[Dev] Streaming server - experience?

[Matej Durco]

Dear colleagues,

one of our partners within CLARIN-AT is planning to setup an audio 
streaming server
with an important aspect being the ability to control the access to the 
resource.
(i.e. allow streaming, but prevent downloading (or at least make it more 
difficult))

I guess this is not quite in line with the overall Open Access strategy 
of CLARIN,
but, well, we discussed this often enough, there are resources you dont 
want to
or even may not spread without control.

So I thought, I'd tap the "community knowledge"
hoping somebody has some experience or even a solution for this
(preferably non-commercial).

Thank you in advance  for any ideas, hints, comments.

Best,
Matej