Java or Dot Net for server side Flash support

We are building a F开发者_运维知识库lash application for client use but will need to do server side processing of images. All our expertise and application code is in Java, but I've been told Dot Net has better Flash support. This is general but we will be modifying large (up to 50MB) image files. The idea is that what we could do in Flash should be duplicated, automated and extended on the server side.

I've never heard before that .Net server technology has better Flash support than Java. In fact, RED5 (an open source Media server for Flash) is implemented in Java.

As for capabilities, Both .Net and Java will be more than capable of duplicate and extend the same image processing done in Flash, and both have libraries and services that support AMF in case you require it.

Flash is pretty much server-agnostic anyways, so unless you get more specific reasons I think you should go with whichever language you are more comfortable with (which seems to be Java)