Posts by elim_garak

I've read comments from people saying they can play AV1 media on their rpi4 (no LE, just raspbian) while others say they are choppy.

I'm using LE 11 and I'm one of the later ones. On slow scenes you can see it drags, while on fast action scenes you can definitely see the jumps.

I've noticed that there have been recent improvements in the AV1 decoder dav1d with latest 1.5.0 even saying "Optimize Armv8.0 NEON"

And LE HEAD has been updated to use that latest version https://github.com/LibreELEC/Libr…av1d/package.mk

What I'd like to know is if anyone running nightly LE12 (note LE 12.0.1 doesn't have latest dav1d) can play 1080p AV1 smoothly?

Is there hope for the RPi4 or should I just stop dreaming and move on to the RPi5?

For AV1 video samples:

http://download.opencontent.netflix.com.s3.amazonaws.com/AV1/Sparks/Spa…80-2194kbps.mp4 (slow scene)

https://test-videos.co.uk/vids/sintel/mp…080_10s_2MB.mp4 (fast scene)

https://test-videos.co.uk/vids/sintel/mp…080_10s_5MB.mp4 (fast scene)

more bitrates on https://test-videos.co.uk/sintel/mp4-av1

Thanks

Hi

I updated LE to LibreELEC-RPi4.arm-11.0-nightly-20230816-1d807c8.img.gz and it fixed the problem!

Thank you for the help and for LE

Quote from Da Flex

10 / 12 bit deinterlacing is a know issue. As a workaround, disable deinterlacing at playback menu (gear icon).

I tried that but it didn't make a difference.

Quote from popcornmix

Can you try a nightly build? That has improvements for handling unusual pixel formats (like more than 8-bits/pixel).

I've downloaded LibreELEC-RPi4.arm-11.0-nightly-20230809-ecf5de7.img.gz and will give it a go in the next few days.

Thanks for the help.

Hi

I'm having image corruption in the form of blocks of pixels when playing 10bit videos on RPi4 LE11

Playback works fine in Kodi on my laptop, so it's not the video file nor kodi.

On RPi4 LE11 this plays without any issues:

Stream #0:0: Video: h264 (High), yuv420p(tv, bt709/unknown/unknown, progressive), 1280x720 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc

On RPi4 LE11 this plays with corrupted pixel blocks:

Stream #0:0: Video: h264 (High 10), yuv420p10le(progressive), 1280x720 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc

There is no slowdown or lag or anything. It's just that the image decoding gets corrupted.

Thank you for any help.

Found this thread by chance and got genuinely curious,

Which use cases do you see for Docker here?

I mean LE is aimed at running kodi. It's its sole purpose.

The only thing I can think of is a torrent client, but then you have kodi competing for CPU and maybe not getting enough.

Hi

I'm new to the Pi way of life and just installed LibreElec on a brand new Pi 4 with 4 GB of RAM.

I'm experiencing some mild stuttering and time slowdown effect when playing some more demanding files.

From Kodi's OSD codec info I could see the following:

- for a 1080p 60fps x264 encoded video I'm getting around 10 frame skips per minute. Example http://distribution.bbb3d.renderfarming.net/video/mp4/bbb_…0fps_normal.mp4

- for a 2160p 60fps x265 encoded video I'm getting hundreds of frame drops per minute. Example http://jell.yfish.us/media/jellyfis…-hevc-10bit.mkv

(I removed the http:// from the links to avoid embedding)

The CPU load always stays under 20%

I'm running LibreElec 9.2.5 with Pi Firmware 2020.09.03

Is this normal or do I need to tweak anything?

The other issue is that I'm not 100% sure Kodi is playing the videos at 60Hz.

I've updated my `config.txt` to include the line `hdmi_enable_4kp60=1` and I can choose a 4k resolution with a 60hz refresh rate from the settings in Raspbian.

When I boot to LibreElec I'm only able to select 4k at 30hz. But I believe that only applies to the UI.

If I ssh to LE while playing a video I can see that the preferred mode is still 4k60p by running `tvservice -d /tmp/eid.dat && edidparser /tmp/eid.dat`

> HDMI0:EDID preferred mode remained as CEA (97) 3840x2160p @ 60 Hz

But `tvservice -s` will say

> state 0xa [HDMI CUSTOM RGB lim 16:9], 3840x2160 @ 30.00Hz, progressive

So I'm not 100% sure video playback is happening at 60Hz.

Thanks