Audio desyncing and random skips

Help and Support Vero V
1

Have an issue with SD video content on the VERO V slowly drifting out of sync with the audio stream. On some files the video will stutter after a while and catch up to the audio, only to drift out of sync again.

Here is the mediainfo for the Video and Audio Streams in a file with the problem:

General
Complete name : Z:\TV Shows\OC\The OC S02 E01 The Distance (Full).mpg
Format : MPEG-PS
File size : 1.70 GiB
Duration : 43 min 50 s
Overall bit rate mode : Variable
Overall bit rate : 5 538 kb/s

Video
ID : 224 (0xE0)
Format : MPEG Video
Format version : Version 2
Format profile : Main@Main
Format settings : CustomMatrix / BVOP
Format settings, BVOP : Yes
Format settings, Matrix : Custom
Format settings, GOP : Variable
Duration : 43 min 50 s
Bit rate mode : Variable
Bit rate : 5 235 kb/s
Maximum bit rate : 9 800 kb/s
Width : 720 pixels
Height : 480 pixels
Display aspect ratio : 16:9
Frame rate : 29.970 (30000/1001) FPS
Standard : NTSC
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.505
Time code of first frame : 00:59:58:00
Time code source : Group of pictures header
Stream size : 1.60 GiB (95%)

Audio
ID : 189 (0xBD)-128 (0x80)
Format : AC-3
Format/Info : Audio Coding 3
Commercial name : Dolby Digital
Format settings : Dolby Surround
Muxing mode : DVD-Video
Duration : 43 min 50 s
Bit rate mode : Constant
Bit rate : 192 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 31.250 FPS (1536 SPF)
Compression mode : Lossy
Stream size : 60.2 MiB (3%)
Service kind : Complete Main

The logs recorded while playing are here:

https://paste.osmc.tv/wimiyoqije

Thanks for any insights.

2

We’re already aware of some Audio/Video sync issues and are currently investigating them. Stay tuned …

3

I’m having the same, but it’s 1080p material. Gets a little out.

4

Same here. I experience it with PVR playback from UK FreeSat streams and recordings especially. I’ve tried earlier suggestions about turning off audio pass-through, but that didn’t help.

5

Can you check if you get it from a recording with pass through enabled?

There’s a hunch that says you won’t, but as soon as you disable pass through you will.

6

Hi, I am having similar issues with recordings from DVDViewer. With pass through enabled unfortunately. Will try with disabled and check what happens.

7

Well,

I first enabled pass-through again and restarted the recording, which showed the syncing issue again. However, I then rebooted my Vero V (keeping pass-through enabled) and indeed, the recording no longer shows the syncing issue anymore.

Thanks for this hint, as this will makes things a bit better :slight_smile: