first working version

convertVideo.go

@@ -0,0 +1,37 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+)
+
+func ConvertVideo(path string) {
+	out := path[:len(path)-len(filepath.Ext(path))] + ".mp4"
+
+	cmd := exec.Command("ffmpeg",
+		"-i", "input.mp4",
+		"-c:v", "libx264",
+		"-crf", "23",
+		"-preset", "medium",
+		"-c:a", "aac",
+		"-b:a", "128k",
+		out,
+	)
+
+	cmd.Stderr = cmd.Stdout
+
+	_, err := cmd.CombinedOutput()
+
+	if err != nil {
+		fmt.Printf("Error converting %s: %v\n", path, err)
+		return
+	}
+
+	if err := os.Remove(path); err != nil {
+		fmt.Printf("Converted %s -> %s, but failed to delete original: %v\n", path, out, err)
+		return
+	}
+	fmt.Printf("Converted %s -> %s (original deleted)\n", path, out)
+}