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| TCmullet |
| Posted: Jan 2 2013, 10:07 PM |
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Advanced Member
Group: Members
Posts: 312
Member No.: 3970
Joined: 2-May 03
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I see the Threading item in Preferences...
Video compression threads = 0
"Zero disables video compressor multithreading. '1' causes the compressor to run in a separate thread... values greater than 1 not yet supported". I gather this is simply a 0 or 1, 1 meaning "yes, let video compression run in a separate thread".
Video filter threading = 1 thread (from a dropdown of choices)
It appears I can specify how many threads to be allowed for filter processing (assuming as I read somewhere that all this applies only when my codec is key-frame only). I do see an "auto" option.
I have a 4-core system (for example). How do these 2 parameters interact? How would I set it up? 1 for compressor and 3 for filter threading? Or maybe it should be 1 for compressor and 2 for filter, as 1 would be needed for the rest of the OS. I guess the "auto" for filter threading would work, but I'd like to know how to do it manually, too.
To make the question even more complicated (not my intention, I assure you), what if I'm using a codec such as Lagarith, which has a switch allowing me to specify that it will use multithreading if processor is so equipped?
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Although it's not threading, "process-ahead" is also on that pane. I remember (from years ago) that the temporal cleaner works on multiple frames. Is this something that controls that? Would "auto" be best to always have it at? |
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| -vdub- |
| Posted: Jan 3 2013, 09:02 AM |
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Advanced Member
Group: Members
Posts: 613
Member No.: 27087
Joined: 24-February 10
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| QUOTE (TCmullet @ Jan 2 2013, 10:07 PM) | (assuming as I read somewhere that all this applies only when my codec is key-frame only)
To make the question even more complicated (not my intention, I assure you), what if I'm using a codec such as Lagarith, which has a switch allowing me to specify that it will use multithreading if processor is so equipped?
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Lossless avi video is only I frames, I guess would be the same for largarith etc.
Using this for other encoders xvid, x264 etc then would be of no use when encode with I_P or both I_P_B.
I hadn't read of it was only for I frame video. So will be testing this with a few encoders to see if there is an encoding speed up gain by not having it set for xvid, x264 encoders and others. |
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| jpsdr |
| Posted: Jan 3 2013, 10:08 AM |
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Advanced Member
Group: Members
Posts: 335
Member No.: 20490
Joined: 23-December 06
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You can have in video compression value up to 4 max.
BUT, value higher than 1 is allowed only for codec... don't remember the exact name, which have only I frame.
So, it's ok for codec like Lagarith, huffyuv, UT video, but not with codec like xvid, divx, h264, and other like.
It's what phaeron said a long time ago... |
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