[TESTING] Linux 4.9 kernel and improved video stack for Vero 4K / 4K +

I was able to test a 1080 50i h264 and it played correctly, no judder at 50fps. Posting this as upon starting playback, I had a blank screen event, introduced since the March update, as discussed in a separate thread. I have found that if I switch my AVR to a different input and then back, the display is recovered. Not specific to 4.9 but I hope the log helps.


Thanks. I get no judder on my HDTV recordings (h264 - ts). On 3.14, process info starts off at 25fps then goes to 50fps after a couple of seconds, but the output is always 50fps and there’s no glitch. On 4.9, process info reports 25fps all the time, which is correct - it’s reporting the input format not the output.

I have no problem with 23.9fps or 29.9fps VC-1 but I don’t have any 50i VC-1s to test.

Yes, h264 1080 50i may be ok in terms of judder, though have had the odd sad face on 4.9.

I could PM you links to 1080 50i and 59.94 VC-1 material if helpful. Won’t be until evening UK time. I have 59.94 VC-1 that gives corrupt playback on the Vero under 3.14 but plays perfectly on OSMC and LE Pi’s (they have VC-1 keys installed).

I am getting an EDID with 3.14. Here’s the output on the 3.14 kernel:

Rx Brand Name: VIZ
Rx Product Name: SII
Manufacture Week: 18
Manufacture Year: 2003
Physical size(cm): 93 x 52
EDID Version: 1.3
EDID block number: 0x1
blk0 chksum: 0x96
Source Physical Address[a.b.c.d]:
YCC support 0x03, VIC (native 16):
ColorDeepSupport 0xa8 10/12/16/Y444 0/1/0/1
16 4 1 3 5 32 21 18 19 20 31 
Audio {format, channel, freq, cce}
{7, 5, 0x1f, 0x00}
Speaker Allocation: 0x0f
Vendor: 0x000c03
MaxTMDSClock1 225 MHz
RR_Cap: 0
LTE_340M_Scramble: 0
checkvalue: 0x962d0000

I’m still getting a problem with YouTube videos where the video appears to pause but the sound keeps playing; after a few seconds the video skips to catch up with the sound and restarts.

Logs: https://paste.osmc.tv/hiwejelaqu

I also got a sad-face error when I stopped the video playing - hope that didn’t scramble the logs.

EDIT: I find the video in the YouTube app on my phone, then play it on the Vero 4K+ by “sharing” it to Yatse. The specific video I was playing was this one: https://youtu.be/L_PLmJeGPLM but it happens on many others too.

Another thing I’ve noticed since first installing 4.9 is that my Kodi Callbacks add-on doesn’t seem to work so well any more.

A little background: an ongoing problem that I have is that if exports on a NAS (in my case a Windows 10 PC) are accessed via autofs, there’s no obvious way to have Kodi send the server a WOL packet if the server has gone into sleep mode. (Since the remote export looks to Kodi just like a local folder). My work-around is to install Kodi Callbacks, set up a task which runs the WOL function, and then an event which fires whenever there is activity after 1 or more seconds of idling - so, for practical purposes, it sends a WOL packet to the server every time I press a button, which keeps the server awake.

This used to work fairly well under 3.14, but since I first installed a 4.9 test build, it has been rather flakey, and the event seems to have stopped firing almost entirely now.

The logs in my previous post would probably cover this as well.

Mysterious issue today.

Playing a 3D MKV file. It keeps spontaneously stopping - not at exactly the same place each time but usually within the first minute.

I tried playing the file using an autofs mount and it played perfectly! It’s only when playing it via a Kodi-level NFS source that it keeps crashing.

Logs: https://paste.osmc.tv/yiginuxuko

Does it stop if you play it immediately after a reboot?

I rebooted twice before capturing the logs, so yes.

@grahamh here’s the MediaInfo for the file, in case it’s relevant:

Unique ID                                : 36090376064433543089764700574891972015 (0x1B26C0EBB617443097C65B40C61D15AF)
Complete name                            : E:\Video\Film Emergency Storage\Everest.3D.mkv
Format                                   : Matroska
Format version                           : Version 2
File size                                : 32.8 GiB
Duration                                 : 2 h 1 min
Overall bit rate mode                    : Variable
Overall bit rate                         : 38.8 Mb/s
Movie name                               : Everest 3D
Encoded date                             : UTC 2020-02-01 22:14:31
Writing application                      : MakeMKV v1.14.7 win(x64-release)
Writing library                          : libmakemkv v1.14.7 (1.3.5/1.4.7) win(x64-release)

ID                                       : 1
ID in the original source medium         : 4113 (0x1011)
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : Stereo High@L4.1 / High@L4.1
MultiView_Count                          : 2
MultiView_Layout                         : Both Eyes laced in one block (left eye first)
Format settings                          : CABAC / 3 Ref Frames
Format settings, CABAC                   : Yes
Format settings, Reference frames        : 3 frames
Codec ID                                 : V_MPEG4/ISO/AVC
Duration                                 : 2 h 1 min
Bit rate mode                            : Variable
Bit rate                                 : 33.2 Mb/s
Maximum bit rate                         : 31.0 Mb/s
Width                                    : 1 920 pixels
Height                                   : 1 080 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 23.976 (24000/1001) FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.668
Stream size                              : 28.1 GiB (86%)
Language                                 : English
Default                                  : No
Forced                                   : No
Original source medium                   : Blu-ray

Audio #1
ID                                       : 2
ID in the original source medium         : 4352 (0x1100)
Format                                   : MLP FBA 16-ch
Format/Info                              : Meridian Lossless Packing FBA with 16-channel presentation
Commercial name                          : Dolby TrueHD with Dolby Atmos
Codec ID                                 : A_TRUEHD
Duration                                 : 2 h 1 min
Bit rate mode                            : Variable
Bit rate                                 : 4 887 kb/s
Maximum bit rate                         : 8 922 kb/s
Channel(s)                               : 8 channels
Channel layout                           : L R C LFE Ls Rs Lb Rb
Sampling rate                            : 48.0 kHz
Frame rate                               : 1 200.000 FPS (40 SPF)
Bit depth                                : 24 bits
Compression mode                         : Lossless
Stream size                              : 4.14 GiB (13%)
Title                                    : Surround 7.1
Language                                 : English
Default                                  : Yes
Forced                                   : No
Original source medium                   : Blu-ray
Number of dynamic objects                : 11
Bed channel count                        : 1 channel
Bed channel configuration                : LFE

Audio #2
ID                                       : 3
ID in the original source medium         : 4352 (0x1100)
Format                                   : AC-3
Format/Info                              : Audio Coding 3
Commercial name                          : Dolby Digital
Codec ID                                 : A_AC3
Duration                                 : 2 h 1 min
Bit rate mode                            : Constant
Bit rate                                 : 640 kb/s
Channel(s)                               : 6 channels
Channel layout                           : L R C LFE Ls Rs
Sampling rate                            : 48.0 kHz
Frame rate                               : 31.250 FPS (1536 SPF)
Compression mode                         : Lossy
Stream size                              : 555 MiB (2%)
Title                                    : Surround 5.1
Language                                 : English
Service kind                             : Complete Main
Default                                  : No
Forced                                   : No
Original source medium                   : Blu-ray

ID                                       : 4
ID in the original source medium         : 4608 (0x1200)
Format                                   : PGS
Codec ID                                 : S_HDMV/PGS
Codec ID/Info                            : Picture based subtitle format used on BDs/HD-DVDs
Duration                                 : 1 h 50 min
Bit rate                                 : 42.8 kb/s
Count of elements                        : 3606
Stream size                              : 33.7 MiB (0%)
Language                                 : English
Default                                  : Yes
Forced                                   : No
3d-plane                                 : 0
Original source medium                   : Blu-ray

00:00:00.000                             : en:Chapter 01
00:05:12.145                             : en:Chapter 02
00:09:36.075                             : en:Chapter 03
00:15:13.162                             : en:Chapter 04
00:20:58.423                             : en:Chapter 05
00:26:30.714                             : en:Chapter 06
00:33:15.118                             : en:Chapter 07
00:40:23.754                             : en:Chapter 08
00:47:23.382                             : en:Chapter 09
00:52:14.589                             : en:Chapter 10
00:57:49.174                             : en:Chapter 11
01:01:54.794                             : en:Chapter 12
01:07:22.079                             : en:Chapter 13
01:15:40.577                             : en:Chapter 14
01:21:03.900                             : en:Chapter 15
01:26:59.589                             : en:Chapter 16
01:32:39.136                             : en:Chapter 17
01:41:20.449                             : en:Chapter 18
01:46:47.651                             : en:Chapter 19
01:54:06.464                             : en:Chapter 20

Is it better with: sudo apt-get install --reinstall vero3-libamcodec-osmc=1.2.0-3

Assuming that was addressed to me and that you’re referring to the issue of my 3D movie stopping itself prematurely - no, no change, I’m afraid.

Something I just noticed is my Vero is not transcoding to AC3 as it usually does.
My Vero is connected to my samsung 4k tv direct via HDMI and I use spidf out to my external amp (no hdmi on amp)
Usually anything in dts is transcoded to ac3.
The log shows a movie with aac played first. Sound works but not in ac3 (I think this may have been previous behaviuor as well)
Next movie is ac3 5.1 and plays correctly.
Next is DTS 5.1 and I only get silence.



Sorry. Please disregard. Discovered dts-hd was activated in vero settings. Not sure how. Might have been one of the kids. Apologies

When I install this 4.9 release, can I just update to 4.9 final once it is there or will I have to reinstall the Vero 4K+ again to get the final?

You should be able to update from here to the stable 4.9 when it is released. You just would need to reinstall if you want to fall back to 3.14.

Anyhow suggest to have an up to date backup as always something could go wrong with a testing version

I don’t really care if my library has to be rebuilt. Do you mean a backup of Kodi, or really a backup of OSMC when the Vero seems bricked? I don’t know how to make a backup of OSMC tbh…

Normally a backup of Kodi is good enough unless you have heavy customization on the operating system side. But yes if you get into a problem with Kernel a full reinstall (via USB/SD Card might be necessary.

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The 5th April update has fixed the resolution issue with my Panny soundbar, thanks for that.

Interlaced VC-1 still seems to be broken with bad motion judder. And when connected to my Marantz AVR I still get occasional blank screen issues, but that’s not specific to 4.9.

Has anyone tried to see if HDR with the Youtube plugin finally works with the new kernel?

Just curious as I’m still running the old version :grinning: