examples : add simple script for generating Karaoke video

examples/generate-karaoke.sh

@@ -0,0 +1,49 @@
+#!/bin/bash
+
+executable="./main"
+model="base.en"
+model_path="models/ggml-$model.bin"
+
+# require sox and ffmpeg to be installed
+if ! command -v sox &> /dev/null
+then
+    echo "sox could not be found"
+    exit 1
+fi
+
+if ! command -v ffmpeg &> /dev/null
+then
+    echo "ffmpeg could not be found"
+    exit 2
+fi
+
+if [ ! -f "$executable" ]; then
+    echo "'$executable' does not exist. Please build it first."
+    exit 3
+fi
+
+if [ ! -f "$model_path" ]; then
+    echo "'$model_path' does not exist. Please download it first."
+    exit 4
+fi
+
+# record some raw audio
+sox -d rec.wav
+
+# resample to 16kHz
+ffmpeg -y -i ./rec.wav -ar 16000 -ac 1 -c:a pcm_s16le ./rec16.wav > /dev/null 2>&1
+
+# run Whisper
+echo "Processing ..."
+./main -m models/ggml-base.en.bin rec16.wav -owts > /dev/null 2>&1
+
+# generate Karaoke video
+echo "Generating video ..."
+source rec16.wav.wts > /dev/null 2>&1
+
+# play the video
+echo "Playing ./rec16.wav.mp4 ..."
+ffplay -loglevel 0 -autoexit ./rec16.wav.mp4
+
+echo "Done"
+exit 0