Can't use -n while passing the the command

[SumitK27]

I was using -n for terminating/skipping the file if that filename already exists in ffmpeg
But when I used it in ffmpeg-bar like ffmpeg-bar -n -i input.mp4 output.mkv it's not showing the progress bar and throwing this video:0kB audio:0kB subtitle:5kB other streams:0kB global headers:0kB muxing overhead: 76.420395% and outputting the file of 48kb (irrespective to the input file size)