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

Can you give me a time stamp quick? I’m sitting at my projector so…

No idea, I’m afraid. I don’t have the whole movie any more - I just cut two minutes out as a standard test clip.

Ok gimme a minute and I’ll try to find it. It’s at the stadium you said? Any more details appreciated.

Yeah, the actual show with the singers and the fireworks. Start with the three singers walking out in front of the soldiers and end with the short fight/scuffle a little later.

Ok trying to find it…

Thanks Grahamh - what will this do exactly? (and how would I reverse this when I get an HD fury )

The command will only take affect for the one boot.
So if you reboot, it will not be persistent.

I’m in the stadium where they’re all playing with the balls and Steve Martin comes out. Is there another stadium scene?

What it does is makes vero send an HDR stream even if it thinks the display is SDR only.

My Yamaha doesn’t tell vero my Panasonic TV has HDR but it does let HDR infoframes through from vero to TV.

YMMV.

OK, this did work for the brightness of the picture, but it was probably overbright and the colours were still badly washed out. not nice to watch.
I also tried turning off HDR support on the TV and that made no difference to the signal broadcast to it.
It’s ok though, I know it’s my hardware limitation and nothing the Vero can fix. Ultimately, the solution for me would be forcing the Vero to output the HDR media as SDR, both brightness levels and colour saturation. No idea if it can or you’re working towards this or anything.

I think I found it. Toward the end of the movie. No frame rate issues at all that I can see, but without a time stamp and repeatability I don’t know really…

The three lady singers have a song about “Can you make me lose my breath?” And there are lots of fireworks.

It was skipping like crazy for me earlier today - lost 300 frames in 2 minutes.

If vero thinks your display doesn’t do HDR it will convert to SDR by default. Here, that gives me typically darker and more saturated colours than if watching with HDR but it varies by film.

What we have started work on is user controls for how that HDR-SDR conversion is done.

For me, always darker with badly washed out colours with any of my HDR material: EOT, john wick 2, captain marvel. Captain marvel has terrible banding too.

Did you have the codec info stuff up? I’ve found (at least historically) that having that overlay up actually CAUSED the frame drops on Billy Lynn. Closing that overlay solved the issue for me. I’ll check again though in a moment for that song. But I’d notice 300 frames lost in 2 minutes with my eyes closed. Ask Sam. I see a frame drop/skip and lose my mind.

So what I mean is having that frame skip/drop overlay up was causing the issues. I too could see the skips/drops counting up until I closed it.

Only at the end of the scene with the video paused, to see how many frames had been skipped prior to bringing it up.

Hmm. Ok. I’ll check again and report back in a few.

Tell me about it.

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Ok so that scene (I found it ~1 hour 8 mins) is apparently causing issues because of the strobe lighting effects during the scuffle. After that scuffle the frame rate returns to normal. It’s not consistent from replay to replay of this scene but yep - this one is tripping up the system. One replay I had the sound go out of sync, too.

In addition, as I mentioned earlier if you have the frame skip/drop overlay up the frame rate issues are even worse.

With all the effects and craziness, this scene looks like a worst-case scenario, too.

From the sounds of it, it’s probably a bitrate spike.
Similar effects used to occur with the HBO noise logo on the start of a program.

I’ve got an idea for what will fix it.