Generate a thumbnail for the first page of a PDF within a rails App?

Is there anyway to generate a thumbnail image for the first page of an uploaded PDF f开发者_Go百科ile. I want to display this image along with the description (provided by the user) of the file.

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The first answer from this question looks like it'll do what you want.

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You can use an image processing library like ImageMagick to convert a PDF into an image.

Call out to the system with something like:

system("convert -size 150x150 /path/to/uploaded/document.pdf /path/to/thumbnail/file.png")