[XviD-devel] Bframe bugfixes
Christoph Lampert
xvid-devel@xvid.org
Mon, 22 Jul 2002 10:45:22 +0200 (CEST)
On Mon, 22 Jul 2002, Edouard Gomez wrote:
> I've tested your bugfixes and the same MB problem occurs.
>
> This time i've made a snapshot :
>
> http://perso.wanadoo.fr/ed.gomez/files/xinesnap-20020722-094140-1.png
>
> You can see the wrong MBs at the bottom of the black 'O' letter.
Did you try without adaptive quantization? I didn't test with it.
I don't know if this has any influence (from my point, it shouldn't), but
it's worth a try.
If it's still there, try to lower the value "DIRECT_UPPERLIMIT" in
xvidcore/src/motion/motion_est.c
First to 0 (then it _must_ disappear, because direct mode is off),
then to some other value. I really thought 256 would be okay, but
maybe you proved me wrong.
The influence is not big, anyway. Simply leave it to 0 and you should not
have too big problems. I'll add residue encoding to direct mode as soon as
possible, then these problems should be history.
gruel
>
> Using these settings :
>
> [export_xvidcvs.so] multi-pass session: 0
> [export_xvidcvs.so] quality: 0
> [export_xvidcvs.so] bitrate [kBits/s]: 710
> [export_xvidcvs.so] max keyframe interval: 250
> [export_xvidcvs.so] max bframe sequence: 1
> [export_xvidcvs.so] bframe quant ratio: 140
> [export_xvidcvs.so] motion flags:
> PMV_HALFPELREFINE16
> PMV_EXTSEARCH16
> PMV_EARLYSTOP16
> PMV_HALFPELREFINE8
> PMV_EARLYSTOP8
> [export_xvidcvs.so] global flags:
> XVID_GLOBAL_DX50BVOP
> [export_xvidcvs.so] general flags:
> XVID_H263QUANT
> XVID_HALFPEL
> XVID_ADAPTIVEQUANT
> XVID_LUMIMASKING
> XVID_INTER4V
> [export_xvidcvs.so] cpu flags:
> XVID_CPU_MMX
> XVID_CPU_MMXEXT
> XVID_CPU_SSE
> XVID_CPU_TSC
> [export_xvidcvs.so] frame rate: 25.00
> [export_xvidcvs.so] color space: YV12
>
>
> --
> Edouard Gomez
> _______________________________________________
> XviD-devel mailing list
> XviD-devel@xvid.org
> http://list.xvid.org/mailman/listinfo/xvid-devel
>
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