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	brtv-generate-title-slides.sh - bitreich-tv - Meme TV encoding and streaming
	git clone git://bitreich.org/bitreich-tv git://enlrupgkhuxnvlhsf6lc3fziv5h2hhfr…
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	brtv-generate-title-slides.sh (1626B)
	---
	1 #!/bin/sh
	2 # generate title slide animation for each hashtag in file specified by s…
	3 # stdin would typically be annna's module/hashtags/hashtags.txt
	4 # requirements: ffmpeg(1), convert(1)
	5
	6
	7 ### CONFIGURATION START
	8
	9 # output title animations dir
	10 title="/br/gopher/tv/title"
	11
	12 # ffmpeg flags for generated videos
	13 video_ext="webm"
	14 ffmpeg_codec="-loglevel error -acodec libopus -b:a 96K -f webm -vf scale…
	15
	16 # target video resolution
	17 video_resolution=1280x720
	18
	19 # slide style
	20 # xc:$color ( https://imagemagick.org/script/color.php )
	21 # /some/file.png
	22 bgcontent=/br/gopher/tv/bitreich-tv-bg.png
	23 fgcontent=/br/gopher/tv/bitreich-tv-title-fg.png
	24
	25 # show title slides for this duration [s]
	26 title_display_time=5
	27
	28 # logo to draw in background
	29 logo="bitreichtv.vtv"
	30
	31 ### CONFIGURATION END
	32
	33
	34 temp="$(mktemp).png"
	35
	36 title_slide() {
	37 # Don't forget the whitespace at the end of the logo.
	38 convert -font "Liberation-Mono" \
	39 -size "$video_resolution" \
	40 "${bgcontent}" \
	41 "${fgcontent}" \
	42 -gravity center \
	43 -composite \
	44 -stroke '#000000' \
	45 -strokewidth 2 \
	46 -fill '#FFFFFF' \
	47 -gravity north \
	48 -pointsize 13 \
	49 -draw "text -70,240 '$(cat "$logo")' " \
	50 -draw "text -70,520 'Playing: ${1}'" \
	51 "$temp"
	52
	53 ffmpeg -y \
	54 -f lavfi \
	55 -i anullsrc=r=48000 \
	56 -i "$temp" \
	57 -t "${title_display_time}" \
	58 $ffmpeg_codec \
	59 "$2" < /dev/null
	60 printf '%s\n' "$2"
	61 }
	62
	63 mkdir -p "$title"
	64
	65 # make title slide for every tag in first column of stdin
	66 # (if title slide doesn't already exist)
	67 while read -r tag url; do
	68 out="${title}/${tag#\#}.${video_ext}"
	69 if [ ! -f "$out" ]; then
	70 title_slide "$tag" "$out"
	71 fi
	72 done