building a true RNG (was: Quantum Computing ...)

[David Wagner]

Eugen Leitl  wrote:
>Is there any point in compressing the video before running it through a 
>cryptohash?

No.  (assuming you're talking about lossless compression)

In general, any invertible transformation neither adds or subtracts
entropy, and hence is extremely unlikely to make any difference to the
performance of the hash function (assuming SHA-1 is cryptographically
secure, which it is currently believed to be).  Lossless compression
is just one special kind of invertible transformation.

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