Lip sync issues / audio drop out

grandnagas · January 14, 2022 at 1:51 AM

Hi,

I just changed to Libreelec yesterday from running Kodi on Windows, because I don't like the PC feel and it defaulting to windows login all the time.

I am using the same hardware but am experiencing audio drop out and sync issues.

I have it set to passthrough audio and auto change refresh rate. I have also tried all the available audio output options "hdmiO, hdmi1, analog etc, but all similar results. If I set my AVR from video passthough to video adjust that fixes the audio drop out but not the sync.

The only ad-in I have installed is PlexKodiConnect (PKC) which I also used in my previous windows setup.

Hardware is : ntel NUC 10th Gen BXNUC10I5FNH4 i5-10210U

Any assistance would be great.

**Klojum** · January 14, 2022 at 6:20 AM

Please provide a full debug log.

How to post a log (wiki)

1. Enable debugging in Settings>System Settings>Logging
2. Restart Kodi
3. Replicate the problem
4. Generate a log URL (do not post/upload logs to the forum)

use "Settings > LibreELEC > System > Paste system logs" or run "pastekodi" over SSH, then post the URL link

grandnagas · January 14, 2022 at 10:03 PM

Hi,

Thanks for the quick response.

Here is the link to log file. ix.io/3Mcp

Thanks

grandnagas · January 17, 2022 at 10:34 PM

Hi,

Any progress on this problem?

Ken to get resolved so I can enjoy this Kodi install.

Cheers

GDPR-7 · January 18, 2022 at 8:00 PM

I've no idea for/against (?) your issue, but maybe trying nightly might help

be aware: I've also no idea if the addon "PlexKodiConnect" is available for nightly, so check that first !

hint:

you could run nightly also from an usb stick to test before iron your disk

grandnagas · January 22, 2022 at 5:26 PM

Hi,

Can I get a reply from developer after uploading my log?

If not then I’m going to have to drop libreelec and go back Kodi on windows. ☹️

**Da Flex** · January 22, 2022 at 6:50 PM

The out-of-sync issue is visible at the log:

Code

2022-01-14 21:47:58.606 T:1011    DEBUG <general>: CVideoPlayerVideo - CDVDMsg::GENERAL_SYNCHRONIZE
2022-01-14 21:47:58.607 T:1008    DEBUG <general>: CheckPlayerInit - dropping packet type:2 dts:2034824000.000000 to get to start point at 2035783000.000000
2022-01-14 21:47:58.607 T:1008    DEBUG <general>: CheckPlayerInit - dropping packet type:1 dts:2034827000.000000 to get to start point at 2035783000.000000
2022-01-14 21:47:58.607 T:1011    DEBUG <general>: CVideoPlayerVideo - Stillframe left, switching to normal playback

play the same file from USB stick instead of using Plex, and report the result
if Plex has cache settings, increase the cache

grandnagas · January 22, 2022 at 11:51 PM

Thanks,

Played same file from usb and still has same issues. Audio drop out for first 30 seconds or so, the lip sync out.

Any suggestions?

**Da Flex** · January 23, 2022 at 12:54 AM

Then I also suggest the latest nightly LE. Copy the .img.gz file into the .update folder, and reboot. You can downgrade back to LE 10.0.1 the same way.

itisljar · January 23, 2022 at 12:54 PM

Also, try disabling HW decoding of video codec (don't know which it is, for me it was VAAPI), I had simmilar issues in the past, but I have old Celeron class CPU with bugged GPU. Couldn't even watch SD resolution x264 without desync. x265 worked, but only because it has no HW acceleration and it decodes by software.

**Da Flex** · January 23, 2022 at 1:14 PM

Quote from itisljar

Also, try disabling HW decoding of video codec (don't know which it is, for me it was VAAPI), I had simmilar issues in the past, but I have old Celeron class CPU with bugged GPU. Couldn't even watch SD resolution x264 without desync. x265 worked, but only because it has no HW acceleration and it decodes by software.

You've been posted a tweak for another Intel user with nearly the same issue:

RE: Librelec Matrix 10.0.1 freezes randomly when playing video

So maybe this is also helpful for grandnagas . Try it!

grandnagas · January 23, 2022 at 5:28 PM

Thanks Guys,

I downloaded the file but could not find the .upgrade folder, or figure out how to create one.

I tried rolling back to version 9, but that broke the whole system.

So alas I am back on windows, but at least everything works.

When I have some time I'll try again booting from USB and looking further at the suggestions.

**Da Flex** · January 23, 2022 at 7:32 PM

Quote from grandnagas

I downloaded the file but could not find the .upgrade folder, or figure out how to create one.

It's a hidden folder, use cd /storage/.update.

You can also use wget https://test.libreelec.tv/LibreELEC-Generic.x86_64-11.0-nightly-20220123-baa84f0.img.gz to download the file when you're in that folder.

Yes, switching among LE 9 and 10+ will break things, but any switch among LE 10+ versions should work fine.

grandnagas · April 16, 2022 at 8:34 AM

Hi, I spent a couple mores hours on this today, but sadly problems still exist.

I installed on a usb as not to alert my windows install.

Firstly big problems with video sync. Was able to resolve these mostly if added a white list.

Audio only dropped out a couple of times in the first 10-20 sec then was ok and no noticeable lip sync issue.

The biggest problem in video sync every time you select a menu in the Kodi os I lost sync and went in a unusable loop.

Overall still unusable and unstable, compared to windows which has no issues.

grandnagas · June 21, 2022 at 10:27 PM

Update.

I have upgraded my AVR from an old Denon 4310, to a Anthem 1140 and now have no issues.

Very stable and no dropouts.

A small amount of lip sync problem. Is out 20ms, but if I turn off HW acceleration looks ok.

I also had a demo of the new Denon 4700 and it had no issues with Libeelc either. (FYI as a side note the Anthem blows away the Denon.)

So it looks like it was some compatibility issue with my old AVR. To be fair that AVR was about 15 years old.

Im back in love with Libreelec!

**chewitt** · June 23, 2022 at 7:10 AM

It's not the first time someone reports an issue with Denon AVR

grandnagas · July 12, 2022 at 5:27 AM

I've had some more time to watch moves and can report some issues.

4k movies (MKV) need the audio advanced by 150-175. It is unusual that the sound is lagging behind the video. I have it set to passthrough so would expect no delays in the audio, if anything I would expect the audio to be first and video lagging.

SD has no issues.

1080p is similar to 4k but need to watch a few more to be sure on the timming.

If I turn off the hardware accelerator they are unwatchable as the video is so choppy.

Any thoughts?

grandnagas · July 16, 2022 at 4:41 AM

Update,

1080 is fine. So looks to be just a 4k issue.

Anyone out there have this to?

Lip sync issues / audio drop out

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