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	tAdd preliminary brtv script for converting media and starting server - bitreic…
	git clone git://src.adamsgaard.dk/bitreich-memestats
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	---
	commit 4cd41bb24ae99df1a7b018632619ed6357763f15
	parent 8b472486508e8fc511caba8c525d6519e1ee7383
	Author: Anders Damsgaard <[email protected]>
	Date: Sun, 19 Apr 2020 20:09:52 +0000

	Add preliminary brtv script for converting media and starting server

	Diffstat:
	A brtv-start.sh \| 116 ++++++++++++++++++++++++++++++

	1 file changed, 116 insertions(+), 0 deletions(-)
	---
	diff --git a/brtv-start.sh b/brtv-start.sh
	t@@ -0,0 +1,116 @@
	+#!/bin/sh
	+
	+# mkv streaming server executable
	+# git://github.com/klaxa/mkvserver_mk2
	+bin=mkvserver_mk2
	+
	+# memecache source dir
	+memecache=../memecache
	+
	+# converted memecache dir
	+memecache_conv=memecache
	+
	+# title animations dir
	+title="title"
	+
	+# desired ffmpeg codec flags
	+ffmpeg_codec="-c:v libx264 -c:a libvorbis -f matroska"
	+
	+# port for streaming socket (combined stream hosted on port 8080)
	+commport=12345
	+
	+# target video resolution
	+video_resolution=1280x720
	+
	+# slide style
	+bgcolor=magenta
	+fcolor=white
	+
	+# show image memes for this duration [s]
	+image_display_time=10
	+
	+# show title slides for this duration [s]
	+title_display_time=5
	+
	+
	+
	+fit_img_16_9() {
	+ convert -resize "$video_resolution"\> -size "$video_resolution" "$1" \
	+ xc:"$bgcolor" +swap -gravity center -composite "$2"
	+}
	+
	+video_from_img() {
	+ ffmpeg -y \
	+ -f lavfi \
	+ -i anullsrc=r=48000 \
	+ -i "$1" \
	+ -t "00:${3}:00" \
	+ $ffmpeg_codec \
	+ "$2"
	+}
	+
	+title_slide() {
	+ convert -size 640x480 xc:"$bgcolor" -pointsize 48 -fill "$fgcolor" \
	+ -gravity center -draw "text 0,0 '#${1%.}'" "/tmp/${1%.}.png"
	+ ffmpeg -y \
	+ -f lavfi \
	+ -i anullsrc=r=48000 \
	+ -i "/tmp/${1%.*}.png" \
	+ -t "00:${title_display_time}:00" \
	+ $ffmpec_codec\
	+ "$2"
	+}
	+
	+video_conv() {
	+ ffmpeg -y -i "$1" $ffmpeg_codec "$2"
	+}
	+
	+
	+mkdir -p "$title"
	+mkdir -p "$memecache_conv"
	+
	+# generate video from each image
	+for f in "$memecache"/.jpg "$memecache"/.png "$memecache"/*.JPG; do
	+ out="${memecache_conv}/$(basename "${f%.*}.mkv")"
	+ if [ ! -e "$out" ]; then
	+ fit_img_16_9 "$f" "${out%.*}.jpg"
	+ video_from_img "${out%.mkv}.jpg" "${out}" "${image_display_tim…
	+ fi
	+done
	+
	+# make title slides for video and converted images and encode to common codec
	+for f in "$memecache"/*.mkv \
	+ "$memecache"/*.mp4 \
	+ "$memecache"/*.webm \
	+ "$memecache_conv"/*.mkv; do
	+
	+ title_path="${title}/$(basename "${f%.*}.mkv")"
	+ [ ! -e "${title_path}" ] && title_slide "$f" "$title_path"
	+
	+ out="${memecache_conv}/$(basename "${f%.*}.mkv")"
	+ [ ! -e "${out}" ] && video_conv "$f" "$out"
	+done
	+
	+# generate random playlist from converted memes and add title slides
	+find "$memecache_conv" -maxdepth 1 -name "*.mkv" -type f \| sort -R \| \
	+ sed "s/^/file '/;s/$/'/" \| \
	+ awk -v titledir="$title" '
	+ function add_title(s) {
	+ sub(/\.\//, titledir"/", s);
	+ return s
	+ }
	+ {line=$0;
	+ print add_title($line);
	+ print $0}' > playlist
	+
	+netcat -l -p "$commport" \| $bin >/dev/null 2>&1 &
	+sleep 2
	+
	+ffmpeg -f concat -safe 0 -i playlist \
	+ -f matroska \
	+ $ffmpeg_codec \
	+ -max_muxing_queue_size 9999 \
	+ tcp://localhost:$commport
	+
	+
	+pkill $bin