diff --git a/main.go b/main.go
index fd0d3ee..4731027 100644
--- a/main.go
+++ b/main.go
@@ -7,9 +7,9 @@ import (
 	"fmt"
 	"io"
 	"net/http"
-	"path/filepath"
 	"os"
 	"os/exec"
+	"path/filepath"
 	"regexp"
 	"strconv"
 	"strings"
@@ -83,14 +83,24 @@ func main() {
 
 	// Falls nicht bereits .mp4 als Endung existiert
 	if ext != ".mp4" {
-    	mp4Out = strings.TrimSuffix(outputPath, ext) + ".mp4"
+		mp4Out = strings.TrimSuffix(outputPath, ext) + ".mp4"
 	}
 
-	if err := exec.Command("ffmpeg", "-y", "-i", outputPath, "-c", "copy", mp4Out).Run(); err != nil {
+	if err := exec.Command(
+		"ffmpeg",
+		"-y",
+		"-i", outputPath,
+		"-c:v", "copy",
+		"-c:a", "copy",
+		"-bsf:a", "aac_adtstoasc",
+		"-movflags", "+faststart",
+		mp4Out,
+	).Run(); err != nil {
 		fmt.Println("⚠️ Fehler bei Umwandlung in MP4:", err)
 	} else {
-		fmt.Println("✅ Umwandlung abgeschlossen:", mp4Out)
+		fmt.Println("✅ Umwandlung abgeschlossen (web-optimiert):", mp4Out)
 	}
+
 }
 
 // --- helper ---
diff --git a/recorder.exe b/recorder.exe
index 4773972..8619536 100644
Binary files a/recorder.exe and b/recorder.exe differ