'How to export multi photos as a video in flutter?

how I can make a video By merging several photos? I only found this package ffmpeg_kit_flutter and used it as follows But I'm having a problem 1- In merging several photos 2- Put a duration between them

01.jpg,02.jpg,03.jpg,04.jpg


Future<void> VideoMerger() async {
    loading = true;
    notifyListeners();
    if(await Permission.storage.request().isGranted){
      String commandToExecute ='-r 15 -f mp3 -i /storage/emulated/0/Download/khh.mp3 -f image2 -i /storage/emulated/0/Download/01.jpg -y /storage/emulated/0/Download/output.mp4';
      await FFmpegKit.executeAsync(commandToExecute).then((rc) {
        loading = false;
        notifyListeners();
        print('FFmpeg process exited with rc: $rc');
      });
    }else if (await Permission.storage.isPermanentlyDenied){
      loading = false;
      notifyListeners();
      openAppSettings();
    }
}

Solution 1:^[1]

I have just found that I can test the class of an object with inherits, as in

assert_engine(inherits( 1.5),"numeric"))

but I'd still like to know why I can't use class.

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Solution 1	JeremyC

'How to export multi photos as a video in flutter?

Solution 1:[1]

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Solution 1:^[1]