Unrecognized option 'crf'

I am trying compress video using ffmpeg but i am facing errors in the command. Although it runs perfectly fine on my linux terminal.( ffmpeg -i input.avi -vcodec libx264 -crf 24 output.avi).

my code:

void _compress() {
        if (_videoModel == null) return;
        String inputPath = _videoModel!.originalCachePath;
        String outputPath = _videoModel!.editCachePath;
    
        FFmpegKit.execute("-i $inputPath -vcodec libx264 -crf 24 -y $outputPath")
            .then((session) async {
          final returnCode = await session.getReturnCode();
          if (ReturnCode.isSuccess(returnCode)) {
            Navigator.pushNamed(context, PreviewPage.routeName,
                arguments: _videoModel);
          } else if (ReturnCode.isCancel(returnCode)) {
            print("compress cancel");
          } else {
            print("compress error : $returnCode");
            FFmpegKitConfig.enableLogCallback((log){
              final message = log.getMessage();
              print(message);
            });
    
    
          }
        });
      }

I am facing the following errors: Unrecognized option 'crf', I/flutter (31056): Error splitting the argument list, Option not found.