VLC 1.1.3 transcoding high CPU usage

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nereikianieko
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VLC 1.1.3 transcoding high CPU usage

Postby nereikianieko » 19 Aug 2010 14:51

I've tried transcoding live content with VLC 1.1.3 and it has extremely high CPU usage (45-60% CPU) compared to VLC 1.0.5 (15-20% CPU)

Both VLC are running with default preferences, vlc is started with telnet interface enabled:
vlc.exe -I dummy --intf="http" --http-host="127.0.0.1:8603" --extraintf="telnet" --telnet-port="8703" --telnet-password="xxx"

I'm trying transcode the same content, the same PC with CPU AMD Athlon II X4 630 running at 3Gz , Windows XP.
My transcoding line is as follows:
#transcode{vcodec=h264,venc=x264{vbv-maxrate=128,vbv-minrate=128,qcomp=0,ratetol=0.1,keyint=20}vb=128,width=320,height=240,me=umh,acodec=mp4a,ab=128,channels=2,samplerate=44100,audio-sync}

VLC_help
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Re: VLC 1.1.3 transcoding high CPU usage

Postby VLC_help » 19 Aug 2010 17:01

AFAIK x264 default settings have changed dramatically between VLC 1.0.5 and VLC 1.1.3 releases. So you need more parameters if you want to use same settings now.

nereikianieko
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Re: VLC 1.1.3 transcoding high CPU usage

Postby nereikianieko » 20 Aug 2010 16:11

Is there any new help or documentation for this? I'm really confused right now, because looking at the documentation, I'm not sure is it suitable for new version (1.1.x) or not...
I remember there was a page about x264 settings, but now I just cannot find it on videolan.org, using Google, in my bookmarks, anythere. Was it removed?

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Re: VLC 1.1.3 transcoding high CPU usage

Postby tunczyk » 20 Aug 2010 16:27

Helo, my english is bad. I testing VLC and MPC-HC. In both programs turned GPU ATI 3670 (xps-studio T9600) with latest 10.7 drivers (changelog hardare support VLC 1.1.1)
Here are the results:

Image
Image

difference in favor of homecinema, in principle, twice: (
Why?
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Re: VLC 1.1.3 transcoding high CPU usage

Postby Jean-Baptiste Kempf » 20 Aug 2010 16:31

Helo, my english is bad. I testing VLC and MPC-HC. In both programs turned GPU ATI 3670 (xps-studio T9600) with latest 10.7 drivers (changelog hardare support VLC 1.1.1)
Here are the results:

Image
Image

difference in favor of homecinema, in principle, twice: (
Why?
Totally irrelevant to the thread.

MPC-HC uses DxVA and VLC DxVA2, and DxVA2 doesn't work correctly with ATI 3xxx
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VLC_help
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Re: VLC 1.1.3 transcoding high CPU usage

Postby VLC_help » 21 Aug 2010 20:01

nereikianieko: x264 settings can be found at least from http://mewiki.project357.com/wiki/X264_Settings (I didn't check if that page is updated)


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