is there any video quality difference if i use all same settings in CRF, only changes x264 preset?
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Yes. Higher (slower) presets deliver better quality at the same CRF.
thank you for the reply
preset ssim bitrate ultrafast 0,9931685 6311 superfast 0,9948741 3000 veryfast 0,9918827 1387 faster 0,9938993 1716 fast 0,9942391 1909 medium 0,9943883 1918 slow 0,9945562 1925 slower 0,9946028 1904 veryslow 0,9943008 1771 placebo 0,9945342 1796
I disagree. You can see that very fast SSIM is bit worst then others. It also create smallest filesize at faster speed. On SSIM it seems very small difference but in few minutes it can create smallest size at faster time. Probably this is exception but it is significant.
Here is graph for 3 min of video. Do not remember if it is H.265 or H.264 but expecting at least similar results.
So it is different look. It do not take in account any PSNR or SSIM.
In 3mins just video SD 720x576 there is 7MB difference at much faster encoding time. So I think very fast will not deliver similar quality. Also it is seems on ssim in previous post by sneaker.
O.k. didn't read last sentence. So same here
Last edited by Bernix; 9th Sep 2018 at 06:40. Reason: Edit adding last