[FFmpeg-devel] Realmedia patch

Luca Abeni lucabe72
Fri Aug 22 23:28:10 CEST 2008

Hi Ronald,

Ronald S. Bultje wrote:
>> Now, the scary thing is that "[28/03/2003:22:50:23 00:00]" is not
>> just a random time, but seems to be the only value that allows the
>> stream to work... If I change the date or the time, the stream does
>> not start.
>> I do not feel too confortable with this... Has anyone any idea on
>> what this "PlayerStarttime" is and why it has to be set to this
>> value? Ah, the joy of proprietary undocumented protocols... ;-)
> Most likely, the ClientChallenge and PlayerStarttime depend on each
> other. For example, the ClientChallenge may be a cipher of some
> combination of all required inputs (PlayerStarttime, CompanyID and
> GUID) plus some (server? client?) constants.

This is possible: after some other tests, I discovered that if I
change one of the values the stream does not play...
But google kindly provided me with another set of good values:
	"ClientChallenge: 629618d70bcb9f4c70c8a522236656ec\r\n"
	"PlayerStarttime: [20/03/2003:20:32:38 00:00]\r\n"
	"CompanyID: t4mvQZAQ7LF3Jm7mVNmwjA==\r\n"
	"GUID: 00000000-0000-0000-0000-000000000000\r\n"
Changing the values like this, the stream works again...

So, we just need to understand what's the relation between
"ClientChallenge", "PlayerStarttime", "CompanyID", and "GUID".
That is: how can we compute a valid ClientChallenge (whatever
it is) based on the other 3 values?


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