On Windows I am able to write a directshow filter and out it in the filter 
graph .  
With C++/Qt,  I can write an  QIODevice and  manually use it. 

But how do I hook the  QIODevice into the pipeline? I want to be able to 
encrypt the usual MP4 output with a cypher before it ever hits the  storage 
layer,  saving only the encrypted media on the device. (reading too.  But not 
needed to be compatible with other apps on the device) 

What I'm looking for is something like setDeciveForProtocol("aes",  
Factory<AESDevice>)  / getDeviceForUrl("aes:/some/file")  and have my QIODevice 
layered in appropriately.  (first in pipeline for read,  last for write) 

How can I do this? 

Android &  iOS.
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