Go to advanced search

by noggin
Mon Feb 18, 2019 11:10 pm
Forum: HATs and other add-ons
Topic: Does TV HAT support BBC Red Button using MHEG-5?
Replies: 3
Views: 129

Re: Does TV HAT support BBC Red Button using MHEG-5?

I'm not sure there is a Linux MHEG5 open source implementation. I've not seen Red Button Digital Text support on a Linux DVB open source platform, only Windows. (Windows Media Centre supported it, and there is a DVB Viewer Windows plug-in. The latter also supports the newer HbbTV stuff too) (MHEG5 i...
by noggin
Mon Feb 18, 2019 9:06 am
Forum: Graphics, sound and multimedia
Topic: SDI camera input
Replies: 3
Views: 99

Re: SDI camera input

You essentially have two choices with HDMI/HD-SDI capture on a Pi - capture uncompressed (and the only bus fast enough for that on a Pi is the CSI I think) or compress to h.264/MPEG2 externally and connect your external compression solution via a USB 2.0 port. However Linux driver support for the la...
by noggin
Sun Feb 10, 2019 10:04 am
Forum: Media centres
Topic: RPI as home cinema receiver/amp
Replies: 2
Views: 823

Re: RPI as home cinema receiver/amp

https://www.hifiberry.com/shop/boards/hifiberry-digi-io/ The Hifi Berry Digi I/O provides both COAX and TOSLINK SP/DIF Input and Outputs for the Raspberry Pi. However I don't know if simultaneous input and output is supported by the I2S connectivity used. If you want a DAC + AMP as well you only rea...
by noggin
Tue Jan 15, 2019 11:14 am
Forum: Media centres
Topic: Advice on using Pi as TVHeadend headless backend.
Replies: 3
Views: 586

Re: Advice on using Pi as TVHeadend headless backend.

Hello. I have just been looking into the possibility of using the latest raspberry Pi for recording, with TVHeadend. I am curious as to how TVHeadend affects the SD card, used for the Operating System. Does TVHeadend constantly write to the card (with EPG updates, schedule updates etc.) or does it ...
by noggin
Wed Dec 19, 2018 5:10 pm
Forum: Graphics, sound and multimedia
Topic: Composite AV recorder / Passthrough
Replies: 10
Views: 745

Re: Composite AV recorder / Passthrough

Also - if capturing via USB and also recording to disc - you will almost certainly want compression either in the capture card or at least the recording subsystem. Assuming 720x576 at 25fps capture in 4:2:2 8-bit you will have an uncompressed bitrate of 720x576x25x16 = 166Mb/s If you capture AND rec...
by noggin
Sat Dec 15, 2018 4:56 pm
Forum: Graphics, sound and multimedia
Topic: Pi-to-Pi Low Latency One-To-Many Video Streaming
Replies: 9
Views: 1052

Re: Pi-to-Pi Low Latency One-To-Many Video Streaming

I can't help with specific set-ups but I an offer some codec advice. <snip> Sorry, a fair amount of that is only partly true. Apologies. An H264 I frame is more efficiently coded than MJPEG. MJPEG really should be avoided unless you have a very good reason to use it (needing more than 1080P would b...
by noggin
Fri Dec 14, 2018 9:57 am
Forum: Graphics, sound and multimedia
Topic: Pi-to-Pi Low Latency One-To-Many Video Streaming
Replies: 9
Views: 1052

Re: Pi-to-Pi Low Latency One-To-Many Video Streaming

I can't help with specific set-ups but I an offer some codec advice. To run with the lowest latency possible you want to avoid anything with a long GOP (Group of Pictures). LongGOP compression is how H.264/MPEG2/VC-1 reduce their data rate or increase their picture quality - but in doing so they buf...
by noggin
Sun Dec 09, 2018 10:17 am
Forum: Media centres
Topic: 5.1 sound over optical, from Netflix and Prime
Replies: 3
Views: 984

Re: 5.1 sound over optical, from Netflix and Prime

Off topic - but to answer the OP's question - I'd check both the Apple TV and the Amazon Fire TV for Dolby Digital (not DD+) compatibility with Netflix and Amazon. I'm pretty certain the Apple TV will output legacy Dolby Digital and I have a feeling the Fire TV may do too. The new Fire TV Stick 4K a...
by noggin
Wed Dec 05, 2018 9:04 am
Forum: Graphics, sound and multimedia
Topic: skewed image display with customized hdmi_timings
Replies: 3
Views: 504

Re: skewed image display with customized hdmi_timings

Are you able to dump your projector's EDID and parse it as I suggested in my previous response? Also - if you name the projector we may be able to find a data sheet? 854x480 is a tricky resolution to handle - it's not a standard consumer CTA video HDMI standard, though there is an 848x480 60Hz stand...
by noggin
Tue Dec 04, 2018 11:17 am
Forum: Graphics, sound and multimedia
Topic: skewed image display with customized hdmi_timings
Replies: 3
Views: 504

Re: skewed image display with customized hdmi_timings

If you boot without custom timings do you get a display?

If you boot without custom timings what is the contents of edid.txt when you do this :

Code: Select all

tvservice --dumpedid edid.dat
edidparser edid.dat > edid.txt
by noggin
Mon Dec 03, 2018 10:23 pm
Forum: Graphics, sound and multimedia
Topic: Raspberry Pi in KORG Volca synthesizer
Replies: 6
Views: 713

Re: Raspberry Pi in KORG Volca synthesizer

timschoen123 wrote:
Mon Dec 03, 2018 2:27 pm
That’s a pretty good idea, I don’t own a logic analyser, could I do this with a multimeter for V/A/W/Ohm?
A multimeter will probably let you work out which pin is the main voltage rail - but probably not much else?
by noggin
Mon Dec 03, 2018 10:22 pm
Forum: Graphics, sound and multimedia
Topic: Raspberry Pi in KORG Volca synthesizer
Replies: 6
Views: 713

Re: Raspberry Pi in KORG Volca synthesizer

I also figured out that there’s exactly 64 buttons/leds/touchpad spots which could mean that 1 pin is for power and the other 6 pins could be used for exactly 64 binary options. There’s a tiny problem with this, there’s 24 inputs and 40 outputs so each pin needs to be both input and output I suppos...
by noggin
Mon Dec 03, 2018 1:23 pm
Forum: Graphics, sound and multimedia
Topic: Raspberry Pi in KORG Volca synthesizer
Replies: 6
Views: 713

Re: Raspberry Pi in KORG Volca synthesizer

I'd suggest running the Korg with the module connected to the synth normally and sniffing the pins connecting the two carefully with a scope or logic analyser? That way you can see what is going on when the module runs normally?
by noggin
Sun Dec 02, 2018 2:43 pm
Forum: Graphics, sound and multimedia
Topic: Raspberry Pi 4K/25 "HDMI_TIMINGS" in config.txt
Replies: 2
Views: 798

Re: Raspberry Pi "HDMI_TIMINGS" in config.txt

However I tried keeping the same porch settings and altering the clock rate to 25/30 x 297 and it seems to work : hdmi_timings=3840 1 176 88 296 2160 1 8 10 72 0 0 0 25 0 247500000 3 This time my HD Fury recognised it as a valid mode - however I'm not sure my Denon amp is that happy (it brings up an...
by noggin
Sun Dec 02, 2018 2:23 pm
Forum: Graphics, sound and multimedia
Topic: Raspberry Pi 4K/25 "HDMI_TIMINGS" in config.txt
Replies: 2
Views: 798

Re: Raspberry Pi "HDMI_TIMINGS" in config.txt

OK - done a bit more digging. Dumped my AVR+TV's EDID on the pi using tvservice --dumpedid edid.dat parsed it to a text file using edidparser edid.dat > edid.txt This included the line : HDMI:EDID failed to find a matching detail format for 3840x2160p hfp:176 hs:88 hbp:296 vfp:8 vs:10 vbp:72 pixel c...
by noggin
Sat Dec 01, 2018 7:00 pm
Forum: Graphics, sound and multimedia
Topic: Raspberry Pi 4K/25 "HDMI_TIMINGS" in config.txt
Replies: 2
Views: 798

Raspberry Pi 4K/25 "HDMI_TIMINGS" in config.txt

Hi all I'm trying to coax my Pi into generating some 2160p video timings. I've got some non-standard timings generated by details in other threads here, but would like to get standard CTA-861 timings implemented if at all possible. My HD Fury Vertex HDMI analyser confirms that the current timings I'...
by noggin
Sat Dec 01, 2018 4:31 pm
Forum: Graphics, sound and multimedia
Topic: Raspberry Pi and 4k @ 15Hz
Replies: 118
Views: 142547

Re: Raspberry Pi and 4k @ 15Hz

At turbo mode and increasing the pixel clock limit, I got 4K@50hz!!! But I view that the VPU is running at full tilt. Sorry to resurrect this - but could you share the settings you used to get 3840x2160 at 50Hz? **EDIT - ah - last time mimi123 was here was 2 years ago... ** Anyone else got >30Hz 21...
by noggin
Sat Dec 01, 2018 1:28 pm
Forum: HATs and other add-ons
Topic: TV Hat / Cable TV
Replies: 6
Views: 1443

Re: TV Hat / Cable TV

Will the TV Hat work with Cable TV input, or only an over the air antenna? The TV uHAT is - as far as we know - DVB-T/T2 only. DVB-T/T2 are the pair of European OTA standards used in Europe, Australia, New Zealand and some parts of Asia, Africa and a couple of countries in South America. A differen...
by noggin
Sun Nov 25, 2018 2:43 pm
Forum: HATs and other add-ons
Topic: TV HAT - finds muxes but no services
Replies: 20
Views: 2798

Re: TV HAT - finds muxes but no services

https://git.linuxtv.org/dtv-scan-tables.git/tree/dvb-t/de-Bayern is the upstream source in the Linux world for your DVB settings. You make my day!!! Entering the settings from the side abouve made the trick!!! Thank You very much! :D :D Ah - it looks as if Germany is 8MHz not 7MHz for DVB-T/T2 - th...
by noggin
Sun Nov 25, 2018 1:04 pm
Forum: HATs and other add-ons
Topic: TV HAT - finds muxes but no services
Replies: 20
Views: 2798

Re: TV HAT - finds muxes but no services

In fact - I've just tried a 'from scratch' start in the UK on Crystal Palace - which is my local transmitter. I just needed to enter the delivery system, frequency and bandwidth. I could leave the constellation and transmission mode on Auto and it all autodetected fine. One thing that is easy to mis...
by noggin
Sun Nov 25, 2018 12:52 pm
Forum: HATs and other add-ons
Topic: TV HAT - finds muxes but no services
Replies: 20
Views: 2798

Re: TV HAT - finds muxes but no services

I'd only enter the following settings : Delivery System : DVB-T2 Frequency : 634000000 (for ARD-BR) Bandwidth : 7MHz THIS WAS WRONG - GERMANY USES 8MHz MUXES IT APPEARS Constellation : 64/QAM Transmission Mode : 16K I'd leave Guard Interval, FEC, Hierarchy and PLP as AUTO or the defaults. (It MAY be...
by noggin
Sun Nov 25, 2018 12:00 pm
Forum: HATs and other add-ons
Topic: Pi TV Hat questions
Replies: 6
Views: 2513

Re: Pi TV Hat questions

I asked. It's apparently for programming the HAT ID EEPROM with the correct contents during manufacture. Nothing useful for end users.

Official HATs have an ID EEPROM that is read via I2C so that the Pi knows which HAT is connected and loads the correct drivers/device tree?
by noggin
Sun Nov 25, 2018 11:12 am
Forum: HATs and other add-ons
Topic: TV HAT - finds muxes but no services
Replies: 20
Views: 2798

Re: TV HAT - finds muxes but no services

journalct -t tvheadend shows always errors like: mpegts: 530MHz in DVB-T Network - scan no data, failed ..tvheadend[571]: subscription: 007D: "scan" unsubscribing .. tvheadend[571]: mpegts: 490MHz in DVB-T Network - tuning on Sony CXD2880 #0 : DVB-T #0 ..tvheadend[571]: subscription: 007F: "scan" s...
by noggin
Sun Nov 25, 2018 10:58 am
Forum: HATs and other add-ons
Topic: TV HAT - finds muxes but no services
Replies: 20
Views: 2798

Re: TV HAT - finds muxes but no services

Is there a configuration setting in TVHeadend to flag a mux as hosting DVB-T2 rather than DVB-T services? Yes - you edit the Mux in the Muxes tab. In that tab you select DVB-T or DVB-T2 from a drop down. Early T2 USB sticks ignore this as they auto-detected, but most tuners now seem to need it expl...
by noggin
Sun Nov 25, 2018 10:52 am
Forum: Media centres
Topic: Simple Offline Media Player for road trip?
Replies: 4
Views: 2775

Re: Simple Offline Media Player for road trip?

If you are using the VIDEOS->FILES route to play videos in Kodi, then I don't think you should have to do anything for USB drives to automount? You only need to scan content if you are adding it to the MOVIES/TV SHOWS library - which isn't what you want to do if you just want to play files from a st...

Go to advanced search