I’m developing a Flutter app where I need to differentiate between image and video files. However, I’ve run into a peculiar issue: my client has this video file saved from WhatsApp, and when picking it in the app, it is seen as an image instead of a video.

He sent me the file via Google Drive & Slack, and the video was a .mp4 on both of them (which was working fine when I tried myself).

However on my client’s iphone, when printing the path of the video it was ending with “.jpeg”.

Here’s my code to determinate if it’s a video or an image :

// true if image
// false if video
  // Read the first 12 bytes of the file
  final List<int> headerBytes = await file.openRead(0, 12).first;
  final String? mimeType =
      lookupMimeType(file.path, headerBytes: headerBytes);
  if (mimeType == null || !mimeType.startsWith('image/')) {
    return false;
  }
  return true;
} 

The extension should not matter, and a platform like Stack did see it as a video, so what am I doing wrong here?

Is my way of getting headerBytes correct?

I’ve tried with and without header bytes, but same result