Posts by noggin

Quote from Anard

Hi.

I've installed LibreElec on a RasPi3B+ to use it as media center.

My screen is a big plasma TV with 1024x768 resolution, but without HDMI inputs. So I use composite input with the Raspberry's mini-jack output.

First problem is that I can't see borders of the screen. It misses about 30px on each edge (see photo below). I tried to edit the screen settings without success.

The second is that there are interferences in audio output. It could be due to my cable but I tried just before the same configuration with Raspbian installed and it was OK.

Is there a way to prevent it by software ?

Thanks for your answers.

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The 30px missing all around your image are because your plasma is 'over scanning' (or more accurately simulating it).

There is an option in config.txt to allow you to scale the Pi's output, reducing it in size, to counteract overscan in your display. This may only work with HDMI not composite though.

You can also calibrate within Kodi.

If your TV has component inputs - then an HDMI to component adaptor may also be worth a look to improve picture quality.

Yes - flash/config.txt is a very Raspberry Pi specific instruction, that is almost certainly not relevant to a C2.

Quote from blueribb

Even though your NUC is running a Celeron (J3455) processor, it should have enough power to play most HD audio and video files up to 1080p. Are any of your files HEVC encoded ? Even my i5 processor has trouble with those files when FFing and RWing.

Have you tried running Windows on your NUC ?

Doesn't the J3455 support hardware acceleration up to HEVC 10-bit and with UHD resolutions (for decode if not output)? (Is this one of the CPUs that performance varies between single and dual channel RAM config?)

My N3350 Up Squared board plays 2160p50 HEVC 10-bit stuff OK, and that's got the same Intel GPU and a dual core (the J3455 is quad core) CPU.

Quote from Dickermoby

Hello again,

In Backend i'm seeing the time and epg. So i think i only need a rtc for pi3

I saw some solution where i must activate Something in a config File and Set Date First manually. Should i do it with ssh/putty or has libreelec an internal Shell/command Line?

SSH is the way most of us do it.

Quote from Dickermoby

i think i must Check If the wetek Server is getting time with dvb Broadcast (Update function).Can i See it in Backend?

If yes i must Look for a rtc for pi3. Any prefered Module? Is it Plug and Play?

Can you ssh into the Wetek? I think typing

date

will return the system time and date.

Afraid I don't use RTCs - I have an internet connection on all my networks.

Quote from Dickermoby

I'm Not Sure If Fritzbox has a time without internet. Providing as time Server is possible.

Do i need a correct time on Server and Client?

It seems to be a difficult topic.

If i set Update time in Backend, then the time at wetek should be ok? This point i didn't checked.

To make recordings properly, your backend time needs to be set (as it needs to know what time to start recording) In this case your Wetek.

To display a programme guide I would expect your front-end time needs to be correct, as it will need to know the client's time to display the 'right' section of the guide. (ISTR TV Headend can cope with a client and server in different time zones)

An RTC on the Pi is probably the easiest way of keeping the Pi time/date correct?

It could be DVB Time on the Wetek (either via TV Headend or dvbdate) and an RTC on the Pi is the approach you could take.

Can your Fritzbox use a cheap 3G/4G USB broadband dongle with a Pay-and-Go data SIM? If you only need to set NTP now and again that might be a neater solution.

(I have a Dovado router that accepts a 3G/4G USB dongle for use when in summer cabins, on-the-road etc., and as a failover if cabled broadband goes down. They are quite popular in Sweden for this purpose, but other routers also offer this functionality)

Quote from Dante4

That's not possible? Raspberry Pi simple don't have hardware acceleration for 10 bits, 720p low-bitrate maybe, but 1080p?

Recent optimisations of HEVC CPU+GPU decoding on the Pi have done pretty amazing things. 1080p content is playing now - though not all.

Ah - I think we've missed that you're running TVH on a Wetek and your Client on a Pi.

The TV Headend tick boxes and DVBDate will set the time on the Wetek (which is running TV Headend) NOT the Pi client AIUI.

A RTC on the Pi is still a good bet - but if you can get your Fritzbox to run a proper NTP server that might work - though you'll have to configure the Pi to NTP from it?

Beware interlaced content on the Rock64 though. In my experience H264 interlaced TV stuff is still borked.

Quote from Dickermoby

Happy new year to all,

I'm connected to a Router. But i have no Internet. It's Not needed.

I already activated time Update function. But i saw no effect on Client.

I didn't check any changings at wetek Box. It's not connected to Monitor/TV.

I also don't understand, that i cannot record without epg. Only Pressing Button and go..

Have you watched a channel since you enabled Time Update?

Does your router (or whatever is running as your DHCP server) definitely always give the same DHCP leased IP address to the same MAC address? Not all routers do.

Looks like there are two options in Tvh - the Update time will work if you are root and is supposed to be more reliable, the NTP driver will run as any user but is less reliable?

Quote

Time Update

Tvheadend has a built-in capability to update the system time. However, you should bear in mind that DVB time is not highly accurate and is prone to both jitter and variation between different transponders.

Where possible, it’s probably still better to use an internet based NTP source to synchronise the system clock (i.e. through the underlying operating system).

Update time : Enable system time updates. This will only work if the user running Tvheadend has rights to update the system clock (normally only root).

Enable NTP driver : This will create an NTP driver (using shmem interface) that you can feed into ntpd. This can be run without root privileges, but generally the performance is not that great.

Update tolerance (milliseconds) : Only update the system clock (doesn’t affect NTP driver) if the delta between the system clock and DVB time is greater than this. This can help stop excessive oscillations on the system clock.

General - Tvheadend 4.0

Is dvbdate available in any LibreElec add-on?

dvbtools/dvbdate at master · linuxstb/dvbtools · GitHub

That would set the time and date from a currently tuned DVB stream? It might be possible to create a startup script that tuned a main channel and ran dvbdate, and then ran it again, say at 0300 or 0400 each morning? This is how most non-smart set top boxes and TVs work to get their time and date after all.

(It's a relatively old bit of code but might be worth a look?)

Quote from thomsa

Just installed the latest beta 8.95.001 on my wetek play - and also installed the amazon vod plugin. it works but the video slutters ... when i look to cpu usage during playback its at 100% - the codec doesnt seems to use the hardware capabilities of the wetek to decode the h264-stream. ist there a solution?

ARM SoCs have to software decode DRM-ed content from Amazon and Netflix for the DRM component used in Kodi to work. They can't use hardware acceleration for these streams.

Quote from ooztuncer

Hello,

First post on the forums. I have been reading a lot of reviews and forum posts but confused and lost! Would you please recommend me several alternatives for my needs:

Setup: source (searching) > denon s730h receiver (hdcp 2.2 and atmos capable) > 4k projector and 5.1.2 atmos speakers

What I need / am looking for:

a. Netflix 4k HDR + atmos + if possible auto frame rate switching.

b. Able to play 4k HDR + passthrough atmos (lossless) via hard disk (file sizes will be big so NTFS is required) and/or using Kodi.

c. Able to use/play IPTV.

d. ethernet connection.

e. cost: as low as possible

I thought of :

- Apple TV 4k and firestick tv 4k but they are lacking (b),

- using my pc (ryzen 2200g) but AMD haven't released playready drivers for Raven Ridge APU's and I found investing in a RX550 or higher polaris cards or gtx 1050 cards to be expensive and they could very well be cumbersome (drivers, windows issues, etc.),

- not sure about S905D or S912 based android boxes (I have a mecool ms8 pro + and netflix is down once again - twice this year - due to licensing issues) but I am open for a reliable one.

So, can you please recommend something suitable for me or share your thoughts.

Best,

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The only device that almost hits those at the moment is the nVidia Shield TV. (It handles 4K, HDR, Netflix 4K, bit streamed HD audio etc.)

The nVidia Shield TV doesn't have automatic frame rate switching in Netflix yet (Kodi on the Shield TV DOES automatically frame rate switch), and colour gamut output is fixed at either Rec 2020 or Rec 709 (set in the Android settings menu), though gamut and frame rate switching was announced as a change in the new firmware but was then postponed.

The current nVidia Shield TV SDR Rec 709 to SDR Rec 2020 conversion (their alternative to gamut switching) is well implemented - but some TVs don't handle SDR Rec 2020 in the way the nVidia Shield TV mapping expects them too...

If you remove the Netflix 4K requirement (and use a Roku Streaming Stick Plus - which has frame rate and colour gamut switching - or similar for Netflix 4K) then a lot more options become available for Kodi, such as S905X/D (X=100Mbs Ethernet, D=Gigabit Ethernet usually) boxes running OSMC (Vero 4K+) or LibreElec. The Minix U9H (S912 based) also handles LE well - but the GPU in the S912 isn't officially supported in Linux and may not continue to work in Kodi 19 (unless the open source drivers deliver in time) So far I'm not sure how well the AMLogic drivers handle correct HDR10 metadata pass-through for Max/Average light levels (which is needed for some displays to tone-map out-of-range HDR content correctly)

Quote from Nunu81

I have tried several samples like the LG Cymatic Jazz 4k Demo. Any type of HDR or HLG does not work in the rockpro64. I bought another board, as it seems that the rk3399 will take time to work properly

Yep - both the the Cymatic Jazz HLG and HDR10 versions play with HLG and ST.2084 PQ flags correctly on the Rock64.

I have a feeling Max/Avg light level metadata may not be passed with the HDR10 version - will check again.

I have a RockPro64 too - currently running OMV from eMMC. If I get a chance I'll boot it into LE from a uSD card.

Quote from Nunu81

Supposed that it also works with the rockpro64? Does not work for me

What HLG content are you playing?

The serial UART handling on the Pi 3B and 3B+ (and Zero W) changed compared to previous models to allow for the internal Bluetooth.

If the OP has previously enabled it on a Pi2 or lower then there is a change.

I have found this pi 3 - How do I make serial work on the Raspberry Pi3 , Pi3B+, PiZeroW - Raspberry Pi Stack Exchange :

Quote

The BCM2837 on the Raspberry Pi3 , Pi3B+, PiZeroW has 2 UARTs (as did its predecessors), however to support the Bluetooth functionality the fully featured PL011 UART was moved from the header pins to the Bluetooth chip and the mini UART made available on header pins 8 & 10.

This has a number of consequences for users of the serial interface.

The /dev/ttyAMA0 previously used to access the UART now connects to Bluetooth.

The miniUART is now available on /dev/ttyS0.

In the latest operating system software there is a /dev/serial0 which selects the appropriate device so you can replace /dev/ttyAMA0 with /dev/serial0 and use the same software on the Pi3 and earlier models.

For some bizarre reason the default for Pi3 using the latest 4.4.9 kernel is to DISABLE UART. To enable it you need to change enable_uart=1 in /boot/config.txt. (This also fixes the core_freq so this is no longer necessary.)

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