Xvid and 64 bits

[binome]

Hi,
I want to compress a video with Xvid-64bit-codec and Virtualdub64. I'm on Windows Vista 64.
I've installed sourceforge Virtualdub64 and Koepi's -'bit Xvid codec, but when I want to choose the xvid codec, virtualdub doesn't permit that, it's not in the list of available codecs.
If someone could tell me what to do...

Thx

[binome]

Nobody knows how to do that ?

[jel]

hi binome and welcome to the forum!

i will move your thread to the xvid forum where hopefully on eof the gurus there can help you out.

good luck
j

[celtic_druid]

Koepi's build is 32bit. If you want to use it then you need to use a 32bit VDub build. For VDub 64bit, you need to install a 64bit Xvid codec. My 64bit installer installs both. 100% not tested under Vista though. Works fine under XP x64. A little out of date, but still possibly newer than Koepi's last 1.2 build.

[binome]

Thank you I've installed it and everything's fine.
But I have a question : as the computing wordsize is twice bigger I had expected the process to be twice shorter on a 64-bit system than on a 32-bit one. But it's not, the number of fps is the same. Can you explain it ?

[squid_80]

But I have a question : as the computing wordsize is twice bigger I had expected the process to be twice shorter on a 64-bit system than on a 32-bit one. But it's not, the number of fps is the same. Can you explain it ?
Double the word size does not equal double performance. If you put more wheels on a car it's not going to go faster.
A standard integer in a 64-bit system is still 32-bits. XMM and MMX registers are still 128 and 64 bits respectively. The only real advantage of 64-bit mode is 8 more general purpose registers and 8 more XMM registers (which aren't used by xvid). Disadvantages include longer instructions and greater restrictions on which XMM registers are non-volatile.

[celtic_druid]

Hmm, I recall the 64bit build being faster, but that was under XP and I could be wrong. It was awhile ago.

What was your source though?

[binome]

Thank you squid_80, it's a clear explanation and I think I understand.

[BlumiTheRipper]

i think 64-bit would not take much effect on the speed...

:rolleyes:
i've got a athlon 4000+ 64bit and i tried win xp 64edition and i just can advise everyone to never install this OS. It's horrible and you've got no preshares... it's just marketing...
i use win xp 32bit and linux 64bit but i just use the 64bit edition of linux because linux supports the 64bit correct and yoou got sometimes preshares... but windows is far away of a good 64bit support

i hope this'll help you...

[squid_80]

What are preshares and why are they good?