im having a epipe error but the the download seems to be fine

[solcabz]

I am using FFmpeg-static in my express server to merge audio and video coming from Youtube Readable Stream then Trim. seems ok and working but im getting an error

ffmpeg video input stream error: Error: write EPIPE

ffmpeg audio input stream error: Error: write EPIPE

then the triiming process has a glitch like freeze on the first second of the video output here is my code

res.setHeader("Content-Disposition", attachment;  filename="${encodeURIComponent(info.videoDetails.title)}.mp4");

  let ffmpegArgs = [
      '-y', // Overwrite output file without asking
      '-i', 'pipe:3', // Read video stream from pipe 3
      '-i', 'pipe:4',
      '-map', '0:v',
      '-map', '1:a',
      '-c:v', 'copy',
      '-preset', 'ultrafast',
      '-b:v', '5000k',
      '-maxrate', '5000k',
      '-bufsize', '10000k',
      '-c:a', 'libmp3lame',
      '-crf', '18',
      '-preset', 'veryfast',
      '-movflags', 'frag_keyframe+empty_moov',
      '-f', 'mp4',
      '-loglevel', 'error'
  ];

  if (startTime && endTime) {
      ffmpegArgs = ffmpegArgs.concat(['-ss', startTime, '-to', endTime]); // Duration of the trimmed video
  }

  ffmpegArgs.push('-');

  let video = ytdl(url, { filter: 'videoonly', format: selectedFormat , highWaterMark: 1 << 25 })
  let audio = ytdl(url, { filter: 'audioonly', quality: 'highestaudio', highWaterMark: 1 << 25  });
  const ffmpegProcess = cp.spawn(ffmpeg, ffmpegArgs, {
      stdio: ['pipe', 'pipe', 'pipe', 'pipe', 'pipe'],
  });

  video.pipe(ffmpegProcess.stdio[3]); // Video stream to stdin (fd 3)
  audio.pipe(ffmpegProcess.stdio[4]);
      // Output the resulting merged and trimmed video to a file
      ffmpegProcess.stdio[1].pipe(res);

      // Handle the close event of the ffmpeg process
      ffmpegProcess.on('close', (code) => {
          if (code !== 0) {
            console.error(`ffmpeg process exited with code ${code}`);
          } else {
            console.log('ffmpeg process completed successfully');
            downloadedVideos.push({
              title: info.videoDetails.title,
              url: url,
              format: format
            });
          }
        });

to the trim process i tried to move the -ss and -to to different lines but the freeze issue is still there

i did try to add and error handling event but the output error is still the same error: write EPIPE but it doesn't indicate what's wrong to piping

a little help well be appreciated

// Pipe the video and audio streams to the ffmpeg process
          video.on('error', (err) => {
            console.error(`video stream error: ${err}`);
           });
            
          audio.on('error', (err) => {
            console.error(`audio stream error: ${err}`);
          });
            
          ffmpegProcess.stdio[3].on('error', (err)=> {
            console.error(`ffmpeg video input stream error: ${err} `);
          });
            
          ffmpegProcess.stdio[4].on('error', (err) => {
            console.error(`ffmpeg audio input stream error: ${err} `);
          });