Does choosing any of the x264 presets (Film, Animation, Grain, etc) affect the render time considerably?
Apologies if this has been answered before, I simply can't find it.
Thank you.
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I believe all those are filter settings, and if so, they would affect render time. How much depends on what filtering they are using. But another member may have a better answer.
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The x264 tuning parameter is not a video filter, but a rules set to alter encoder parameters. See the output of "x264 --fullhelp":
Code:--tune <string> Tune the settings for a particular type of source or situation Overridden by user settings. Multiple tunings are separated by commas. Only one psy tuning can be used at a time. - film (psy tuning): --deblock -1:-1 --psy-rd <unset>:0.15 - animation (psy tuning): --bframes {+2} --deblock 1:1 --psy-rd 0.4:<unset> --aq-strength 0.6 --ref {Double if >1 else 1} - grain (psy tuning): --aq-strength 0.5 --no-dct-decimate --deadzone-inter 6 --deadzone-intra 6 --deblock -2:-2 --ipratio 1.1 --pbratio 1.1 --psy-rd <unset>:0.25 --qcomp 0.8 - stillimage (psy tuning): --aq-strength 1.2 --deblock -3:-3 --psy-rd 2.0:0.7 - psnr (psy tuning): --aq-mode 0 --no-psy - ssim (psy tuning): --aq-mode 2 --no-psy - fastdecode: --no-cabac --no-deblock --no-weightb --weightp 0 - zerolatency: --bframes 0 --force-cfr --no-mbtree --sync-lookahead 0 --sliced-threads --rc-lookahead 0
If you mean the encoding speed during the conversion: Yes, some tunings alter basic parameters which change the complexity (max. of consecutive B frames and reference frames, Psy-RDO, AQ) and thus the encoding time.
If you mean the decoding speed in a player: Yes, also the decoding may be affected (there is a tuning "fastdecode"). -
Thank you guys,
I did some tests and can confirm that the x264 tunes take longer to render.
For a 5 minute video with default settings it took 16 minutes.
For the same video with the "Animation" tune it took 17 minutes.
This is a Quad Core 2.4Ghz processor. With i7 or higher probably you won't even notice the difference.Last edited by lonrot; 1st Jul 2014 at 18:59.
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Tune animation adds 2 more consecutive B frames and doubles no. of reference frames. That increases encoding time.