commit 3a8559a5c96734befbfdb580c7e8a2ab491ea6d4
Author: Anders Damsgaard <anders@adamsgaard.dk>
Date: Tue, 11 Aug 2020 17:29:44 +0200
Add preliminary brtv main script
Diffstat:
| A | brtv-start.sh | | | 151 | ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
1 file changed, 151 insertions(+), 0 deletions(-)
diff --git a/brtv-start.sh b/brtv-start.sh
@@ -0,0 +1,151 @@
+#!/bin/sh
+# generate title animations and start streaming server
+
+pass="$(gpg2 -q -d icecastpass.gpg)"
+
+if [ $# -ne 1 ]; then
+ printf 'usage: %s <memecache_path>\n' "$0" >&2
+ exit
+fi
+
+### CONFIGURATION START
+
+# intermediate playlist file
+playlist="playlist_$(date +%Y-%m-%d)"
+
+# memecache source dir
+memecache="$1"
+
+# converted memecache dir
+memecache_conv="memecache_conv"
+
+# title animations dir
+title="title"
+
+# ffmpeg flags for generated videos
+video_ext="webm"
+ffmpeg_codec="-loglevel error -acodec libopus -b:a 96K -vcodec libvpx -b:v 64k -f webm -vf scale=1280:-1 -r 30 -ac 2"
+out_video="brtv_$(date +%Y-%m-%d).${video_ext}"
+#out_video_duration="24:00:00"
+out_video_duration="00:05:00"
+
+# target video resolution
+video_resolution=1280x720
+
+# slide style
+bgcolor=magenta
+fcolor=white
+
+# show image memes for this duration [s]
+image_display_time=10
+
+# show title slides for this duration [s]
+title_display_time=5
+
+### CONFIGURATION END
+
+
+fit_img_16_9() {
+ convert -resize "$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 "$1" \
+ -t "${image_display_time}" \
+ $ffmpeg_codec \
+ "$2";
+}
+
+title_slide() {
+ img="$(basename "${1%.*}".png)"
+ convert -size "$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}" \
+ $ffmpec_codec \
+ "$2" && rm "$img"
+}
+
+video_conv() {
+ ffmpeg -y -i "$1" $ffmpeg_codec -max_muxing_queue_size 1024 "$2"
+}
+
+mkdir -p "$title"
+mkdir -p "$memecache_conv"
+
+# generate video from each image
+for f in "$memecache"/*.{jpg,jpeg,JPG,png,PNG}; do
+ out="${memecache_conv}/$(basename "${f%.*}.${video_ext}")"
+ if [ -e "$f" ] && [ ! -e "$out" ]; then
+ printf 'in: %s, out: %s\n' "$f" "$out"
+ fit_img_16_9 "$f" "${out%.*}.jpg"
+ video_from_img "${out%.${video_ext}}.jpg" "${out}"
+ fi
+done
+
+# make animation for fallback stream
+if [ ! -f "bitreich-tv.${video_ext}" ]; then
+ title_slide bitreich-tv bitreich-tv.${video_ext}
+fi
+
+
+# make title slides for video and converted images and encode to common codec
+for f in "$memecache"/*.mkv \
+ "$memecache"/*.mp4 \
+ "$memecache"/*.webm \
+ "$memecache_conv"/*."${video_ext}"; do
+
+ title_path="${title}/$(basename "${f%.*}.webm")"
+ [ ! -e "$title_path" ] && title_slide "$f" "$title_path"
+
+ out="${memecache_conv}/$(basename "${f%.*}.webm")"
+ [ ! -e "$out" ] && video_conv "$f" "$out"
+done
+
+# generate random playlist from converted memes and add title slides
+find "$memecache_conv" -maxdepth 1 -name "*.webm" -type f | \
+ sort -R | \
+ awk -v memecachedir="$memecache" -v titledir="$title" '
+ function add_title(s) {
+ sub(/memecache/, "title", s);
+ return s
+ }
+ {line=$0;
+ print "file \""add_title($line)"\"";
+ print "file \""$0"\""}' | sed "s/\"/'/g" > "$playlist"
+ #print "file \""$0"\""}' | sed "s/\"/'/g" |grep -v title> "$playlist"
+
+#printf '\nstarting fallback stream\n'
+#ffmpeg -loglevel quiet \
+# -stream_loop -1 -i bitreich-tv.webm
+# -f webm -codec copy
+# icecast://source:${pass}@localhost:8000/brtvfallback
+
+
+# encode daily video file
+ffmpeg -n -f concat -safe 0 -i "$playlist" \
+ -f "${video_ext}" -cluster_size_limit 2M -cluster_time_limit 5100 -content_type video/webm \
+ -analyzeduration 2M -probesize 2M \
+ -codec copy \
+ -deadline realtime -threads 8 \
+ -to "$out_video_duration"
+ "$video_out"
+
+exit 0
+
+printf '\nstarting stream\n'
+
+ffmpeg -f concat -safe 0 -stream_loop -1 -i "$video_out" \
+ -f webm -cluster_size_limit 2M -cluster_time_limit 5100 -content_type video/webm \
+ -analyzeduration 2M -probesize 2M \
+ -codec copy \
+ -deadline realtime -threads 8 \
+ icecast://source:${pass}@adamsgaard.dk:3232/brtv
