Posts by Freestyler

Quote from noggin

If you have a 7.1 speaker set-up - you want 7.1 not 2.0 enabled in your sound settings.

Also if you want DTS HD MA and Dolby True HD to be losslessly decoded, you will need to disable DD and DTS passthrough, as otherwise I think it will bitstream passthrough the lossy DD/DTS core/secondary streams rather than decode the lossless DTS HD MA or Dolby True HD losslessly to PCM 5.1/7.1.

You won't get Atmos until HD Audio bitstreaming/passthrough is supported on the Pi 4B - PCM lossless decode is only for Dolby True HD and DTS HD MA - not Dolby True HD with Atmos or DTS:x. (You may - possibly - get DD+ with Atmos - but that's not intentional and usually only used for secondary language audio streams on BD/UHD BD)

If you must have Dolby True HD with Atmos, the Pi 4B isn't currently for you.

However if you want the best quality audio possible with a Pi 4B currently - disable passthrough, configure for 7.1 if you have 7.1 speakers (i.e. Front R,L, Centre, Side R, L and Rear R, L + Sub) or 5.1 if you have 5.1 speakers (note I'm ignoring 7.1.2. or 5.1.2 Atmos in this - if you have 7 speakers but 5.1.2 then configure for 5.1, if you have 9 speakers in 7.1.2 then configure for 7.1)

Hi,

thanks for answer. I always had enabled audio passthrough and wanted to do all decoding in my receiver.

So passthrough isn't supported at all?

Is there any time window when it will be supported?

Thanks.

Quote from noggin

DTS HD Master Audio is losslessly decoded to PCM 5.1/7.1 (and the Pi4B supports 192k/24bit at 5.1/7.1 and isn't limited to 4.0 at 192k as previous models are, I believe) - so it's only Atmos that your Home Theatre is crying for? (Or is stream metadata vital for your use case??)

Hi, I tried to play something in DTS HD MA and i got it decoded to 5.1, but i got 7.1. Dolby Atmos Home Cinema. When i play something in Atmos it is decoded to weird formats like 3.1 Theatre Dimensional.

My settings in audio are 2.0., enable passthrough and enabled formats under it like DTS, AC3 and E-AC3. This works for DTS-HD MA in most of the time. Weird thing is when i set 7.1 in audio setting I got a 5.1.2 sound in output which should be right, but my receiver getting no Atmos (there is a LED which should be lit if Atmos is detected (working in old box S905x).

Hi,

I haven't tested it yet, but big thumb up for no tearing GUI, if it's true.

Did someone tested if HBR audio is fully supported (DTS HD MA and Dolby Atmos)?. That's what I want so bad on my RPi4. My home theatre just crying.

Hi,

I'm still missing full HBR audio support for RPi4. DTS HD MA is detected just like DTS and in option of Kodi there is no option to turn on DTS HD MA. On S905X box it worked just fine. But I think that this is because of old kernel, I'm right?

In new version I see smoother UI and Kodi itself, that's good.

Quote from Selwro

Update. I did this and sure enough the 4k 60hz modes appeared. Thanks again.

Hi I didn't enabled this option in config.txt and I was able to play 4k HEVC movie anyway. Is that possible? Now i tried enable this option and only difference is, that I can put Kodi interface to 4k 60fps mode, previously I could use just 4k 30fps.

I'm doing it right: I opened SD card on my computer, opened config.txt file and added line hdmi_enable_4k=1.

But i'm surprised, that 4k worked without this line.

Thanks

Quote from Adr3nal1n

Some further feedback on idle temps,

RPI4 2GB idling in official case: 70c (room temp 20c)

RPI4 2GB idling with top half of official case removed: 61c (room temp 20c)

RPI4 2GB idling with top half of official case removed and new firmware applied: 58c (room temp 20c)

I installed the new firmware from here: Raspberry Pi 4 temperature - Page 4 - Raspberry Pi Forums

Going forwards, I plan to remove the official case and instead use a Pibow Coupe case with passive heatsink installed. Ninja Pibow Coupé 4 (Raspberry Pi 4 only) – Pimoroni

Hope this feedback helps.

Display More

Hi i did a lot of testing and playing with temps, used various cases and added heatsink, you can see it in post #96. Link below. It should be repaired in new firmwares, but active cooling should help a lot too. I'm waiting for my reseler when he will have coolers I will test it with custom case.

LibreELEC (Leia) 9.2 ALPHA1 with Raspberry Pi 4B Support

I did some testing on internet speed, results below. I'm on backbone gigabit optical network. Raspberry and my PC are connected to the same router and network.

Multiple tests on Raspberry

https://imgur.com/a/od6tvzj

Test from my PC

8374194777.png?fbclid=iwar2hok7pscqvlhsluc_obq1xx8bm2vr1huj8dyogybpkixurveu_gsgi76w

Quote from dersascha

Hi guys i am at the lates aplpha on my Raspberry Pi 4 4GB but i notice some screen Tearing when i am in the settings or so. is a known probleme and maybe a fix for it?

Hi, yes it's a known problem and it's mentioned in this thread on page three.

Quote from Adr3nal1n

Thank you so much Popcornmix, this fixes the issues I was having with frame skipping/stuttering during 24p/24Hz/23.976 (whatever you want to call it) playback on 720p/1080p x264 and HEVC content. Playback is now smooth at all times including scenes of camera panning. (I don't have a 4K TV so cannot verify 4K playback)

Thanks again!

Well like I said before, 4k performance with high bitrate it's still choppy.

Quote from popcornmix

For the stuttering reports there is a fix. Either wait for the next LE update or grab firmware from here:

start4.elf?raw=true

fixup4.dat?raw=true

rename and replace http://start.elf/fixup.dat on the FAT partition of sdcard.

Tried that, still the same. If bitrate of movie is higher it still stuttering and if are any fast movements in movie it's laggy and not fluent. In lower bitrate movies it's ok and temperatures are lower.

So I tried to set up buffermode and memorysize and nothing happend. Still the same problem. You can see it on attached video how really bad it is.

My NAS has enabled NFS, I added NAS to Kodi file list and tried to play some video on my NAS. And this is not 4k, it's just video from my GoPro in 2,7k.

https://imgur.com/a/oxguvq3

Quote from dickon

I've never had much luck with the Kodi userland NFS client in LE, and NFS mount storage with an autostart.sh:

Bash

#!/bin/sh
(
sleep 10
mount -t nfs -overs=3,nolock 172.29.23.203:/pond/tv /storage/videos/newwatcher
mount -t nfs -overs=3,nolock 172.29.23.203:/pond/video/film /storage/videos/film
[... etc. ...]
) &

Yeah, it's pretty grotty, but it does the job. The sleep is long enough for the network to come up. This works on the Pi4 and the Khadas Vim. Couple that with a .kodi/userdata/advancedsettings.xml:

Code

<advancedsettings>
  <cache>
    <buffermode>1</buffermode>
    <memorysize>1610612736</memorysize>
    <readfactor>10</readfactor>
  </cache>
</advancedsettings>

and it all works.

Thanks, i will try to set memorysize and buffermode and see if it helps.

Quote from milhouse

Just trying to rule out possible causes in an effort to identify what is happening.

As it happens, there should be a fix for the "washed out" videos in the next release as MMAL required some extra support for the Rec2020 colour space that had been omitted. It would still be very nice if someone could upload a test sample or provide a link to a file that demonstrates the problem so we can fix it at the first attempt.

Also, stuttering issues with interlaced videos should be fixed in the next release.

Hi,

I had some time yesterday and tested 4k in RPi 4 in two boxes made on 3D printer, official box from PI Foundation and unboxed. I also used a camera thermometer and the temps are really bad. Screens and video footage from 4k movie is below. The stuttering and freezing will start after the CPU have above 75°C, which is after 10 minutes of 4k playing.

Movie Info

Washed out colors

RPi in official box after 10 minutes of playing 4k movie

RPI in official box, 10 minutes in idle

RPI in official box after 10 minutes of 4k movie

RPI unboxed in idle

RPI unboxed after 10 minutes playing 4k movie

Video of stuttering

Quote from jorgito

Hi,

I just got a RPi4 (version 2GB) and after installing and booting up, in hte homescreen Kodi just freezes. Any special configuration I should do?

It should'nt be. Just download image from website, put it to your SD card (for example via Etcher), put SD card back to RPi and LibreELEC should install. Then you can use Kodi.

So I tested 4K HEVC video and it's working almost properly. But i must say I have washed out color too (like someone sad before me). Changing option "Limited color range" doesn't work and make things worse. I would say it looks like very bad HDR. I'm using original HDMI cable from PI Foundation (HDMI to micro HDMI). My Samsung TV has HDMI port set to HDMI UHD color (didn't try turn it off yet (but again with S905X it worked fine).

Sometimes I get delayed audio, but that could be a source issue.

Real pain is reading from my NAS via ethernet. It's connected via gigabit network and when I try to play even 2,7k it can't buffer enough and stutter a lot. I must say that via TV (which is connected just with 100M) and my old S905X (again 100M) android box it's working fine, so it must be RPi4 or LE issue.

Next thing is, do you guys have same problem with overheating like me? The RPi 4 is really hot and I used passive cooler to CPU which helped just a bit. It says CPU temperature 80°C and I'm just sitting in menu. I can't realize playing 2 hours of 4k movie, after that will RPi 4 burn through my furniture :).

Quote from milhouse

I don't think the hardware will support 4K H264 decode. It's more likely that 4K videos will be HEVC.

Initially DTS HD-MA should work same as RPi3B, ie. LPCM, but HBR audio support is planned for the future which is when Atmos should work too.

Thanks. One last question about Atmos. It's matter of days or weeks?

Quote from milhouse

Were these h264 or HEVC 4K videos? 4K video playback is HEVC only.

From the announcement post:

* HEVC decode to 4K@60 (with HDR)

* H.264 decode to 1080p@60

If these were HEVC 4K videos, can you post the media info?

I will check it when i get back to home, because I'm not sure. Anyway, it's a chance to get 4k h264 video in future?

How about that audio? Should Dolby Atmos and DTS HD MA now work properly?

Thanks.

Quote from milhouse

To be totally honest I have found the RPi4 version of LibreELEC 9.2 to be entirely usable, and stable. I'm confident the more obvious issues will be addressed quickly.

Yesterday I tried to play few movies in Kodi in 4k - results are not good, stuttering, freezing etc.

Dolby Atmos and DTS HD MA not worked only DD 5.1 (yes i had enabled passthrough and Dolby Atmos and DTS HD MA capable receiver, this option worked with my S905X).