> Now it seems that information has been lost here.  I cannot
> reproduce these three bytes from nothing:
> 
>       64 = profile_idc
>       00 = bit   7 = constraint_set0_flag,
>            bit   6 = constraint_set1_flag,
>            bit   5 = constraint_set2_flag,
>            bit   4 = constraint_set3_flag,
>            bit 3:0 = reserved zero bits
>       0d = level_idc

Oops, didn't notice that these bytes from the lead-in are replicated
in the sequence parameter set data.  Guess I'm not missing anything
after all.  Looking at the H.264 specification, I don't understand
why the above data is stored twice, but if it works... :-)

-- 
 Haakon
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