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IDProjectCategoryView StatusLast Update
0000172madVRbugpublic2014-03-10 23:34
Reporterhuhn Assigned Tomadshi  
Status closedResolutionno change required 
Platformx64OSwindows 7OS Version7601
Summary0000172: smoothmotion creates blurring with HFR files
Descriptionsmoothmotion 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.
Steps To Reproduceenable smooth motion, mode doesn't matter.
play a file with higher frame rate than the display is set.
Additional Informationthis 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.
TagsNo tags attached.
madVR Version87.4
Media Player (with version info)mpc-hc
Splitter (with version info)lavfilter 60.1
Decoder (with version info)lavfilter 60.1
Deinterlacingnone (progressive)
DXVA2 Scaling Activeno
Aero / Desktop CompositionOn
Problem occurs with modeall modes
GPU ManufacturerAMD
GPU Modelr9 270
GPU Driver Version14.2



2014-03-04 17:57

administrator   ~0000446

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?


2014-03-04 18:09

reporter   ~0000447

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.


2014-03-10 20:47

administrator   ~0000483

There wasn't really much feedback about this in the forum, so I guess the interest was simply not very high. FWIW, you can setup profiles to auto-disable smooth motion FRC for HFR sources. I think that's the best solution for now. So I'd like to close the bug report.



2014-03-10 22:00

reporter   ~0000484

it's fine to close it.
should i created some bugs with 120 fps file like playback to fast in fullscreen exclusive mode so you can keep them in the tracker? to fix them in later development.

i may create a new 120 fps test clip in 1 month or later, pc controlled and try it again. but yeah it's just no one cares and i can't blame them X-).


2014-03-10 23:34

administrator   ~0000485

If that's a real bug with FSE mode, then sure, create a bug report for that.

Issue History

Date Modified Username Field Change
2014-03-04 17:51 huhn New Issue
2014-03-04 17:57 madshi Note Added: 0000446
2014-03-04 17:57 madshi Assigned To => madshi
2014-03-04 17:57 madshi Status new => feedback
2014-03-04 18:09 huhn Note Added: 0000447
2014-03-04 18:09 huhn Status feedback => assigned
2014-03-04 18:17 madshi Status assigned => feedback
2014-03-10 20:47 madshi Note Added: 0000483
2014-03-10 22:00 huhn Note Added: 0000484
2014-03-10 22:00 huhn Status feedback => assigned
2014-03-10 23:34 madshi Note Added: 0000485
2014-03-10 23:34 madshi Status assigned => closed
2014-03-10 23:34 madshi Resolution open => no change required