commit 514e6788b34aa2fea81e685a03b0f0bc9e449157 parent 9e67470e2373361dea9c5707f30323bff524023d Author: Anders Damsgaard <anders@adamsgaard.dk> Date: Sun, 16 Aug 2020 20:09:05 +0200 Generate title slides in separate script Diffstat:
| A | brtv-generate-title-slides.sh | | | 64 | ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
1 file changed, 64 insertions(+), 0 deletions(-)
diff --git a/brtv-generate-title-slides.sh b/brtv-generate-title-slides.sh @@ -0,0 +1,64 @@ +#!/bin/sh +# generate title slide animation for each hashtag in file specified by stdin. +# stdin would typically be annna's module/hashtags/hashtags.txt +# requirements: ffmpeg(1), convert(1) + + +### CONFIGURATION START + +# output title animations dir +title="title" + +# ffmpeg flags for generated videos +video_ext="webm" +ffmpeg_codec="-loglevel error -acodec libopus -b:a 96K -vcodec libvpx -b:v 64k -f webm -vf scale=1280:-1 -r 30 -ac 2" + +# target video resolution +video_resolution=1280x720 + +# slide style +bgcolor=magenta +fcolor=white + +# show title slides for this duration [s] +title_display_time=5 + +### CONFIGURATION END + + +die() { + printf '%s: error: %s\n' "${0##*/}" "$1" >&2 + exit 1 +} + +regeximatch() { + printf '%s' "$1" | grep -iEq "$2" +} + +if [ $# -ne 1 ]; then + die "usage: ${0##*/} <hashtags-file>" +fi + +title_slide() { + img="$(basename "${1%.*}".png)" + printf 'title_slide %s -> %s\n' "$1" "$img" + convert -size "$video_resolution" "xc:${bgcolor}" \ + -pointsize 48 -fill "$fgcolor" \ + -gravity center -draw "text 0,0 '#${img%.*}'" "$img" + ffmpeg -y \ + -f lavfi \ + -i anullsrc=r=48000 \ + -i "$img" \ + -t "${title_display_time}" \ + $ffmpeg_codec \ + "$2" && rm "$img" +} + +mkdir -p "$title" + +# make title slide for every file in $1/ if they do not already exist +while IFS=' +' read -r line; do + out_path="${title}/$(basename "${f%.*}.${video_ext}")" + [ ! -f "$out_path" ] && title_slide "$f" "$out_path" +done