How to save a _flutterFFmpeg gif in firebase storage?-CodePudding

Edit: After some changes with help from @Frank van Puffelen I getting a new error see below updated code and updated error

Hello everyone im trying to save a gif which I create with flutter_ffmpeg: ^0.4.2 With this code im trying to create a gif of picked video from user which is currently widget.videopathasstring THis is the path of picked video.

 Directory gifDirectory;
  String gifOutputFile;
  getpreviewvideo() async {
    String currentvideo = widget.videopathasstring;
    await getApplicationDocumentsDirectory().then((directory) {
      print("13");
      gifDirectory = Directory(directory.path   '/gif');
      print("14");
      gifDirectory.exists().then((exists) async {
        print("0");
        if (!exists) {
          print("1");
          await gifDirectory.create();
        }
      }).then((value) => {
            print("3"),
            gifOutputFile = gifDirectory.path  
                '/'  
                DateTime.now().millisecondsSinceEpoch.toString()  
                '.gif',
          });
    });
    print("4");
    var arguments = [
      '-i',
      currentvideo,
      '-t',
      '2.5',
      '-ss',
      '2.0',
      '-f',
      'gif',
      gifOutputFile,
    ];
    _flutterFFmpeg.executeWithArguments(arguments).then((rc) {
      print("FFmpeg process exited with rc $rc");
    });

    return File(gifOutputFile);
  }

The problem is im getting this error

GTMSessionFetcher invoking fetch callbacks, data {length = 0, bytes = 0x}, error (null)
2
GTMSessionFetcher invoking fetch callbacks, data {length = 613, bytes = 0x7b0a2020 226e616d 65223a20 22616c6c ... 36316263 34220a7d }, error (null)
flutter: 13
flutter: 14
flutter: 4
flutter: Invalid argument(s) (path): Must not be null
flutter: 0
-[NSNull length]: unrecognized selector sent to instance 0x1dc5f0558
flutter: 3
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSNull length]: unrecognized selector sent to instance 0x1dc5f0558'
*** First throw call stack:
(0x181e8904c 0x19a4fdf54 0x181f66014 0x181e1e474 0x181e1d5b0 0x181e15410 0x181e0d0a0 0x100e3c4b8 0x100e3b324 0x100e3bb24 0x10065528c 0x181af9914 0x181afb660 0x181afe788 0x181b0cdd0 0x181b0d5f8 0x1f212a0b8 0x1f2129e94)
libc  abi: terminating with uncaught exception of type NSException
* thread #65, queue = 'com.apple.root.default-qos', stop reason = signal SIGABRT
    frame #0: 0x00000001b8cd0964 libsystem_kernel.dylib`__pthread_kill   8
libsystem_kernel.dylib`__pthread_kill:
->  0x1b8cd0964 < 8>:  b.lo   0x1b8cd0984               ; < 40>
    0x1b8cd0968 < 12>: pacibsp
    0x1b8cd096c < 16>: stp    x29, x30, [sp, #-0x10]!
    0x1b8cd0970 < 20>: mov    x29, sp
Target 0: (Runner) stopped.
Lost connection to device.
Exited (sigterm)

Hope anyone can help

CodePudding user response：

It seems you're not uploading the file to Cloud Storage, which only happens once you call putFile.

Have a look at the FlutterFire documentation on uploading files for an example of how to use putFile