Brightness Fluctuation when watching movies on Emby Theater for PC

[gwujkiw 2]

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.

[Luke 40146]

@ have you seen this before?

[Guest asrequested]

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

[gwujkiw 2]

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

[Guest asrequested]

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

[gwujkiw 2]

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.

[Guest asrequested]

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

 

https://emby.media/community/index.php?/topic/76664-hdr-and-emby-theater-desktop-explained/&do=findComment&comment=778074

Edited August 20, 2019 by Doofus

[gwujkiw 2]

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

Edited August 19, 2019 by gwujkiw

[Guest asrequested]

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

Edited August 20, 2019 by Doofus

[gwujkiw 2]

[gwujkiw 2]

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.

[Guest asrequested]

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.

[gwujkiw 2]

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

[gwujkiw 2]

Okay that fixed the fluctuating issue.

[Guest asrequested]

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/manual/stable/#options-hdr-compute-peak

Edited August 22, 2019 by Doofus

[CrossCech 8]

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

 

https://emby.media/community/index.php?/topic/76664-hdr-and-emby-theater-desktop-explained/&do=findComment&comment=778074

 

 

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. 

[Luke 40146]

Are you still running into this?

[sooty234 266]

Make an mpv.conf

https://mpv.io/manual/master/#files-on-windows

Put this line in it and set it to no

https://mpv.io/manual/master/#options-hdr-compute-peak

 

[Luke 40146]

10 hours ago, sooty234 said:

Make an mpv.conf

https://mpv.io/manual/master/#files-on-windows

Put this line in it and set it to no

https://mpv.io/manual/master/#options-hdr-compute-peak

 

Great tip, thanks !