Hi @Stuart_Fagg, any luck with the new beta?
Hi Aman
Firstly thanks for the detailed explanation & the beta
Iāve mostly been watching in Software mode today & itās been near perfect. Just a couple of minor brief judderrs & none of the glitches exhibited in hardware mode. Only real noticeable negative is long FF/RW is less smooth than the other modes & jumps along the timeline more than a smooth progression like the others
Another observation relates to the aspect ratio issue Is posted about previously, all 3 modes behave differently
Software: Perfect behaviour, switches ratio on the fly to suit material
Hybrid: Plays at correct ratio at start of playback but wonāt change during
Hardware: Always plays at 16:9
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@tmm1
Another day of using software decoding & itās working fine, just the very rare & brief split-second judder, miles better than the other modes
It would be good to get the hardware or hybrid modes fixed though as they do have slicker responses when skipping etc
Something that occured to me is that Plex recently switched to using Exoplayer v2 , no idea if thatās any help but thought Iād mention it
Let me know if you need any more tests or info off me to assist
Thanks again for your unrivaled support
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Thanks for the update. I pushed out an official v2.0.11 with that Decoder option. It will default to hardware, but anyone having issues with green flashes (open happens in some locations) can switch to Software.
I will try to investigate the green flash bug with Hardware some more, but I spent quite a few hours on it already and also contacted Nvidia about it and didnāt make much progress so far.
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Watched a couple of shows with lots of slow camera pans today in software mode & noticing lots of micro-stutter. Not as bad as Hybrid but distracting once you notice it.
Iāve settled on hardware mode for now, silky smooth is worth the trade-off of very occasional green flash
Fingers-crossed you can get to the bottom of it 
@tmm1
As an aside, I just submitted diagnostics for a freeze in hardware mode that normally requires a reboot, however, I force closed the app, opened, then changed decoder to software & was able to play without rebooting. Sadly changing back to hardware mode caused another freeze, when I tried to play again, that did require a reboot.
Not sure if thatās useful but thought Iād mention it
Software mode for me also poor with lots of judder
Fergin
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Sorry to resurrect an old-ish thread but I think I've discovered a workaround and/or another piece of the puzzle. I noticed that I never have any judder/stutter issues on my Apple TV 4 (not 4K), so it got me thinking that maybe the judder issue is somehow related to 4K upscaling. I decided to do a test: I set my Nvidia Shield to output 1080p instead of 4K and I set Channels to software decoding. So far after a couple days I've not experienced any judder/stutter issues. (I no longer have an Apple TV 4K to test.)
Obviously this isn't an ideal solution since most people will want their device to output 4K. However, a very clever developer has created an app on the Shield where you can set the frame rate and resolution per app; I have it set to switch to 1080p 50Hz when Channels launches and it works flawlessly. (I don't think such an app would be possible on the Apple TV 4K.)
It appears the Channels software decoder has an issue when upscaling UK TV to 4K, so for me personally this is the best workaround. (Of course the alternative workaround is to use hardware decoding, but that has issues with aspect ratio changes that have been mentioned before.)
Hopefully other UK users with this issue will find this helpful, and hopefully it will help the devs nail down the issue with judder on UK channels.
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I might have to switch to the new shield when it comes out if this is the case!