I've shown before how to generate thumbnails from ASP.NET server code using the WPF media APIs instead of GDI+ (which is unsupported when used in server code). In the previous article , I've been generating the thumbnails as PNG files. The reason for that is that PNG is a lossless format and I wanted to isolate as few variables as possible that impacted output quality and performance. Adding JPEG artifacts and the variable of the quality setting would have just muddied the water. One commenter (Victor) pointed out that the PNG API in WPF does not compress the output though. That is clearly a problem for a web application. This is why I decided to write this follow-up post. The previous one is still useful for establishing that the decision to...(read more) ...
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