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Originally Posted by huhn
Quote:
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Originally Posted by Madshi
Quote:
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Originally Posted by huhn
smoothmotion creates blurring with HFR files.
smoothmotion triggers when movie frame rate is higher than display frame rate, this causes a lot of blurring.
the effect is extreme with 30 fps file on a 23p screen.
this can cause huge problems on 4k 30 fps displays or with 120+ fps files.
smooth motion shouldn't be trigger when the FPS is way higher than the display refresh rate. i don't know if a true 60 fps file makes problem on a 59p screen.
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Well, I'm not totally sure about this one. The alternative would be dropping frames like crazy. Smooth motion will at least provide a smooth playback experience. Sure, it will blur a lot. But isn't that better than sharp juddering motion? Actually the algorithm to do this is quite complicated. So this is absolutely not an accident, but intentional. Whether it's good is another question. But I don't think this is a bug. Instead it might make sense to discuss this on the doom9 forum first? |
yeah why not discussing this first. but it may be better to drop frames at least if the file fps is a multiply of the display refresh rate (no judder)but let's see what other people on doom9 think after seeing/reproducing this problem. |
source: http://bugs.madshi.net/view.php?id=172
the "problem" i see with HFR files on "low" frame rate display is a lot of blur and even ghosting. so i'm question if this is the right way to handle these files.
so a realistic case is a 60 fps file on a max 30 fps screen. (4k hdmi 1.4 displays)
here is a file i created to trigger a bug in madvr(you may encounter it too, but it is reported and fixed in 87.5) it's a real vfr ~ 119 fps 5 sec sample:
file
you should be able to reproduce the blur and ghosting from smooth motion.
you only have to actived smooth motion, all smooth motion settings trigger on a 60 fps screen
so what did the reader of this thread think about this? i'm totally aware that this is NOT a serious problem because 120 fps file are very rare and 30 fps max displays even more.
i may created a CFR 120 fps file with really high motion later if i find the time. higher motion= higher effect.