Raspberry Pi Forums

This is reproducible every time. The last video that I have tried is also available publicly. I do not know exactly for how long the video was playing but it must be over 3-4 hours, maybe more. Usually I leave them playing overnight. Okay - I have video and can run it in a loop. I'll leave it runni...

After the first report I performed all the following tests on a new Raspbian Buster Lite installation with the default /boot/config.txt and /boot/cmdline.txt files, and without any custom configurations. So you haven't updated to the testing version described in the first post of this thread? This ...

jcontagious wrote: ↑
Thu Dec 05, 2019 3:03 pm
After some time the GPU seems frozen, tvservice -s never returns.

Does this happen every time you try to play this file? (after a reboot)
Can you play any other files?

Latest rpi-update firmware contains a potential fix for the lens shading issue.

There is an update to VLC. Hopefully it fixes subtitle positioning when running in fullscreen mode. It also enables the AV1 decoder (libdav1d) which may be of interest. It is only software decode. I have been able to play some 8-bit 720p AV1 streams on a Pi4. 10-bit streams are harder and will proba...

RossDv8 wrote: ↑
Fri Nov 29, 2019 6:37 am
I gather from the reply that there are no optimal settings in VLC Preferences to select a codec to play 4k. It is all Auto.

We believe default settings are generally optimal.

Oh, and if you're connecting from a machine with X installed -- OS X and any amd64 Linux of your choice, for example -- ensure $DISPLAY is unset on the Pi before starting vlc. I think that is no longer necessary with latest (yesterday?) update. For some reason launching from ssh without DISPLAY=:0 ...

Can you post mediainfo of the file (you can apt install mediainfo)

dandan21 wrote: ↑
Thu Nov 28, 2019 6:54 am
Adding cma=512M finally made it possible to see non 4k movies (i could not do that either before).
4k movies still stutter a lot.

In a window or fullscreen? Windowed playback of 4K will always be worse than fullscreen.

dandan21 wrote: ↑
Wed Nov 27, 2019 8:10 am
This time i get black screen when playing the video...

Did you set cma=512M in cmdline.txt?
Can you post mediainfo of the file (you can apt install mediainfo)

dandan21 wrote: ↑
Tue Nov 26, 2019 9:49 pm
Is this a knows problem with 4K and vlc or a local problem for me?

HW decode in VLC is something new and has been continuously worked on for several weeks.
There are numerous bug fixes and performance improvements in the testing version that aren't in apt yet.

There is an updated version out for testing. You could give that a try:
https://www.raspberrypi.org/forums/view ... 9&t=257395

Both figures are correct - there will be a reason why the 64-bit kernel can see less usable memory. I will leave someone who knows to comment on why. It is obviously something to do with some memory being needed by the GPU. I also seem to remember there's also 16MB of memory that needed some specia...

What other permutations would be helpful for testing, if any? There is a pretty large testing space for this: software decode vs hardware decode (e.g. h264) gpu accelerated hevc (pi2/3) vs hardware accelerated hevc (pi4) 8 bit vs 10 bit different audio/video codecs different subtitle formats networ...

I just installed it after adding the source and doing the update/dist-upgrade. Tried https://www.youtube.com/watch?v=d6a3uRVE7gE on a 100mbps network that delivers 85-95mbps, but used Pi 4 WiFi on 5GHz, so only getting around 60mbps. This thread is about VLC - playing youtube videos through chromiu...

andrum99 wrote: ↑
Sat Nov 23, 2019 3:38 pm
Thanks - these are all interesting details. I saw someone mention that argon/rpivid was developed by Raspberry Pi - is that right? Would that be using RISC-V stuff?

The hevc codec is hardware controlled by the main arm cores. No RISC-V.

rpi-update contains the ethernet led fix

andrum99 wrote: ↑
Fri Nov 22, 2019 4:14 pm
Hi @dom. Can you confirm that the HEVC decoder on Pi 4B is software? I believe it is running part on the GPU side, part on the ARMs - is that right?

No, it is fully hardware on Pi4. Pi2/3 uses a mixture of software and GPU acceleration.

Hmm. Can't get it to work. Ideas? This is on 4.19.84-v7l+ and 4.19.84-v8+, no X (no X installed), sshed in on console, and with a seriously nasty permissions bodge -- chmod -R a+rwX /dev -- to get a normal user enough permissions to talk to at least bits of the hardware. I've just checked and vlc d...

Would it not be safer to just disable dynamic voltage scaling if the user has specified an overvoltage? Overclocking is, by its very nature, pushing at the limits of what is possible, so anything which might negatively affect stability while doing so is a bad thing. Depends on the reason for the fa...

And, TBH, I wouldn't expect it to. I suspect the first 'cma=64M' parameter is being used, which is making the memory allocation fail. Unfortunately, I don't know where that's being set -- certainly not in my cmdline.txt -- and I don't know which module or what parameter that corresponds to to overr...

Lipown wrote: ↑
Thu Nov 21, 2019 4:51 pm
Edit: I needed to install beta to make it work however I not see controls neither the right click menu in fullscreen now. Any solution please?

GUI controls aren't available in full screen mode. Either use keyboard shortcuts (e.g. arrow keys for volume/seek), or toggle back to windowed ('F' key)

Lipown wrote: ↑
Thu Nov 21, 2019 3:03 pm
Does it now supports both HDMI on Rpi4?

On the command-line --mmal-display=hdmi-1 or hdmi-2
In preferences/video/fullscreen video device should give hdmi-1/hdmi-2 as options

We have an updated version of VLC which improves performance for video decode, including HEVC 4K video playback on Pi4. It is currently in the untested raspberry pi repo, and should be considered beta. If you would like to try it, edit /etc/apt/sources.list.d/raspi.list and add 'untested' to the lin...

Yes. See https://www.raspberrypi.org/forums/view ... 9&t=257394

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