Audio out of synch with nextPVR.exe

[mvallevand]

September seems correct, I guess I am using a newer libmpv.

The libSkiaSharp library creates the images for UI clients. It is the only explanation I can give for the server crashing. Sub will be releasing a new release with an update for it soon. For sure if you change channels it will crash. UI clients are very slow and yauiclient is not mouse friendly it was designed only for a keyboard of remote so be slower than with NextPVR.exe

Martin

[Higgo]

I am revisiting this issue as I have identified that the problem relates to High Definition broadcasts. 
This is despite a clean install of Windows 11, 32 bit LAV decoders, NextPVR Version: 7.0.2.250621.
I also changed the live TV buffer folder to a different (HDD) drive to C: (a SSD where NextPVR.exe is installed)
As before, HD recordings and live HD TV play close to perfectly in the webclient (http://localhost:8866/).  Playback of recordings in VLC is also great.
The NextPVR.exe application copes with playing live TV standard definition broadcasts BUT NOT HD where it has unacceptable synch problems between audio and video.  (I haven't checked SD recordings.)  Interestingly, the live HD TV through NextPVR.exe is initially in synch, but after about 10 seconds starts deteriorating. The next time I try it, there is no inital in-synch start—it's out of synch immediately.

I've attached the NextPVR logfiles.
Tried to attach a System Information system summary as a text file but that doesn't seem to work.  I've just appended the text below.

Hoping somebody can diagnose the problem!

System Information system summary
OS Name Microsoft Windows 11 Home
Version 10.0.26100 Build 26100
Other OS Description Not Available
OS Manufacturer Microsoft Corporation
System Name QUIETPC
System Manufacturer System manufacturer
System Model System Product Name
System Type x64-based PC
System SKU ASUS_MB_CNL
Processor Intel® Pentium® Gold G5420 CPU @ 3.80GHz, 3792 Mhz, 2 Core(s), 4 Logical Processor(s)
BIOS Version/Date American Megatrends Inc. 2418, 4/06/2019
SMBIOS Version 3.2
Embedded Controller Version 255.255
BIOS Mode UEFI
BaseBoard Manufacturer ASUSTeK COMPUTER INC.
BaseBoard Product ROG STRIX B360-I GAMING
BaseBoard Version Rev X.0x
Platform Role Desktop
Secure Boot State Off
PCR7 Configuration Binding Not Possible
Windows Directory C:\WINDOWS
System Directory C:\WINDOWS\system32
Boot Device \Device\HarddiskVolume4
Locale United States
Hardware Abstraction Layer Version = "10.0.26100.1"
User Name QuietPC\ianhi
Time Zone AUS Eastern Standard Time
Installed Physical Memory (RAM) 8.00 GB
Total Physical Memory 7.85 GB
Available Physical Memory 2.67 GB
Total Virtual Memory 9.73 GB
Available Virtual Memory 2.46 GB
Page File Space 1.88 GB
Page File C:\pagefile.sys
Kernel DMA Protection Off
Virtualization-based security Not enabled
App Control for Business policy Enforced
App Control for Business user mode policy Audit
Automatic Device Encryption Support Reasons for failed automatic device encryption: TPM is not usable, PCR7 binding is not supported, Hardware Security Test Interface failed and device is not Modern Standby, Un-allowed DMA capable bus/device(s) detected, Disabled by policy, TPM is not usable
Hyper-V - VM Monitor Mode Extensions Yes
Hyper-V - Second Level Address Translation Extensions Yes
Hyper-V - Virtualization Enabled in Firmware No
Hyper-V - Data Execution Protection Yes

[mvallevand]

I know earlier asked that you had LAV32 installed and are you absolutely sure you have all your audio decoders set to LAV as shown on @Rich A's screenshot.

Sub did release a patch you should be using for NextPVR.exe and UI clients https://forums.nextpvr.com/showthread.ph...#pid601879 I think a full update is coming soonish.

Martin

[Higgo]

Thanks Martin,
yes, I only installed LAV32. I will check if they comply with Rich A's example. Thanks for the note about the patch.
Cheers,

[Rich A]

FWIW, I recall reading somewhere that it was best to install both the 32 and 64 bit versions of LAV.

[Higgo]

Update:
I swapped those NextPVRUI.dll files with Sub's updates. That didn't help.
Also, after checking other channels, NextPVR.exe is in synch only one channel's SD broadcast. Other SD channels still have poor synch of audio with video.

[mvallevand]

Since I assume you are using LAV correctly, I think the only thing I suggest is you go back to using yauiclient as we discussed earlier your sample played OK here.

Martin

[drlava]

I've had this issue for years and only recently fixed it by installing the latest k-lite codec pack (1905 standard) which includes LAV version 80.0-1 git
set all decode filters to LAV and in the audio LAV settings enable auto A/V sync correction. This is using nextPVR 5.2.6 (220206)

[Higgo]

Thanks drlava!
I'll try that.

[mvallevand]

LAV v80 is available on the normal release page. No need for a codec pack. Just follow the link from NextPVR.exe decoder setup

Martin