v.dart

  Future getVideo() async {
    setState(() {
      video = null;
      thumbfilepath = null;
    });
    setState(() {
      messageid = DateTime.now().millisecondsSinceEpoch.toString();
    });
    var vinput = await ImagePicker.pickVideo(source: ImageSource.gallery);
    final uint8list = await VideoThumbnail.thumbnailFile(
      video: vinput.path,
      imageFormat: ImageFormat.JPEG,
      maxWidth:
          500, // specify the width of the thumbnail, let the height auto-scaled to keep the source aspect ratio
      quality: 25,
    );
    print(uint8list);
    setState(() {
      mdeiafilesize = filesize(vinput.lengthSync());
      video = vinput;
      thumbfilepath = uint8list;
    });
    uploadVideo();
  }