Posts by HiassofT

Youtube uses the VP9 video codec for 4k videos which the RPi4 can't decode in hardware - and software decode is way too slow. So 4k youtube won't work on RPi4 (unless you are satisfied with seeing a slideshow).

so long,

Hias

You have to enable MPEG-DASH support in Youtube addon settings and set Video quality to 1080p (also in the MPEG-DASH tab). With these settings 1080p is working fine here on my RPi4.

so long,

Hias

Enabling "HDMI ULTRA HD Deep Color" is recommended as that'll make it possible to drive the display with 4kp60 (without it it'll be limited to 4kp30 on the RPi4). Other than that it doesn't make a difference for now.

I meant checking the picture settings (i.e. where you can select picture mode, brightness, contrast etc).

If the difference for non-4k videos is minor these settings are probably fine.

I still suspect you are playing HDR 4k videos (eg HDR10, HLG or DolbyVision). In that case the difference will be indeed huge as RPi/Kodi can't currently output HDR. This means the maximum brightness, contrast etc will be far lower than if you play these natively on your TV.

BTW: if you play HDR videos on your TV you may also notice a "DolbyVision" or similar popup and a change of available picture modes in the TV's settings.

Basic support for HDR output has just landed in the Linux kernel and there are still quite some bits missing (in RPi video driver and Kodi) until HDR will be supported.

so long,

Hias

Sep 10 is still the latest official firmware. If you want to use / test the beta firmware you have to download it manually from here rpi-eeprom/firmware/beta at master · raspberrypi/rpi-eeprom · GitHub

You can use rpi-eeprom-config / rpi-eeprom update as outlined above - at your own risk, as usual for beta stuff.

I've been using the beta firmwares for a while now (mainly to test network booting) and in general they worked quite well.

so long,

Hias

Actually it's not the OS crashing and rebooting, it's kodi crashing and the OS (LibreELEC) automatically restarting it.

And while I agree that an application crash isn't the nicest way to handle a corrupted file there's not much we can do about it ATM. So far we only know that it's crashing with some (probably not quite legal) file and maybe with some unknown kodi samples.

So, to be able to move forward with this we need a sample file so we can reproduce and analyze the issue.

so long,

Hias

Quote from Exitras

Jup, my 1gb version is making many problems (even though I never reached the limit of 1gb). Luckily I have a 4gb version which I could use for testing. But I still wonder why this happens...

Can you test if reducing CMA to 64M (or 128M) helps on your 1GB RPi4? Reducing GPU memory may also be worth a try. See here for details RPI4 on Libreelec 9.1.502 thumbnail/pictures problems

so long,

Hias

Quote from harun-cuk17

But you said 4k with hyperion is not working in othet post?

Yes, that's right, when I tested a couple of months ago I got "no signal" with the 4k samples I tested with. These were mostly 4kp50/60 files though.

I recently re-tested with the 4kp24 Interstellar trailer and noticed that did work.

Not sure if all 4kp24 videos will work - I only have a few 4k files here - but I'd say it's worth a try to check.

so long,

Hias

1080p50 and 2160p24 are working fine here with hyperion active.

so long,

Hias

Check the picture settings of your TV, they can be adjusted separately for built-in players and each HDMI port - and there are separate picture settings for SDR and HDR.

I've got a 55C8 here and when using the (usually recommended) ISF Expert Dark Room profile (set up with identical parameters for HDMI port and internal player) for SDR videos I don't see really a difference between RPi4 output and internal player.

Edit: also make sure that you're not comparing HDR videos on the internal player with SDR from RPi4 (it doesn't support HDR output yet).

so long,

Hias

Quote from csaba

It also occurs with sample files referenced on the KODI page: Samples - Official Kodi Wiki

LibreELEC on RPI4 is still beta, so problems are expected. I hope they will be fixed eventually. I don't give up hope.

Can you please tell us which sample files cause issues?

If you have an Ubuntu Linux PC or a Windows PC it might be worth checking if the issue occurs with official Kodi builds as well - that'd help us narrow the issue down.

so long,

Hias

Quote from bite_your_idols

HiassofT any clue about subtitles issue I commented before?

If I can help with any kind of test please let me know.

Sorry, no idea ATM.

I tried to reproduce it yesterday but wasn't really successful.

With hdmi_enable_4kp60=1 in config.txt I got working output both with subtitles on and off (played Disenchantment S02E01, screen running at 1080p24) and without hdmi_enable_4kp60=1 in config.txt I got occasional black screens, no matter if I enabled subtitles or not (same episode, same resolution/refreshrate).

so long,

Hias

Quote from harun-cuk17

thnx but that means all the 4k content on kodi will be 1080?

And hyperion works with this method?

If we cannot watch 4k then why we should upgrade?

A quick test showed that 4kp24 content (tested with Interstellar-divx-hevc-uhd-51ch-4K.mkv) played fine with hyperion active (both at 4k and HD output at 24Hz), but 4kp60 seems to be too much (both at HD and 4k output). So, sorry, reducing the output resolution doesn't seem to help.

If you want something that plays all 4k content with hyperion active then ATM the RPi4 is not the right choice for you. It probably will get fixed at some point but as posted numerous times there's no ETA for the fix.

so long,

Hias

Quote from harun-cuk17

so where will I find the whitelist then to make the change?

many thanks

Settings->System->Display, you need to set settings level to expert.

so long,

Hias

I found out why the alsa_usb lirc driver was missing and PR'ed a fix for that lirc: add dependency on alsa-lib by HiassofT · Pull Request #4046 · LibreELEC/LibreELEC.tv · GitHub

If testing goes fine it'll be included in the next LibreELEC release.

so long,

Hias

It doesn't matter much if you enable passthrough (so your AV receiver decodes the AC3/DTS signal) or disable passthrough and set the number of channels to 5.1 (then the RPi decodes the AC3/DTS signal).

Passthrough can be useful for the high quality TrueHD/Atmos/... formats (which can't be decoded in software but might be supported by the AV receiver), but ATM the RPi4 doesn't support passtrhough of these formats (that should come some time in the future, though).

so long,

Hias

Yes. IIRC Sync playback to display will break audio passthrough so just use Adjust display refresh rate. Kodi will then switch refreshrate and resolution (as configured in the whitelist) to match the video.

BTW: if you set up the whitelist better don't enable the 25/29.97/30Hz modes as that'll cause issues with interlaced content (kodi doesn't detect interlaced right and then tries to use eg 30Hz for 60Hz interlaced...)

so long,

Hias

Quote from siz

where can I disable MMAL?

Settings->Player->Videos - you need to change the settings level to Expert (otherwise that option is hidden).

so long,

Hias

Ah, sorry, scratch what I just wrote, this won't work. Just noticed we don't build the alsa_usb driver/plugin for lirc.

so long,

Hias