[XviD-devel] Xvid-devel Digest, Vol 74, Issue 2

[李冰]

Hello  Everyone:
        
        I am using  xvid decore, and I am runing the  xvid_decraw.c in the downloaded xvid source package.

        My raw mpeg4 file is a 720x576 image sequence. My computer is Intel Core Duo CPU T2600 2.16G. 

        I changed the CSP and BPP to different values.


        I i set CSP = XVID_CSP_I420 ; BPP=1,  the decode speed is about  80fps.
        I i set CSP = XVID_CSP_BGR ;  BPP=3,  the decode speed is about  40fps. It seems that the decoder slow down heavily.
        I i set CSP = XVID_CSP_RGB565 ; BPP=2,  the decode speed is about  25fps. I can do nothing except decode!


        Since my VGA is only in 16bit color depth, if i can decode fast using the  XVID_CSP_RGB565 output format, I will make 

least changes with xvid.   But the speed is too slow!  

        I wanna to know: 
        1)  Is my decode speed normal?? why is the  decode process so slow?
        2)  If i wanna to display the mp4 streams on 16-bit vga, how to satisfy the need  of speed?    
        3)  If i use  I420 output mode, how to convert it to RGB565 format??

         Thanks to all!
        
                                               Ice



发件人： xvid-devel-request at xvid.org 
发送时间： 2009-03-25  19:00:10 
收件人： xvid-devel at xvid.org 
抄送： 
主题： Xvid-devel Digest, Vol 74, Issue 2 
 
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Today's Topics:
   1. Using the MMX and SSE functions on linux platform (???)
   2. Re: Using the MMX and SSE functions on linux platform
      (Michael Militzer)
----------------------------------------------------------------------
Message: 1
Date: Wed, 25 Mar 2009 09:37:01 +0800
From: ??? <konsunwin at gmail.com>
Subject: [XviD-devel] Using the MMX and SSE functions on linux
platform
To: Xvid-devel at xvid.org
Message-ID:
<7d07f8b0903241837t50808077q5f96dfb9bfcfd9bf at mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
Dear frineds:      I want to use the MMX and SSE functions of Xvid to
optimize the program,but I find them not be used using the default Xvid
configure file.
   What could I do ? My CPU can run MMX and SSE codes.
thank you!
Kongxw
------------------------------
Message: 2
Date: Wed, 25 Mar 2009 08:23:17 +0100
From: Michael Militzer <michael at xvid.org>
Subject: Re: [XviD-devel] Using the MMX and SSE functions on linux
platform
To: xvid-devel at xvid.org
Message-ID: <20090325082317.r176rbch4ok0g8cw at www.lansco.de>
Content-Type: text/plain; charset=ISO-8859-1; DelSp="Yes";
format="flowed"
Hi,
make sure you have nasm (>= 2.0) installed on your build machine.
Otherwise, configure will exclude the MMX/SSE asm code.
http://www.nasm.us/
Regards,
Michael
Quoting ??? <konsunwin at gmail.com>:
> Dear frineds:      I want to use the MMX and SSE functions of Xvid to
> optimize the program,but I find them not be used using the default Xvid
> configure file.
>    What could I do ? My CPU can run MMX and SSE codes.
>
> thank you!
>
> Kongxw
> _______________________________________________
> Xvid-devel mailing list
> Xvid-devel at xvid.org
> http://list.xvid.org/mailman/listinfo/xvid-devel
>
>
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End of Xvid-devel Digest, Vol 74, Issue 2
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