFECT="$5"

if [ "$#" -ne 5 ]; then
     echo "Usage: $0 [audio file path] 'artist name' 'album name' 
[artwork image file path] [point|line|p2p|cline]"
     exit
fi

convert -resize 1280x720 "${COVER_FILE_PATH}" -background none -gravity 
center -extent 1280x720 "${COVER_FILE_PATH}.jpg"

$FFMPEG -y -i "${FILE_PATH}" -loop 1 -i "${COVER_FILE_PATH}.jpg" 
-filter_complex "[0:a] 
showwaves=s=1280x310:mode=${EFFECT}:r=25,colorkey=0x000000:0.1:0.5[wave];[1:v][wave] 
overlay=y=H-h:eval=init[canvas];[canvas]drawtext=fontfile='Jura-Book.ttf':fontsize=60:text='${ARTIST}':x=30:y=(h-70-text_h*2.5):fontcolor=white:shadowy=2:shadowx=2:shadowcolor=black,drawtext=fontfile='Jura-Book.ttf':fontsize=72:text='${ALBUM}':x=20:y=(h-70-text_h):fontcolor=ff6600:shadowy=2:shadowx=2:shadowcolor=black" 
-shortest -codec:v libx264 -crf 18 -preset fast -codec:a aac -strict -2 
-b:a 192k "${FILE_PATH}-composite.mp4"

if [[ -e "end.mp4" ]]; then
     $FFMPEG -y -i "${FILE_PATH}-composite.mp4" -i "end.mp4" 
-filter_complex "[0:0] [0:1] [1:0] [1:1] concat=n=2:v=1:a=1 [v] [a]" 
-map "[v]" -map "[a]" "${ARTIST}-${ALBUM}.mp4"

     rm -rf "${FILE_PATH}-composite.mp4"
else
     mv "${FILE_PATH}-composite.mp4" "${ARTIST}-${ALBUM}.mp4"
fi

rm -rf "${COVER_FILE_PATH}.jpg"

echo -e "
################################################
DONE : ${ARTIST}-${ALBUM}.mp4"

This will

  * Take the (PNG) cover, and center it inside a 1280x720 (AKA 720p)
    pixels video ;
  * Generate a "wave" of the (WAV) sound file ;
  * Print "Artist" in Orange, And then "Title" in White, below, slightly
    bigger and offset to the left ;
  * Merge the 3 together ;
  * If there exists a file named "end.mp4" in the directory, append it
    to the final video ;
  * Clean up everything, and produce a file named "Artist-Title.mp4" in
    720p.

Notes:

  * This script depends on the ffmpeg and imagemagick packages
  * The last argument is the style of the dancing waveform, take a short
    audio file to experiment with all 4 of them
  * The "end.mp4" file is optional, it's there if you want an ending
    credit / legal / whatever bit, or a nice fade out, anything. It's
    scaled to fit.
  * If there is a "Jura-Book.ttf" font file in the directory from which
    the script is invoked, it will be used, otherwise your default serif
    font will be.

With it, you can make that kind of music video 
<https://www.youtube.com/watch?v=t-u18CbdjBE> ; hope it's useful, cheers 
everybody, keep on rocking it!


yPhil

-- 
Yassin "xaccrocheur" Philip
http://manyrecords.com / http://yassinphilip.bitbucket.org

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