[FFmpeg-soc] [soc]: r532 - matroska/matroskaenc.c

[Kostya]

On Sat, Jul 28, 2007 at 09:10:15PM +0200, Michael Niedermayer wrote:
> On Sat, Jul 28, 2007 at 09:03:42PM +0300, Kostya wrote:
> > On Sat, Jul 28, 2007 at 07:09:44PM +0200, Michael Niedermayer wrote:
> > > Hi
> > > 
> > > On Sat, Jul 28, 2007 at 05:43:03PM +0300, Kostya wrote:
> > > > On Sat, Jul 28, 2007 at 02:16:23PM +0200, Michael Niedermayer wrote:
> > > > > Hi
> > > > [...]
> > > > > 
> > > > > ... as i said getting a good and secure random number is not easy, you 
> > > > > cannot use anything that could be usefull for an expoit or anything that
> > > > > could by used to identify time or place where encoding happened,
> > > > > not the current time, no pointers, ...
> > > > > you are left with the video/audio you are going to encode, and some stuff
> > > > > we cant easily use like the least significant bits of the time of some
> > > > > interrupts
> > > > 
> > > > What about this?
> > > > http://en.wikipedia.org/wiki/UUID
> > > 
> > > which version of UUIDs?
> > > you have 3 choices
> > > 1/2 contains the MAC address (this is the most stupid idea so far not to
> > >     mention the issue of how to find the MAC address in a portable way)
> > 
> > That depends on what UUID is used - IIRC this one can be decoded.
> 
> ?

There is a standard way to obtain information used for generating from this UUID
so this is good for verifying something but not as a random ID.

[...] 
> 
> -- 
> Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB