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Brightness Fluctuation when watching movies on Emby Theater for PC


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#1 gwujkiw OFFLINE  

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Posted 18 August 2019 - 11:43 PM

I am getting a brightness or contrast fluctuation when using Emby Theatre on the PC in certain scenes.  It gets brighter then darker.  I have all the things that would cause something like this in the Samsung's actual tv's settings turned off such as dynamic contrast, etc....

 

I don't get this using other programs or windows or while watching from other sources.  It also didn't happen with Plex.

 

Any idea what would be causing this?

 

hardware is a intel nuc8i5bek.  If no one has any ideas I suppose it could be the display driver.



#2 Luke OFFLINE  

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Posted 18 August 2019 - 11:46 PM

@Doofus have you seen this before?

#3 Guest_asrequested_* OFFLINE  

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Posted 18 August 2019 - 11:56 PM

I'd need to get my hands on the video. Can you share it? 



#4 gwujkiw OFFLINE  

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Posted 19 August 2019 - 12:37 AM

Yea it’s a rather large 4K video but yea I’ll get you a link.

#5 Guest_asrequested_* OFFLINE  

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Posted 19 August 2019 - 12:54 AM

I suspected it was. HDR? You might be seeing the results of peak detection.

#6 gwujkiw OFFLINE  

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Posted 19 August 2019 - 12:54 AM

One example is right around 47:20 into the movie which I will upload. It happens quite often but it’s easy to see here.

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Posted 19 August 2019 - 12:57 AM

Try using the zip file I attached at the end of this post

https://emby.media/c...ed/#entry778074

Edited by Doofus, 20 August 2019 - 10:51 AM.


#8 gwujkiw OFFLINE  

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Posted 19 August 2019 - 01:02 AM

I am actually not sure if the particular movie rip is hdr, is there an easy way I can tell?

Edited by gwujkiw, 19 August 2019 - 01:04 AM.


#9 Guest_asrequested_* OFFLINE  

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Posted 19 August 2019 - 01:07 AM

Play the video and pull up the stats for nerds. Take a screenshot and post it.

Edited by Doofus, 20 August 2019 - 02:21 PM.


#10 gwujkiw OFFLINE  

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Posted 19 August 2019 - 01:32 AM

5d5a34610b4c5_IMG_2123.jpg



#11 gwujkiw OFFLINE  

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Posted 19 August 2019 - 01:34 AM

Other thing to note is if I have UHD Color on or off, which is what enables the expanded color gamut on the the samsung tv the same thing still happens when watching the movie.  Not sure if that helps you in anyway narrow things down.



#12 Guest_asrequested_* OFFLINE  

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Posted 19 August 2019 - 01:39 AM

Yeah, it's HDR. Use the zip file with the instructions I linked. And see what happens. Turn on HDR in Windows. Actually, you should probably read that whole post.

#13 gwujkiw OFFLINE  

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Posted 19 August 2019 - 01:41 AM

Yeah, it's HDR. Use the zip file with the instructions I linked. And see what happens. Turn on HDR in Windows. Actually, you should probably read that whole post.

 

Yes already started reading it.  Thanks



#14 gwujkiw OFFLINE  

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Posted 19 August 2019 - 10:49 AM

Okay that fixed the fluctuating issue.



#15 Guest_asrequested_* OFFLINE  

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Posted 19 August 2019 - 12:51 PM

It isn't an error. There is an option that calculates the peak brightness and then it will dynamically adjust based on the result. So in that config, I have it disabled.

hdr-compute-peak=no

https://mpv.io/manua...dr-compute-peak

Edited by Doofus, 22 August 2019 - 05:49 AM.


#16 CrossCech ONLINE  

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Posted 22 May 2020 - 05:36 PM

Try using the zip file I attached at the end of this post

https://emby.media/c...ed/#entry778074

 

 

Why are all of the links by the member formerly known as @doofus no longer working? 

 

I've been having several performance issues with my W10 Emby Theater with HDMI AV (all audio options available) setup and my research leads me through several of his posts with non-working links. Problems like no CC for LIVE TV or TV recordings (still reliant on WMC for that), some audio sync issues with certain files too complex to briefly explain here, and like this particular post topic ... having dark scene fluctuation that may be solved using the peak detection no command.

 

I'm not a savvy coding programmer so when it comes to scripting and configuring mpv.conf I'm lost. So I was hoping to find some working scripts that I could C & P and maybe stumble my way into cobbling something that works. Frustrating though that all these links don't work. 






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