Set thumbnail size

[arc95]

Hi. Thanks for this great library. I need to get a 700px X 480px thumbnail from a video. Here's my code:

var outputFile = new MediaFile{Filename = outputPath};

using (var engine = new Engine())
{
	engine.GetMetadata(inputFile);
	engine.ConversionCompleteEvent += (o, e) =>
	{
		// Code to handle completion.
	};

	var options = new ConversionOptions { Seek = TimeSpan.FromSeconds(1), 
              CustomWidth = 700, CustomHeight = 480};
	engine.GetThumbnail(inputFile, outputFile, options);
}

This produces a snapshot but it's 352x240 (the size of the video. How do you set the thumbnail size? Thanks.

[ahmad-rzk]

I faced the same issue here, after looking around in the code I found out that customWidth/Height properties where intended to be used with videos only when its size set to custom.

I created a PR #114 to use these properties for the thumbnail size as well.