Anyone know of a PDF provider for ImageSharp, so I could do like /media/xyz/document.pdf?format=jpeg?

That's not really what imagesharp is for, since pdfs are a document type, not an image. To create an image from a pdf it would need to be able to read that data, and pdfs are complicated. You'll probably want to use a pdf reader to do this instead, such as PdfLibCore which has image generation as its sample usage: https://github.com/jbaarssen/PdfLibCore

Thanks - what I want is to be able to create a thumbnail of the first page in the pdf. I've actually been able to create a new decoder for ImageSharp that does this. Now I just need to get Umbraco working with it 🙂

Nice! Please share the code/snippet once you've got it working, I'd love to see it

will do 🙂

I think @AaronSadlerUK has worked on a package that does that https://github.com/Moriyama-Umbraco/Moriyama.PreviewPDF

Nuget package coming 🙂 https://github.com/skttl/ImageSharpCommunity.Formats.Pdf

We write our own component that creates PDF thumbnails, but we opted to create them when the PDF is uploaded in the media section, so it’s a one of conversion. We used PDFPIG for the image generation which seems to work well.

Thanks so much @skttl for this! I've been all over the place trying to sort x-plat PDF rendering and ended up overengineering something wild. This has set me in the right direction. For anyone wanting to solve this problem without an ImageSharp dependency I can recommend https://github.com/sungaila/PDFtoImage which also uses PDFium for rendering but SkiaSharp for processing.