infojunkie/youtube-album.md

## youtube-album.md

      
    Raw
  

              youtube-album.md
            
          
    youtube-album

A recipe to prepare audio file(s) for YouTube upload. Video will be a slideshow of images on repeat.
Requires: imagemagick ffmpeg

Convert images to required size. Here I assume .png files and output to png/ folder. See http://www.imagemagick.org/Usage/crop/#extent

for f in *.png; do convert "$f" -resize 800x600 -gravity center -background black -extent 800x600 png/"$f".png; done

Generate video out of pngs. Here each image is shown for 20 seconds. See https://trac.ffmpeg.org/wiki/Slideshow and https://en.wikibooks.org/wiki/FFMPEG_An_Intermediate_Guide/image_sequence#Filename_patterns

ffmpeg -framerate 1/20 -pattern_type glob -i "png/*.png" -c:v libx264 -vf "fps=25,format=yuv420p" png.mp4

Concatenate audio files. See https://trac.ffmpeg.org/wiki/Concatenate

printf "file '%s'\n" ./*.flac > files.txt
ffmpeg -f concat -safe 0 -i files.txt files.flac

Concatenate png video enough times to cover audio duration. See http://superuser.com/a/1116107/55867 for rationale.

for i in {1..10}; do printf "file '%s'\n" png.mp4 >> pngs.txt; done
ffmpeg -f concat -safe 0 -i pngs.txt -c copy pngs.mp4

Create YouTube video using acceptable encoding settings. See https://www.virag.si/2015/06/encoding-videos-for-youtube-with-ffmpeg/

ffmpeg -i pngs.mp4 -i files.flac -shortest -codec:v libx264 -crf 21 -bf 2 -flags +cgop -pix_fmt yuv420p -codec:a aac -strict -2 -b:a 384k -r:a 48000 -movflags faststart youtube.mp4

Generate a YouTube track listing to copy-paste in the video description.

youtube-playlist.sh *.flac

Generate a video file with chapters.

youtube-chapters.sh *.flac > chapters
ffmpeg -i youtube.mp4 -i chapters -map_metadata 1 -codec copy youtube-chapters.mp4

  
## youtube-chapters.sh
#!/bin/bash

# Show album track list in ffmpeg metadata format
#
# Only works with .flac atm :-(
#
# Requires: metaflac sox

# https://stackoverflow.com/a/43444305/209184
round() {
	printf "%.${2}f" "${1}"
}

echo ";FFMETADATA1"

offset=0
for f in "$@"
do
	start=$(round $offset 0)
	echo "[CHAPTER]"
	echo "TIMEBASE=1/1000"
	echo "START=$start"
	delta=$(soxi -D "$f")
	offset=$(bc -l <<< "$offset + ($delta * 1000)")
	end=$(round $offset 0)
	echo "END=$end"
	title=$(metaflac "$f" --show-tag=TITLE | sed s/.*=//g)
	echo "TITLE=$title"
done

## youtube-playlist.sh
#!/bin/bash

# Show album track list in YouTube-friendly format including
# clickable track offsets.
#
# Only works with .flac atm :-(
#
# Requires: metaflac sox

start=0
for f in "$@"
do
        offset=$(date -u -d "0 $start sec" +"%H:%M:%S")
        title=$(metaflac "$f" --show-tag=TITLE | sed s/.*=//g)
        trackno=$(metaflac "$f" --show-tag=TRACKNUMBER | sed s/.*=//g)
        echo "$offset" "$trackno" "$title"
        end=$(soxi -D "$f")
        start=$(bc -l <<< "$start + $end")
done
	#!/bin/bash

	# Show album track list in ffmpeg metadata format
	#
	# Only works with .flac atm :-(
	#
	# Requires: metaflac sox

	# https://stackoverflow.com/a/43444305/209184
	round() {
	printf "%.${2}f" "${1}"
	}

	echo ";FFMETADATA1"

	offset=0
	for f in "$@"
	do
	start=$(round $offset 0)
	echo "[CHAPTER]"
	echo "TIMEBASE=1/1000"
	echo "START=$start"
	delta=$(soxi -D "$f")
	offset=$(bc -l <<< "$offset + ($delta * 1000)")
	end=$(round $offset 0)
	echo "END=$end"
	title=$(metaflac "$f" --show-tag=TITLE \| sed s/.*=//g)
	echo "TITLE=$title"
	done
	#!/bin/bash

	# Show album track list in YouTube-friendly format including
	# clickable track offsets.
	#
	# Only works with .flac atm :-(
	#
	# Requires: metaflac sox

	start=0
	for f in "$@"
	do
	offset=$(date -u -d "0 $start sec" +"%H:%M:%S")
	title=$(metaflac "$f" --show-tag=TITLE \| sed s/.*=//g)
	trackno=$(metaflac "$f" --show-tag=TRACKNUMBER \| sed s/.*=//g)
	echo "$offset" "$trackno" "$title"
	end=$(soxi -D "$f")
	start=$(bc -l <<< "$start + $end")
	done