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Judder on Frame Rate Switching


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#21 Doofus OFFLINE  

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Posted 23 October 2017 - 03:42 PM

So with those settings, frame rate switching doesn't work at all? If that's the case we need to get you set up with logging so @randomevents can take a look.

#22 Sammy OFFLINE  

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Posted 23 October 2017 - 04:23 PM

I'm considering getting this GPU. Thoughts?



#23 Doofus OFFLINE  

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Posted 23 October 2017 - 04:34 PM

That'll work. But remember that nvenc only supports two transcodes.

#24 Doofus OFFLINE  

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Posted 23 October 2017 - 04:35 PM

You should read through this thread, but it's for server use.

https://emby.media/c...-65#entry502352

Edited by Doofus, 23 October 2017 - 04:44 PM.


#25 Doofus OFFLINE  

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Posted 23 October 2017 - 04:42 PM

Disregard this post

Edited by Doofus, 23 October 2017 - 04:44 PM.


#26 Sammy OFFLINE  

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Posted 23 October 2017 - 04:53 PM

That'll work. But remember that nvenc only supports two transcodes.

 

I'm not sure how that fits into the card I'm considering.

 

You should read through this thread, but it's for server use.

https://emby.media/c...-65#entry502352

 

I guess I shall..



#27 Sammy OFFLINE  

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Posted 23 October 2017 - 04:54 PM

Wait! There's nearly 1300 posts!


Edited by Sammy, 23 October 2017 - 04:54 PM.


#28 Sammy OFFLINE  

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Posted 23 October 2017 - 04:55 PM

BTW, should I be considering Radeon over nVidia?



#29 Sammy OFFLINE  

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Posted 23 October 2017 - 05:09 PM

So with those settings, frame rate switching doesn't work at all? If that's the case we need to get you set up with logging so @randomevents can take a look.

 

It works if "works" is defined as changing the output to 23.976fps and a lot of frame drops or repeats is acceptable. Otherwise, I guess not. Thing is that if I dial back madVR settings frame rate switching worked long ago on an i3 530 with iGPU so I have no reason to believe that it wouldn't work now although I haven't tested it. I can report that the playback in madVR with the settings I had for my HD7850 causes massive stuttering though. I haven't tweaked it much at all.


Edited by Sammy, 23 October 2017 - 05:18 PM.


#30 Doofus OFFLINE  

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Posted 23 October 2017 - 05:12 PM

Nvidia is better supported than radeon. Just for playback, that card should work well. MPV should work well with it. I don't have an Nvidia card to test with, but a lot of people use them.

#31 Doofus OFFLINE  

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Posted 23 October 2017 - 05:15 PM

It works if "works" is defined as changing the output to 23.976fps and a lot of frame drops or repeats is acceptable. Otherwise, I guess not. thing is that if I dial back madVR settings frame rate switching worked long ago on an i3 530 with iGPU so I have no reason to believe that it wouldn't work now although I haven't tested it. I can report that the playback in madVR with the settings I had for my HD7850 causes massive stuttering though. I haven't tweaked it much at all.

I think we need to take a closer look at your refresh rate switching. We need logging.

Add this to your mpv.conf and choose your location

log-file=" \mpv log.txt"

Edited by Doofus, 23 October 2017 - 05:18 PM.


#32 Sammy OFFLINE  

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Posted 24 October 2017 - 08:32 AM

I got it working with a video driver update but if the video bitrate is low It still stutters, something that motion smoothing in madVR would resolve.



#33 Sammy OFFLINE  

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Posted 24 October 2017 - 08:40 AM

Additionally, having better smoothing algorithm or having a bit rate check whereupon it doesn't change the frame rate below a specified bit rate would be a nice feature.



#34 Doofus OFFLINE  

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Posted 24 October 2017 - 10:21 AM

Additionally, having better smoothing algorithm or having a bit rate check whereupon it doesn't change the frame rate below a specified bit rate would be a nice feature.


Changing the bitrate would be transcoding. Do you mean refresh rate switching?

#35 Sammy OFFLINE  

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Posted 24 October 2017 - 11:12 AM

The way I understand it there's bit rate and frame rate. Frame rate is what the refresh rate of the display is and should match the source best as possible. Film is shot at 23.976 frames per second and that is what we're changing to match on the display. Bit rate is the density or quality of the source material. The higher the bit rate the better the quality. I have an mkv encoded at around 5mbs that stutters and another one encoded at 20mbs that doesn't. (Don't ask) What I'm wondering is if ET / mpv can check the bit rate of the source and not do frame rate switching if it is below some certain level. It seems that lower bit rate videos look fine with a 3:2 pull down scheme but stutter with frame rate switching and higher bit rate videos do just fine with frame rate switching and look fine with a 3:2 pull down scheme if frame rate switching is turned off.

 

I hope I am making sense here.


Edited by Sammy, 24 October 2017 - 11:13 AM.


#36 Doofus OFFLINE  

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Posted 24 October 2017 - 12:09 PM

Given your description of the problem, the bitrate should have no part in the cause. And should have nothing to with refresh rate switching. It sounds like it has to do with the file, itself. The way it's been encoded, how it was muxed etc. It's a weird one. Can you share one of the files you experience judder, with?

#37 Sammy OFFLINE  

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Posted 26 October 2017 - 10:47 AM

Is it the file? What to do to change it or improve it for better playback? I don't mind switching frame rate but for my wife that is a whole other story. She wants to just hit play.



#38 Doofus OFFLINE  

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Posted 26 October 2017 - 05:12 PM

I need to be able to reproduce the problem before I can determine what's wrong. I'll put it through its paces, tonight.

#39 Doofus OFFLINE  

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Posted 26 October 2017 - 09:25 PM

Well Sammy, unfortunately, refresh rate switching isn't working for me, at all. There are updates for that in the pending release. As for now, I can't test your file. I'll hold on to it. Hopefully the new release will be available, soon.

 

But I am wondering about your subtitles. They are SUBRIP. My first test would have been to remove them.


Edited by Doofus, 26 October 2017 - 09:33 PM.


#40 Sammy OFFLINE  

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Posted 26 October 2017 - 09:42 PM

Refresh rate switching is working for me. Are you using a beta ET or Server?

 

So mux out the subs and mux in an srt or just use external?






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