Latest nightly - Strange video slowdowns?

Mine says rev a

Hi, my:
Amlogic S905X3 rev c
Serial: 2b0c10000124180000113334504d5050

I’m not sure if what I’m witnessing is the same thing.
I’m using vim3 and noticed usually at the beginning of videos there are a few short occasions of slowdowns (1-3 times maybe) and then it plays fine throughout. It’s maybe a second or less at a time.

Looks like you got a model with Turbo Lag :wink:

My N2 behaves like an electric super car :slight_smile:

:stuck_out_tongue:
Maybe it’s a slight network buffer issue. It only happens at around the beginning and is very brief.

Nope mine happens all the way through have to keep rewinding the video a few steps.

Never had it before.

@sramek76, do you have same issue on this box?
Or it’s just an output of command?

Just tried the dev issued by P, had slowdown within the first 2 mins, i just dont understand it, never had a single issue before.

Think i might bring in another box and test it.

You are not alone.

I have had the same issues with my S905X2 since the new kernel was implemented.

It is completely random and happens with both X264 and X265 files, although I have seen more instances with X264. The same content played when using stable build works perfectly.

The symptoms can also range from slowing down for a few seconds before resuming correctly to having to stop and start the playback to get back to normal. On some occasions skipping back and forward again can correct the issue but not always.

I’ve had all logging turned on and when it has happened, looked to see if there is any record of change in activity but there has never been anything shown for the noted times.

Recently there was one nightly where I went about 7 hours of varied playback before it started again and it can also occur once in a video to multiple times on another playback of the same video file.

There is also no occurrence of the issue on the nightlies for my S912, so it is definitely related to the new kernel in some way.

The next step for me is to try a completely fresh install with no addons etc installed just to rule out any possible conflict with something that may be running in the background due to other installations.

Your description is dead on, im gonna bring my other box in that is still on latest stable and test that, see what happens.

We have watched a lot of videos in the last few weeks, my wife Jill in the bedroom using S905X box me watching in the living room using N2.
720p, 1080p, UHD, UHD HDR files are stored on NAS.
Wired GB network
No slowdowns, no dropouts, nothing
Toughest test with the video Gemini Man -> UHD.HDR@60Hz
A very bad film in terms of content, but perfect for testing

We hear about slow downs only with Amlogic-ng, nightly. There was a huge Linux kernel bump from Amlogic since last stable. No tests are needed by 9.2.1 stable or Amlogic(not ng) devices as it is not comparable to nightly. The changes are too much.

What we see(I never have seen it here)/read it happen by using a AVR/Soundbar/passthrough/h264/h265/AAC setup. The error happens randomly so it looks like a threading issue. This is very hard to find and even impossible when no developer can reproduce it locally.

But we are still reading/searching the reason for this and hopefully solve it asap.
I will create a new test image today as we need to try everything if it may help or not.

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My N2 is running nightly using AVR Denon X3300 passthrough
Video:
20% h.264
80% h.265
Using all kind of audio tracks - aac, ac3, DTS, Atmos, TrueHD etc.

I´m watching videos a couple of hours every day
If I recognize slowdowns I will report but until now I never had this.
I don´t use dozens of addons

Sorry to put a slight spanner in the works but all of my audio comes directly via Bluetooth, no passthrough.

Well my reason for testing 9.2.1 stable on my other boxes was to rule out a hardware or config issue with my N2, infact i have 2 other boxes running stable.

Will give it a try but alot going on at present, will also try the new build when ready.

Here a test image based on current nightly status. Just a message if better/worse/same happen with this image is enough:
https://test.coreelec.org/Portisch/CoreELEC-Amlogic-ng.arm-9.2-devel-1585304580.tar

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Ok just watched BIRDBOX again, which is one that seemed to suffer from it.

So far all the way through and not one issue.

Ill try the walking dead s10 which was playing up to next.

Here a second test image:
https://test.coreelec.org/Portisch/CoreELEC-Amlogic-ng.arm-9.2-devel-1585324197.tar

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I’ve been testing CoreELEC-Amlogic-ng.arm-9.2-devel-1585304580 for a couple of hours now and all is OK so far but will report back after a more lengthy period before testing CoreELEC-Amlogic-ng.arm-9.2-devel-1585324197.

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After around 4 and a half hours of varied playback using 1585304580, during playback of a 720p X265 file there were 3 occurrences of around 2,4 and 10 seconds, although on each occasion things auto corrected.

I did notice a difference in the type of slowdown that was more a case of freeze frame and then resume after a couple of seconds, rather than a sort of slow motion processing.

Now to try 1585324197.

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