[XviD-devel] Non-deterministic encoding

Matthew Kwan matt_kwan at yahoo.com.au
Fri Dec 28 11:19:41 CET 2007


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 <dark_sylinc at yahoo.com.ar>
To: xvid-devel at xvid.org
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" <keith.brafford at gmail.com>
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
> XviD-devel at xvid.org
> http://list.xvid.org/mailman/listinfo/xvid-devel
> 



      Yahoo! Encuentros.

Ahora encontrar pareja es mucho más fácil, probá el nuevo Yahoo!
 Encuentros http://yahoo.cupidovirtual.com/servlet/NewRegistration
_______________________________________________
XviD-devel mailing list
XviD-devel at xvid.org
http://list.xvid.org/mailman/listinfo/xvid-devel





      ___________________________________________________________
Support the World Aids Awareness campaign this month with Yahoo! For Good http://uk.promotions.yahoo.com/forgood/


More information about the XviD-devel mailing list