ultimate slideshow script fixHEADmaster

1 files changed, 48 insertions, 13 deletions

diff --git a/video/slideshow b/video/slideshow
index 4cd1f61..0d46038 100755
--- a/video/slideshow
+++ b/video/slideshow
@@ -1,15 +1,50 @@
 #!/bin/sh
-cat "$@" | ffmpeg -y \
-	-framerate 0.20 -loop 1 \
-	-f image2pipe \
+# settings
+ms_per_frame=5000
+resolution=1920x1080
+output=output.mkv
+
+# dependency check
+! command -v ffmpeg > /dev/null && echo "Missing dependency: ffmpeg" && exit 1
+! command -v magick > /dev/null && echo "Missing dependency: magick" && exit 1
+
+# calc runtime (for fun)
+intdiv() { echo $(($1 / $2)).$((($1 % $2) * 1000 / $2)); }  # calc decimal using integer arithmetic
+hms_from_ms() { printf '%02d:%02d:%02d' $(($1 / 3600000)) $((($1 % 3600000) / 60000)) $((($1 % 60000) / 1000)); }
+ctime() { t=$(date +%s) && echo $(( t * 1000 )); }
+framerate=$(intdiv 1000 $ms_per_frame)
+runtime=$(hms_from_ms $((ms_per_frame * $#)))
+
+echo "Creating a slideshow ($output) consisting of $# images at $(intdiv $ms_per_frame 1000) seconds per frame for a total runtime of approximately $runtime"
+count=0
+stime=$(ctime)
+
+# slideshow
+for img in "$@"; do
+	count=$((count + 1))
+	etime=$(ctime)
+	elapsed=$(hms_from_ms $(( etime - stime )))
+	printf '[%0*d/%d] (elapsed %s) %s\n' ${##} $count $# $elapsed "$img" >&2
+
+	magick "$img" \
+		-auto-orient \
+		-resize $resolution \
+		-background black \
+		-gravity center \
+		-extent $resolution \
+		-depth 8 \
+		rgb:-
+done | ffmpeg -y -v error \
+	-f rawvideo \
+	-video_size $resolution \
+	-pixel_format rgb24 \
+	-framerate $framerate \
+	-probesize 32 \
+	-analyzeduration 0 \
 	-i - \
-	-c:v libx264 -quality quality -tune stillimage \
-	-qmin 12 -qmax 28 -qdiff 16 \
-	-vf \
-	fps=1,\
-	framerate=25:\
-	interp_start=0:\
-	interp_end=255:\
-	scene=100 \
-	-metadata "title"="$(pwd | sed "s/.*\///")" \
-	output.mkv
+	-vf "fps=1,framerate=30:interp_start=0:interp_end=255:scene=100" \
+	-c:v libx264 \
+	-crf 22 \
+	-preset ultrafast \
+	-tune stillimage \
+	$output