Posts by wyup

  • Anything better than a Pi4 currently?

    Quote from Da Flex

    It has to be conform to Dolby licensing conditions. If you find a legal hack, let us know.

    Libplacebo open source library, which is "provided by ffmpeg as a Vulkan-based video filter, does native support for Dolby Vision HDR, including Profile 5 conversion to HDR/PQ or SDR, reading DV side data, and reshaping. (BL only, currently"). RPi4 has Vulkan 1.2 and GL 3.0 compatibility.

    LE Wiki says:

    Kodi supports Dolby Vision under Android (if the device is licensed for it) but not Linux. Dolby requires manufacturers to license their Intellectual Property and use integration libraries to decode the HDR metadata. Until FFMpeg comes up with a "clean room" reverse engineered open-source implementation, Kodi will not support it.

    I guess this is an open source implementation that LE could use to decode Dolby Vision to HDR10.

    Who could implement it, Kodi or LibreElec?

  • Anything better than a Pi4 currently?

    I think mpv player already does DV 'decoding' by dynamically tonemapping the HDR10 compatibility layer using open source ffmpeg libplacebo library and converting to SDR (or HDR10). I don't know how does LE tonemap HDR10 to SDR (static or dynamic), i just know by default it passes-through HDR10 and DV to the display.

    I own a Samsung S95B Oled tv and it doesn't decode DV, however I have played DV-L1 processed content into HDR10 and native HDR10 on a split-screen clip and it looks the same. Only DV-L2 trim has a colorist tweak to lift dark scene shadows a bit (dynamic metadata), but the player could do it as mpv does. Dolby Vision L1 basically tonemaps the content to the tv luminance range. My HDR10 tv does this on its own. It statically tonemaps out-of-range mastering luminance to its capacity, i.e: 10,000 nits to approx. native 1000 tv nits without clipping using a curve. In theory, as I've been told, a 'normal' HDR10 tv doesn't do it when it's out of its range, for this you'd need DV or HDR10+ , but my tv does it already.

    Dolby Vision is a locked platform. But a player, in this case LE could dynamically tonemap HDR10 content to its target display range. This is what mpv does. Mpv in Windows has access to the system's output display format. I don't know if LE can access the display HDR characteristics by HDMI/EDID.

    Mpv uses two algorithms, bt.2446a for HDR10->SDR, and st2094-40 for dynamic HDR10+ metadata (available or not). Then the gamma and colorspace conversion is done for the display output (P3, BT.1886...).

    Does RPI4 has the computational power for this? popcornmix says for 4k probably not.

  • Mpv as secondary external player/library decoder

    I watched this pull request to Libreelec:

    mpv-drmprime: update to 0.37.0

    mpv player uses ffmpeg libplacebo that ASAIK is capable of decoding Dolby Vision, default since 0.37.0, which requires Fmpeg 4.4 or newer and libplacebo 6.338.0 or newer. Decoding DV by LE would be a great asset, given that only Android OS set-top-boxes are licensed.

    How exactly is mpv-drmprime library used in Libreelec?

    I say so because mpv library opens up the possibility of dynamic tonemapping of Dolby Vision to HDR10 for non compatible displays (apart from SDR tonemapping), similar to HDFURY LLDV video processor. For example Samsung Tv can't decode Dolby Vision, but can play static HDR10.

  • RPi4 testbuild with HDR support

    Quote from noggin

    (*) Dolby Vision Single layer can use 0-1023 levels with IPTPQc2 instead of YCbCr - but I'm not sure how that interacts with HDMI LLDV interconnects. (And it's a non-issue for the Pi 4B)

    Any chance of LLDV decoding from Kodi on RPI4 (I read ffmpeg libplacebo can decode DV) and do HDR10 dynamic tonemapping like hdfury processor?

    My TV is a Samsung and it doesn't decode DV.

  • Manage disk partitions on libreelec

    I'd like to do a filesystem check/repair of libreelec's current partition with e2fsck or fsck, I try to read /etc/fstab but the file is empty.

    Sometimes in case of cold reboot I'd like to check that the filesystem is ok, because I store my media library on libreelec's partition.

  • Librespot Add-on

    Hi, I've installed latest librespot (2023-05-14) kodi plugin, version 11.80.1.1 by awiouy (Anton Voyl) on latest kodi nightly on RPI4.

    The plugin works with default options, in my case backend alsa and device hw:2,0

    #librespot -d ? gives my device:

    Code
    iec958:CARD=sndrpihifiberry,DEV=0
Description:
snd_rpi_hifiberry_digi, HiFiBerry Digi+ Pro HiFi wm8804-spdif-0
IEC958 (S/PDIF) Digital Audio Output
Supported Format(s):
S16 S24

    I have found you can enter certain unconfigured options, since some are preconfigured by the python scripts that load the daemon (there is no systemctl service any longer to manage as audiobobo pointed out). The python acripts that load the daemon are here:

    /storage/.kodi/addons/service.librespot

    By default, cache is disabled and bitrate is set at 320 by, as default soundcard selected by kodi config.

    You can enter extra options in the librespot kodi addon config interface, I entered -f S24 and it seems to work.


    Note: apart from this client addon, I have found another Kodi .zip wrapper manual plugin for Spotify. (https://github.com/jhjdekker98/plugin.audio.spotifyd-client), and it has a link for a armhf binary on https://github.com/Spotifyd/spotifyd/releases, but I haven't tried installing it since it requires Spotify Developer account settings and copying binaries to a specific path: /resources/lib/spotifyd/spotifyd. It is an alternative to the 'official' librespot kodi plugin, and it lets you customize all options to your liking.

  • Amlogic build of LE12 test images

    Quote from chewitt

    NB: I'm not sure what advantage you're expecting with aarch64, but it's not going to noticeably improve anything and you will have to reinstall or remove binary add-ons) as they are not aarch64 compatible; and there will be no replacement binary add-ons in the repo as there are no ARM aarch64 releases for LE11 so the add-ons weren't built/don't exist.

    Hi, is this the same situation for RPI4 12 nightly builds? Are all add-ons binary? I say this because I'm running nightly aswell and add-ons work.

    In the past I've run nightly builds for android-tv from kodi repos without problems for basic add-ons.

    I'm waiting for next nightly build, which bumps from 6.1 to 6.4 kernel, yay! I'm expecting improvements on kernel video drivers' hardware acceleration.

    Do most 12/omega add-ons/plug-ins come natively on 64-bits now?

    I heard 12 switches to 64-bits.

    BTW, why do nightly builds occasionally take longer hiatus, such as now, 6 days and no build? (Sorry for the question, didn't want to push)

  • Tvheadend nightly builds for LE

    Quote from Mario77

    Does it show in LE11 without any overlays?

    I tried stable Bullseye 32-bit Raspberry Pi OS without overlays, according to tv hat official guide, but I seem to have a problem recognising the Sony tv tuner chip:

    Code
     [   11.192689] cxd2880: cxd2880_attach: chip id invalid.

    I'm following advice on this post now:

    Thread

    Add support for sony cxd2880 tuner to kernel for official RPI DVB tv hat

    I bought recently an official RPI TV hat and installed Libreelec 12 nightly along with tvheadend 4.1 server and client. Added dtoverlay=rpi-tv and gmem=128. Did the localhost:9981 setup wizard but it doesn't find any tuner.

    Dmesg returns: "cdx2880_attach: chip id invalid". It seems the Sony cxd2880 tv tuner driver is not in the nightly kernel. Could you please add it to the nightly build?. It used to be in earlier versions. I installed latest Raspberry Pi OS 32-bit stable and I have the same…
    wyup
    June 27, 2023 at 8:14 PM

  • cold reboot needed after mount_storage error at first boot after RPI4 LE12 nightly build on sd card flash

    Hello:

    In two cases after flashing two latest RPI4 12 nightly builds on sd card, at first boot, an error like this appears in console:

    Code
    error in mount_storage. mount_common: could not mount UUID-xxxxxxxxxxxx ***
## Starting debugging shell for boot step: mount_storage... type exit to quit ###

    then, as I don't have keyboard available, must cold reboot RP4 and normal boot ensues

    note: I had edited config.txt before first boot to add some audio overlay, gpio-ir and little else.

    I did a scandisk and failsafe extract the card from a Windows PC card reader, and had used LibreELEC USB-SD Creator to flash without error.

    Sdcard is a 128GB microSDXC Canvas Go Plus 170R A2 U3 V30, #1 fastest card for PI according to https://pibenchmarks.com/brand/Kingston…us_%28SD128%29/

  • Add support for sony cxd2880 tuner to kernel for official RPI DVB tv hat

    Strange.. if I set config.txt to defaults with latest 12 build, "cxd2880" or "dvb" don't even appear in dmesg.

    I have another audio hat, but I make sure it's not sharing tv hat GPIO pins.

    There are occurrences of this in other forums: one user bought a new hat and another did a "soldering of a new GPIO header" to a Zero W:

    https://forums.raspberrypi.com/viewtopic.php?t=232037 (soldered GPIO header)

    https://dietpi.com/forum/t/tv-hat…-properly/14998 (bought a new hat)

    Does it mean that the culprit was a faulty GPIO header? My tv hat comes with a detachable header. Some pin was slightly bent while plugging in and out, but I corrected it with tweezers and the header plugs in fine. I also tried to plug the tv hat in reverse on the upper side of the board the first time until I realized it was on the other. I don't think I need to solder anything, do I?

    Can you help if that is related to me?

  • Add support for sony cxd2880 tuner to kernel for official RPI DVB tv hat

    I bought recently an official RPI TV hat and installed Libreelec 12 nightly along with tvheadend 4.1 server and client. Added dtoverlay=rpi-tv and gmem=128. Did the localhost:9981 setup wizard but it doesn't find any tuner.

    Dmesg returns: "cdx2880_attach: chip id invalid". It seems the Sony cxd2880 tv tuner driver is not in the nightly kernel. Could you please add it to the nightly build?. It used to be in earlier versions. I installed latest Raspberry Pi OS 32-bit stable and I have the same problem.

    It's available here: https://github.com/torvalds/linux…ontends/cxd2880

    Code
    [   11.026954] dvbdev: DVB: registering new adapter (CXD2880)
[   11.042537] brcmfmac: F1 signature read @0x18000000=0x15264345
[   11.098387] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43455-sdio for chip BCM4345/6
[   11.099534] usbcore: registered new interface driver brcmfmac
[   11.192689] cxd2880: cxd2880_attach: chip id invalid.
[   11.192727] cxd2880_spi: cxd2880_spi_probe: cxd2880_attach failed

  • Are RPi4 12.0 nightly builds recommended for general use?

    Thanks, didn't know that 12 is getting a switch to 64 bit, that is a major change!

    I'm using 12 for the moment, and have experimented temporary dropouts on wifi near the router, i have turned off bluetooth (among many tests on wifi parameters) and this seemed to help, I also applied some tweaks by another user in config.txt to fix slowness on ssh terminal (disable leds and low power wifi). Im using a semi-case heatsink, dont know if this impacts the wifi/bluetooth antenna.

    Havent gone to 11 stable to rule this out, I think I should, but too much work to undo<X.

    Thanks for the tip, developer

  • Tvheadend nightly builds for LE

    Quote from ghtester

    It's the same like in earlier RPi4 LE versions - you need to install Tvheadend add-ons (Services-Tvheadend Server 4.2 or 4.3(Alpha) and PVR_clients-Tvheadend HTSP Client)

    I did install both: Services-tvheadend 4.1 stable and client on Le12 nightly, entered config at http://libreelec:9981/ but under Settings>DVB>TV Tuners, my PI DVB Tv tuner hat does not appear.

    Shall i add any dtoverlay for the tv hat?

    I entered dtoverlay=rpi-tv in confix.txt but I can't see the tuner in the web app.

  • Volume Control Via Remote

    Hi, I'd like to control Kodi volume from CEC Samsung tv remote. As of now, Vol+ and Vol- controls the tv volume but I'd like to control Kodi volume.

    Is it possible?

    On the other hand, I have a IR sensor on a PI hat, but I don't have an additional IR remote. Can I disable/override CEC on the tv and enable my Samsung remote as a IR remote instead of CEC, so I can control Kodi Volume (and hopefully more functionality)?