[FFmpeg-devel] [PATCH] mxf umid generation

[Baptiste Coudurier]

On 3/6/2009 7:44 PM, Michael Niedermayer wrote:
> On Fri, Mar 06, 2009 at 07:28:55PM -0800, Baptiste Coudurier wrote:
>> Hi,
>>
>> It seems some products really check umid and base themself on its
>> uniqueness, so it seems better to actually try to generate a unique number.
>>
>> Is the approach in the patch acceptable ? If no, 
> 
> 
> 
>> any other suggestion ?
> 
> yes, add a random_seed.c/h
> that does:
> 1. try to get a uint32 from reading /dev/(u)random
> 2. try to get a uint32 from LSB of rdtsc (and similar for ppc/bfin see 
>    libavutil/timer.h)
> 3. md5 or sha1 of the first frame or extradata
> 

Like this ?

-- 
Baptiste COUDURIER                              GnuPG Key Id: 0x5C1ABAAA
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