Building XviD

[AndyP]

Apologies if this has been asked before. I have successfully managed to build xvid.dll from the sources (hurrah :D ) and was wondering what Nic/Koepi/others did differently in their builds. I did some searching and found a couple of posts that detailed some of the differences, and I have some questions......

In a post Nic said:

1) Add #ifdef __cplusplus extern "C" in image.h - I haven't done this - what does it do???
2) Get rid of fprintf(stderr in xvid.c - I can't find this. I think it was removed in the CVS. Am I correct??
3) Set TOOSMALL_LIMIT - Found in mbtransquant.c and done!
4) Set BFRAMES and BFRAMES_DEC in all project settings - BFRAMES seems to be set by default, do I need BFRAMES_DEC as well?? (and what does it do??)

In a post Koepi said:

To activate EPZS you have to comment out motion.h and uncomment the EPZS code. I can't find anything like this is motion.h?? is EPZS default now??

I have uncommented the frame.general line in codec.c. Do I need to do anything else to activate EPZS??

Finally, what other magic tricks do you do to get your (excellent) builds - if you don't mind sharing??

Sorry if this is obvious, and sorry if not relevant.

Kind Regards,
Andy :)

[sysKin]

Originally posted by AndyP
[B]4) Set BFRAMES and BFRAMES_DEC in all project settings - BFRAMES seems to be set by default, do I need BFRAMES_DEC as well?? (and what does it do??)
BFRAMES_DEC is a decoding support for B-frames - you can build without it and only decode with, say, ffdshow but there is no reason for this ;)
To activate EPZS you have to comment out motion.h and uncomment the EPZS code. I can't find anything like this is motion.h?? is EPZS default now?? There is a completely new motion estimation code. It was based on PMVfast, but if you would point out differences between PMVFast and EPZS, the new code would be closer to EPZS...

Radek

[Nic]

"Add #ifdef __cplusplus extern "C" in image.h - I haven't done this - what does it do??? "
Dont worry about that, that was from a post discussing what I have to do. That line is for my DShow filter, & is not actually needed in xvidcore (I can do it from my DShow filter, as I do now)

for dev3-api, you can just compile it after setting toosmall_limit without making changes. To add Qpel to all presets, you add the qpel refine flags to the pmv_presets in the vfw & add frame.general |= XVID_QUARTERPEL.

Hope that helps, I have compiled a stable build in ages, so I dont know whats needed to make that....

Cheers,
-Nic

[AndyP]

Hi

Many thanks for the replies. I have added the:

frame.general |= XVID_QUARTERPEL;

line to codec.c and adjusted the pmv_presets as follows:

int pmvfast_presets[7] = {
0, PMV_QUICKSTOP16, 0, 0,
0 | PMV_HALFPELREFINE16 | PMV_HALFPELDIAMOND8,
0 | PMV_HALFPELREFINE16 | PMV_HALFPELDIAMOND8 |
PMV_ADVANCEDDIAMOND16, PMV_HALFPELREFINE16 | PMV_EXTSEARCH16 |
PMV_HALFPELREFINE8 | PMV_HALFPELDIAMOND8 | PMV_USESQUARES16 |
PMV_QUARTERPELREFINE8 | PMV_QUARTERPELREFINE16
};

It seems to make a difference if the halfpel refine 8/16 is left in as well as adding the qpel refines (the resulting file is smaller) so I assume that is the way to do it. (Exactly the same size as an output from Koepi's build but binary compare different, but then you guys compile with ICL so I assume that's normal)

Thanks for pointing out about the new ME. Had my brain been in gear at the time I would have remembered that! :D

One other question. I notice in some posts that you can check-out the source using a program called cvs. I assume that this is a unix command as I can find nothing similar in WinXP. Do you know if there is a Windows equivalent??

Kind Regards,
Andy

[Nic]

Download an app called WinCVS,
I dont recommend the GUI, I use the command line program in your:
C:\Program Files\GNU\WinCvs 1.2 or similar.

then use something like:
cvs -d:pserver:anonymous@cvs.xvid.org:/xvid co -R -r dev-api-3 vfw
cvs -d:pserver:anonymous@cvs.xvid.org:/xvid co -R -r dev-api-3 xvidcore
cvs -d:pserver:anonymous@cvs.xvid.org:/xvid co -R -r dev-api-3 dshow

you may have to login using:
cvs -d:pserver:anonymous@cvs.xvid.org:/xvid login

Cheers,
-Nic

[AndyP]

Found it.

Many Thanks,
Andy