Failed to write data to File

[FilledStacks]

I have been trying to debug this issue but I can't figure out why it's happening. The library has been failing to load thumbnails for some videos recorded on iOS. This is one of the videos and you'll see that the video works just fine.

If I retry to load it 5 times then it shows up 3 out of 5 times. I'm using the suggested code for this.

  _videoThumbnails[videoFileUrl] = await VideoThumbnail.thumbnailFile(
                  video: element.url,
                  thumbnailPath: (await getTemporaryDirectory()).path,
                ) ??
                '';

I've tried using a Fork mentioned in #94 but it doesn't work. Is there any way to get a clearer message of why this is happening. I'm running on iOS 15 and also on ipadOS 14.6.

Flutter Doctor

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[ahmadvicky]

I got error in iOS

[VERBOSE-2:ui_dart_state.cc(198)] Unhandled Exception: PlatformException(IO Error, Failed to write data to file, null, null)

0 StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:607:7)

1 MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:167:18)

#2 VideoThumbnail.thumbnailFile (package:video_thumbnail/video_thumbnail.dart:48:12)

[justsoft]

Please try the thumbnailData function first to detect what is causing this problem, if video source causes the issue or the writing data on device.

[ahmadvicky]

I already resolve it,

I mixed the function with the video player.

you can try this

VideoPlayerController videoPlayerController;

prepare(){ videoPlayerController = VideoPlayerController.file(valuepath); File file = File(valuepath); generateThumbnail(file, file.path); }

generateThumbnail(File video, String fileAnother) async { final String _videoPath = video.path;

double _eachPart = _videoDuration / _numberOfThumbnails;

List<Uint8List> _byteList = [];
// the cache of last thumbnail
Uint8List _lastBytes;

for (int i = 1; i <= _numberOfThumbnails; i++) {
  Uint8List _bytes;
  _bytes = await VideoThumbnail.thumbnailData(
    video: _videoPath,
    imageFormat: ImageFormat.JPEG,
    timeMs: (_eachPart * i).toInt(),
    quality: 75,
  );

  // if current thumbnail is null use the last thumbnail
  if (_bytes != null) {
    _lastBytes = _bytes;
    _byteList.add(_bytes);
  } else {
    // _bytes = _lastBytes;
    // _byteList.add(_bytes);
  }
}

// print("_bytes=== ${_lastBytes}");

if (_byteList.length > 0) {
  final tempDir = await getTemporaryDirectory();
  await File(
          '${tempDir.path}${DateTime.now().toString()}-${DateTime.now().microsecondsSinceEpoch}.png')
      .create()
      .then((value2) {
    value2.writeAsBytesSync(_byteList.first);

    videoFile.add(ImageFileUploadCommunity(
        file: video,
        fileAnother: fileAnother,
        fileThumbnail: value2,
        urlThumbnail: ""));

    setState(() {

      videoPlayerController.dispose();

      setState(() {

      });
    });
  });
}

}

[justsoft]

Thanks for the work around. The URL must be properly encoded, also the writing file path must be valid.