Null check operator used on a null value

[HenrikVL]

Unhandled Exception: Null check operator used on a null value

I am encountering an error when trying to compress videos. I am testing the app on an Iphone 12 pro.

I have tried using the following versions of the package:

• 3.1.1
• 3.1.0
• 3.0.0

My system:

• Computer: Macbook pro m1 13 (Monterey 12.4)
• Phone for testing: Iphone 12 pro (15.5)
• IDE: Visual Studio Code
• Flutter version: 3.0.3

My code:

print("before compression");

final info = await VideoCompress.compressVideo(
  widget.filePath,
  quality: VideoQuality.MediumQuality,
  deleteOrigin: false,
  includeAudio: false,
);

print("after compression");

setState(() {
  compressedInfo = info!.path!; // Dart complains if I don't run a null-check here
  print("info set");
});

Error:

The selected imageFormatGroup is not supported by iOS. Defaulting to brga8888
flutter: before compression
flutter: VideoCompress: You can try to subscribe to the
flutter:       compressProgress$ stream to know the compressing state.
[VERBOSE-2:ui_dart_state.cc(198)] Unhandled Exception: Null check operator used on a null value
#0      new MediaInfo.fromJson (package:video_compress/src/media/media_info.dart:43:21)
#1      Compress.compressVideo (package:video_compress/src/video_compress/video_compressor.dart:154:24)
<asynchronous suspension>
#2      _VideoPageState.build.<anonymous closure> (package:apiir_bikefit/pages/record/video_page.dart:65:28)
<asynchronous suspension>

I first assumed that there was something wrong with the way I was handling the result of the compression (info) or that I had implemented the async await wrong. However, after trying different methods and researching online I can't seem to find the problem.

Additionally, it seems that print("after compression"); is never reached, indicating that there is something wrong with the compression function (though I'm not 100% sure).

Could this be a bug in the package?

[swapnilsinha17]

@HenrikVL @jonataslaw i also have same issue

File ----/Users/elintminds/Library/Developer/CoreSimulator/Devices/BFEABB05-67D9-4531-A1E9-6760376F5F45/data/Containers/Data/Application/6A224A37-9E94-443A-AB3B-6234DA384DE2/tmp/1 Minute Timer.mp4

flutter: VideoCompress: You can try to subscribe to the flutter: compressProgress$ stream to know the compressing state. [VERBOSE-2:ui_dart_state.cc(209)] Unhandled Exception: Null check operator used on a null value #0 new MediaInfo.fromJson (package:video_compress/src/media/media_info.dart:43:21) #1 Compress.compressVideo (package:video_compress/src/video_compress/video_compressor.dart:157:24) <asynchronous suspension>

[khamidjon-khamidov]

I also have the same issue. I found out that it is happening when I set include_audio to false.

[caleb654]

Also having this issue. Can confirm what @SomeoneAndNoone said as well.

[eegets]

video_compress Verison:

• video_compress: ^3.1.1

My System:

• MacBook Pro (13-inch, 2020, Four Thunderbolt 3 ports)

Flutter code:

...
  if (Platform.isMacOS) {

      print("MacOs");

      final info = await VideoCompress.getMediaInfo("/Users/wangkai/Downloads/shijiannihao.mkv");
      final thumbnail = await VideoCompress.getFileThumbnail("/Users/wangkai/Downloads/shijiannihao.mkv");  //getFileThumbnail no working
      print("Print: info:$info");
      print("thumbnail: $thumbnail");
    }
...

Log Print:

flutter: MacOs
[ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: Null check operator used on a null value
#0      new MediaInfo.fromJson (package:video_compress/src/media/media_info.dart:43:21)
#1      Compress.getMediaInfo (package:video_compress/src/video_compress/video_compressor.dart:104:22)
<asynchronous suspension>
#2      _MyAppState.getVideoInfo (package:happy_sing/main.dart:51:20)
<asynchronous suspension>

I have two questions

• 1: There is no callback after the VideoCompress.getFileThumbnail() method is executed
• 2: VideoCompress.getMediaInfo() returned Null check operator used on a null value error

However, the above two methods can return normally and get the value when executed on an Android phone

[sharadgoregore]

I also have the same issue. I found out that it is happening when I set include_audio to false.

Thanks man..it worked for me

[JoergPf]

Same here, is there a solution besides setting include_audio to false?

[marinaaraujo97]

Probably related to #203

[meridorkobi]

I have the same exception
using ^3.1.2

` static Future<MediaInfo?> compressVideo(File file) async {

MediaInfo? mediainfo;

try {

  await VideoCompress.setLogLevel(0);

  mediainfo = await VideoCompress.compressVideo(file.path,

      quality: VideoQuality.MediumQuality,

      includeAudio: false,

      deleteOrigin: false

  );

  return mediainfo;

} catch (e) {

  VideoCompress.cancelCompression(); //If any error occurs during compression, the process is stopped.

}

return null;

}
`

This is the log-
V/MediaMetadataRetriever( 9817): constructor V/NuMediaExtractor( 9817): NuMediaExtractor constructor E/MediaMetadataRetriever( 9817): setDataSource - FileNotFoundException E/MethodChannel#video_compress( 9817): Failed to handle method call E/MethodChannel#video_compress( 9817): java.lang.IllegalArgumentException E/MethodChannel#video_compress( 9817): at android.media.MediaMetadataRetriever.setDataSource(MediaMetadataRetriever.java:184) E/MethodChannel#video_compress( 9817): at com.otaliastudios.transcoder.source.UriDataSource.applyRetriever(UriDataSource.java:33) E/MethodChannel#video_compress( 9817): at com.otaliastudios.transcoder.source.DefaultDataSource.ensureMetadata(DefaultDataSource.java:41) E/MethodChannel#video_compress( 9817): at com.otaliastudios.transcoder.source.DefaultDataSource.getDurationUs(DefaultDataSource.java:165) E/MethodChannel#video_compress( 9817): at com.otaliastudios.transcoder.source.TrimDataSource.<init>(TrimDataSource.java:31) E/MethodChannel#video_compress( 9817): at com.example.video_compress.VideoCompressPlugin.onMethodCall(VideoCompressPlugin.kt:143) E/MethodChannel#video_compress( 9817): at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:262) E/MethodChannel#video_compress( 9817): at io.flutter.embedding.engine.dart.DartMessenger.invokeHandler(DartMessenger.java:295) E/MethodChannel#video_compress( 9817): at io.flutter.embedding.engine.dart.DartMessenger.lambda$dispatchMessageToQueue$0$io-flutter-embedding-engine-dart-DartMessenger(DartMessenger.java:319) E/MethodChannel#video_compress( 9817): at io.flutter.embedding.engine.dart.DartMessenger$$ExternalSyntheticLambda0.run(Unknown Source:12) E/MethodChannel#video_compress( 9817): at android.os.Handler.handleCallback(Handler.java:883) E/MethodChannel#video_compress( 9817): at android.os.Handler.dispatchMessage(Handler.java:100) E/MethodChannel#video_compress( 9817): at android.os.Looper.loop(Looper.java:237) E/MethodChannel#video_compress( 9817): at android.app.ActivityThread.main(ActivityThread.java:8167) E/MethodChannel#video_compress( 9817): at java.lang.reflect.Method.invoke(Native Method) E/MethodChannel#video_compress( 9817): at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:496) E/MethodChannel#video_compress( 9817): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1100)