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More => Old Versions => JRiver Media Center 27 for Windows => Topic started by: tij on October 19, 2020, 01:16:26 am

Title: Software video decoding in Windows 10 v2004
Post by: tij on October 19, 2020, 01:16:26 am

Which exe/dll in JRiver responsible for software video decoding.

Testing Windows v2004 ... and its nightmare ... atm i am stuck with making 4k60fps stuff work.

It used to have no problems in v1909 ... now with software decoding none of the rendering queues can be filled and videos stutters like crazy ... with hardware decoding on, rendering ques gets fill in , but got "presentation glitches" reported in MadVR OSD - can see occasional stutter

software decoding works fine for 23fps stuff ... and 1080i60 ... its just 2160p59 thats a problem

Wonder which exe/dll in JRiver responsible for software video decoding ... then I can add in Antivirus exception

PS. v2004 ... seems slower, eg opening NVidia control panel is lagging ... other stuff too

Title: Re: Which exe/dll in JRiver responsible for software video decoding
Post by: JimH on October 19, 2020, 07:37:38 am

Try toggling hardware acceleration.

Could it be madVR?

Title: Re: Which exe/dll in JRiver responsible for software video decoding
Post by: tij on October 19, 2020, 09:55:19 pm

Quote from: JimH on October 19, 2020, 07:37:38 am

Try toggling hardware acceleration.

Could it be madVR?

I dont think its MadVR as MadVR does not do video deciding.

Only problem in v2014 I cannot figure is 2160p59 (other probkems like 3D not working have weird solutions) ... as i mentioned, do software decoding with 2160p59  does not fill any madVR queues ... do hardware decoding fills queue but have "presentation glitches".

Updating motherboard bios and drivers, solved " presentation glitches" ... so hardware decoding works

But software decoding still cannot keep up for 2160p59 resulting in empty queue in MadVR ... lots of stuttering

Using software decoding on my machine:
1. 1080i59 uses 32% cpu
2. 1080p23 uses 24%
3. 2160p23 uses 63%
4. 2160p59 uses 100%
I believe LAV components is doing decoding ... this was not issue on 1909

... wonder if v2004 patch some security hole that resulted in CPU performance drop (pity i did not benchmark my PC before)

in short ... ppl who are into video ... i recommend not to upgrade to v2004 at the moment

Title: Re: Software video decoding in Windows 10 v2004
Post by: justsomeguy on October 20, 2020, 12:26:31 am

C:\Users\%userprofile%\AppData\Roaming\J River\Media Center 27\Plugins\lav64

That is where all the LAV files are that MC uses.

Title: Re: Software video decoding in Windows 10 v2004
Post by: tij on October 20, 2020, 12:43:00 am

Quote from: justsomeguy on October 20, 2020, 12:26:31 am

C:\Users\%userprofile%\AppData\Roaming\J River\Media Center 27\Plugins\lav64

That is where all the LAV files are that MC uses.

thx ... will try to add those to AV exceptions see if thatcmakes any difference

Title: Re: Software video decoding in Windows 10 v2004
Post by: tij on October 22, 2020, 03:36:24 am

Quote from: tij on October 20, 2020, 12:43:00 am

thx ... will try to add those to AV exceptions see if thatcmakes any difference

Nope ... excluding LAV's dll/exe from AntiVirus, still cannot software decode 2160p59 fast enough ... still 100% cpu ... still stutters badly

v2004 Windows really did something as this was not a problem on v1909

While this does not really affect me, as my hardware decoding works (thank god for that) ... it might affect ppl relying on this feature