Re: Non-deterministic encoding

Set xvid_enc_frame_t->vop_flags, vol_flags, and motion all to zero, and set xvid_gbl_init_t->cpu_flags to XVID_CPU_FORCE. Still getting P-frames of differing sizes from identical images and quant values, usually starting over a hundred frames into the clip.

The machine is a single-core x86, and I've written a checksum function to ensure the input images are in fact identical each time.

The suggestions so far have been good, but no luck so far.

Regards,


mkwan

----- Original Message ----
From: Dark Sylinc <[email protected]>
To: [email protected]
Sent: Thursday, 27 December, 2007 4:48:11 PM
Subject: Re: [XviD-devel] Non-deterministic encoding

Hi,

Is XviD still non-deterministic with all optimizations
off?

Cheers
Dark Sylinc

--- "Keith R. Brafford" <[email protected]>
escribió:

> The only time I've heard of issues like this has to
> do with the floating
> point unit using 16 extra bits for accuracy which
> aren't preserved across
> context switches.  Also, don't the SSE2 extensions
> alias on the floating
> point registers?  Does that have an impact?
> 
> As a test in the off-chance that this is your
> problem (which I doubt), can
> you run a test on a relatively unloaded dual-core
> machine and set processor
> affinity to one core?  If that gives different
> results than you are seeing,
> then that should be telling.
> 
> --Keith
> _______________________________________________
> XviD-devel mailing list
> [email protected]
> http://list.xvid.org/mailman/listinfo/xvid-devel
> 



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