megui with x.264 64bit

daWsOn_s · 20th July 2009, 01:29

Hello,
is it possible to use megui 32bit with x264 64bit? I read that it could improve enconding speed and i'd like to try. I installed avisynth x64 with x64 plugins but enconding won't start.
There's a post here with a x64 megui build but the link doesn't work.

Any help and experiences?

Thanks

Rain724 · 23rd July 2009, 00:22

I'm having the same problem. It looks like MeGUI can't launch the 64bit x264 process to start the encoding... Any help/information about this would be greatly appropriated.

Kurtnoise · 24th July 2009, 09:48

to use this correctly (megui 32bits & x264 64bits), we need to tweak the encoding pattern used (i.e add avs2yuv in the chain)...

Otherwise, that would be to compile megui and all its components as 64bits. However, as far I can tell, an internal component is not compatible with this. So, it requires some rewrite code.

The best way at the current time, it's to use all 32bits apps/tools in your favorite 64bits OS..

alwa · 24th July 2009, 11:05

If you use 32-bit Avisynth you could be interested in this (basically an extraction of the AVIS-input of x264). The program redirects the all command line parameters and pipes the video to the 64-bit executable of x264. Just place the x264_x64_wrapper.exe and the x264_x64.exe (any 64-bit executable of x264 named like that will do the trick) in the same folder. Then reference megui to the x264_x64_wrapper.exe.

benwaggoner · 26th July 2009, 02:49

Interesting.

Has anyone found a combination where the "thunking" overhead (or whatever you call it) is small enough that the perf adavantage of 64-bit still makes it worth the trouble?

twist3d · 26th July 2009, 08:16

Quote:

Originally Posted by benwaggoner

Interesting.

Has anyone found a combination where the "thunking" overhead (or whatever you call it) is small enough that the perf adavantage of 64-bit still makes it worth the trouble?

lots of benchmark results (including mine) at http://forum.doom9.org/showthread.php?t=144140.
I think when we get fully chained 64-bit encoding process, the speed increase will be more noticeable.

daWsOn_s · 29th July 2009, 20:52

Quote:

Originally Posted by alwa

If you use 32-bit Avisynth you could be interested in this (basically an extraction of the AVIS-input of x264). The program redirects the all command line parameters and pipes the video to the 64-bit executable of x264. Just place the x264_x64_wrapper.exe and the x264_x64.exe (any 64-bit executable of x264 named like that will do the trick) in the same folder. Then reference megui to the x264_x64_wrapper.exe.

It works, but the speed is the same

x64 versione is a little bit slower too

turbojet · 1st August 2009, 08:47

Thanks for the wrapper aiwa. It's about 5% faster then comparable x86 builds for me on an X2 3800 and Q6600 both Windows 7 RC. It's not quite as much of a gain as I see with pipebuf + avs2yuv which is around 10% but I'll take any speedup at same quality. Could it be number of buffers used?

alwa · 1st August 2009, 15:27

Quote:

Originally Posted by daWsOn_s

It works, but the speed is the same

x64 versione is a little bit slower too

It happens for some encodes. You can see this behaviour also in some the benchmarks of: http://forum.doom9.org/showthread.php?t=148431
But with the slow preset i got always reasonable better results.

Quote:

Originally Posted by turbojet

Thanks for the wrapper aiwa. It's about 5% faster then comparable x86 builds for me on an X2 3800 and Q6600 both Windows 7 RC. It's not quite as much of a gain as I see with pipebuf + avs2yuv which is around 10% but I'll take any speedup at same quality. Could it be number of buffers used?

The buffer is not adjustable (yet). Mainly because i doubt there would be a big improvement since no "always good" buffersize has been discovered yet. That it is overall slower than the pipebuf & avs2yuv chain is weird. What buffer values do you to get the 5% better results with pipebuf & avs2yuv

turbojet · 4th August 2009, 04:36

Depending on settings/cpu 2 and 4 MB buffers were the fastest, sometimes considerably faster (5+%) than the other buffer sizes.

Maybe 3 MB buffer would be optimal? it hasn't been tested yet.

20th July 2009, 01:29	#1 \| Link
daWsOn_s Sandro Join Date: Nov 2006 Location: Pescara, Italy Posts: 168	megui with x.264 64bit Hello, is it possible to use megui 32bit with x264 64bit? I read that it could improve enconding speed and i'd like to try. I installed avisynth x64 with x64 plugins but enconding won't start. There's a post here with a x64 megui build but the link doesn't work. Any help and experiences? Thanks

26th July 2009, 02:49	#5 \| Link
benwaggoner Moderator Join Date: Jan 2006 Location: Portland, OR Posts: 5,168	Interesting. Has anyone found a combination where the "thunking" overhead (or whatever you call it) is small enough that the perf adavantage of 64-bit still makes it worth the trouble? __________________ Ben Waggoner Principal Video Specialist, Amazon Prime Video My Compression Book

23rd July 2009, 00:22	#2 \| Link
Rain724 Registered User Join Date: Jul 2009 Posts: 1	I'm having the same problem. It looks like MeGUI can't launch the 64bit x264 process to start the encoding... Any help/information about this would be greatly appropriated.

24th July 2009, 09:48	#3 \| Link
Kurtnoise Swallowed in the Sea Join Date: Oct 2002 Location: Aix-en-Provence, France Posts: 5,191	to use this correctly (megui 32bits & x264 64bits), we need to tweak the encoding pattern used (i.e add avs2yuv in the chain)... Otherwise, that would be to compile megui and all its components as 64bits. However, as far I can tell, an internal component is not compatible with this. So, it requires some rewrite code. The best way at the current time, it's to use all 32bits apps/tools in your favorite 64bits OS..

24th July 2009, 11:05	#4 \| Link
alwa Registered User Join Date: May 2006 Posts: 29	If you use 32-bit Avisynth you could be interested in this (basically an extraction of the AVIS-input of x264). The program redirects the all command line parameters and pipes the video to the 64-bit executable of x264. Just place the x264_x64_wrapper.exe and the x264_x64.exe (any 64-bit executable of x264 named like that will do the trick) in the same folder. Then reference megui to the x264_x64_wrapper.exe.

1st August 2009, 08:47	#8 \| Link
turbojet Registered User Join Date: May 2008 Posts: 1,840	Thanks for the wrapper aiwa. It's about 5% faster then comparable x86 builds for me on an X2 3800 and Q6600 both Windows 7 RC. It's not quite as much of a gain as I see with pipebuf + avs2yuv which is around 10% but I'll take any speedup at same quality. Could it be number of buffers used?

4th August 2009, 04:36	#10 \| Link
turbojet Registered User Join Date: May 2008 Posts: 1,840	Depending on settings/cpu 2 and 4 MB buffers were the fastest, sometimes considerably faster (5+%) than the other buffer sizes. Maybe 3 MB buffer would be optimal? it hasn't been tested yet.