update thumb generator script

packages/scripts/thumbnail-generator.sh

@@ -1,17 +1,20 @@
-#!/bin/sh
+#!/bin/bash
 
 input_file_path=$1
 
-# Get the number of frames, fallback to 100 if missing
-nb_frames=$(ffprobe -v error -select_streams v:0 -show_entries stream=nb_frames -of default=noprint_wrappers=1:nokey=1 "$input_file_path")
-
-# Fallback if nb_frames is empty or "N/A"
-if [ -z "$nb_frames" ] || [ "$nb_frames" = "N/A" ]; then
-  echo "nb_frames was ${nb_frames} which is unsupported. Are you trying this on a .ts file? (It may not work on ts, try mp4.) Exiting."
-  exit 555
-fi
-
-sep=$((nb_frames/25))
-
-# Generate a 5x5 tile thumbnail
-ffmpeg -i "$input_file_path" -vf "select=not(mod(n\,max(1\,$sep))),scale=160:-1,tile=5x5" -vsync 0 -update 1 -frames:v 1 "${input_file_path%.*}-thumb.png"
+vcsi "${input_file_path}" \
+  --metadata-position hidden \
+  --metadata-margin 0 \
+  --metadata-horizontal-margin 0 \
+  --metadata-vertical-margin 0 \
+  --grid-spacing 0 \
+  --grid-horizontal-spacing 0 \
+  --grid-vertical-spacing 0 \
+  --timestamp-horizontal-margin 0 \
+  --timestamp-vertical-margin 0 \
+  --timestamp-horizontal-padding 0 \
+  --timestamp-vertical-padding 0 \
+  -w 830 \
+  -g 5x5 \
+  -o "${input_file_path%.*}-thumb.png"
+