The video is not loading and not merging

**Describe the bug**
The video is not loading and not merging, I'm trying to merge audio to a video using ffmpeg Can anyone please help me to do that using this package? uinsg react + vite

**To Reproduce**
npm run dev
```

import { useState, useRef } from "react";
import { FFmpeg } from "@ffmpeg/ffmpeg";
import { toBlobURL, fetchFile } from "@ffmpeg/util";

function App() {
const [loaded, setLoaded] = useState(false);
const ffmpegRef = useRef(new FFmpeg());
const videoRef = useRef(null);
const messageRef = useRef(null);

const load = async () => {
const baseURL = "https://unpkg.com/@ffmpeg/core-mt@0.12.2/dist/esm";
const ffmpeg = ffmpegRef.current;
ffmpeg.on("log", ({ message }) => {
if (messageRef.current) messageRef.current.innerHTML = message;
});
// Load FFmpeg
await ffmpeg.load({
coreURL: await toBlobURL(`${baseURL}/ffmpeg-core.js`, "text/javascript"),
wasmURL: await toBlobURL(
`${baseURL}/ffmpeg-core.wasm`,
"application/wasm"
),
workerURL: await toBlobURL(
`${baseURL}/ffmpeg-core.worker.js`,
"text/javascript"
),
});
setLoaded(true);
};

const transcode = async () => {
const videoURL1 = "https://storage.googleapis.com/gtv-videos-bucket/sample/BigBuckBunny.mp4"; // Replace with your video URLs
const videoURL2 = "https://storage.googleapis.com/gtv-videos-bucket/sample/BigBuckBunny.mp4"; // Replace with your video URLs
const ffmpeg = ffmpegRef.current;

// Write the input videos to temporary files
await ffmpeg.writeFile("input1.webm", await fetchFile(videoURL1));
await ffmpeg.writeFile("input2.webm", await fetchFile(videoURL2));

// Interlace (blend) the two videos using the filter_complex option
await ffmpeg.exec([
"-i", "input1.webm",
"-i", "input2.webm",
"-filter_complex",
"[0:v][1:v]blend=all_expr='A*(if(eq(0,N/2),1,T))+B*(if(eq(0,N/2),T,1))'",
"output.mp4",
]);

// Read the resulting MP4 file and display it
const fileData = await ffmpeg.readFile('output.mp4');
const data = new Uint8Array(fileData as ArrayBuffer);
if (videoRef.current) {
videoRef.current.src = URL.createObjectURL(
new Blob([data.buffer], { type: 'video/mp4' })
)
}
};

return loaded ? (
<>



Interlace and Save as MP4

) : (
Load ffmpeg-core
);
}

export default App;

```
**Expected behavior**
It should merge the audio with the video

**Desktop (please complete the following information):**
- OS: macOS
- Browser chrome
- Version 116.0.5845.110