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by dividuum
Wed Jul 25, 2018 1:12 pm
Forum: Graphics, sound and multimedia
Topic: RANDOM VIDEO PLAYER FOR ART INSTALATION
Replies: 8
Views: 2316

Re: RANDOM VIDEO PLAYER FOR ART INSTALATION

True seamless will be hard to do with a rpi just based on the processing power. That's not correct. My info-beamer pi software is capable of that. It works by preloading and pausing the next video before the current video ends. Once it ends, it unpauses the next video. It works pretty well. Here's ...
by dividuum
Mon Apr 09, 2018 5:22 pm
Forum: OpenGLES
Topic: Trouble rendering a simple OpenGL ES 2.0 application
Replies: 1
Views: 6128

Re: Trouble rendering a simple OpenGL ES 2.0 application

I doubt you'll get useful feedback if you don't post at least some of your code.
by dividuum
Thu Mar 08, 2018 12:51 pm
Forum: Graphics programming
Topic: Possible to adjust phase of frame timing on video output?
Replies: 9
Views: 2850

Re: Possible to adjust phase of frame timing on video output?

There is the hdmi_adjust_clock vcgencmd command that can be used to adjust the output HDMI clock frequency. There's a post somewhere in this forum that describes that using a slightly increased or decreased framerate is still within the HDMI spec. I've using this in info-beamer pi to create the &quo...
by dividuum
Wed Feb 21, 2018 3:45 am
Forum: Advanced users
Topic: RPi configred as Access Point to configure Wifi?
Replies: 17
Views: 9082

Re: RPi configred as Access Point to configure Wifi?

Hi, ,this is exactly what I'm looking to do but I need the process embedded into my Raspberry Pi Zero W .. do you offer a non-hosted solution? Sorry, I don't. Also it's tightly integrated into the custom Linux distribution that info-beamer hosted is using, so it wouldn't work in Raspbian without qu...
by dividuum
Sat Feb 10, 2018 6:37 pm
Forum: Advanced users
Topic: RPi configred as Access Point to configure Wifi?
Replies: 17
Views: 9082

Re: RPi configred as Access Point to configure Wifi?

I was thinking of the guy who puts the video projector in the room and starts it. The Pi does his "no net? AP, then" thing, and the screen displays the QR code. So the guy flashes the screen with his phone, that gives him access to that AP and he can configure the network. Except that the...
by dividuum
Sat Feb 10, 2018 11:51 am
Forum: Advanced users
Topic: RPi configred as Access Point to configure Wifi?
Replies: 17
Views: 9082

Re: RPi configred as Access Point to configure Wifi?

If your beamer is a client: WPS is deemed insecure, many APs do not support it and wise admins disable it. If your beamer is the AP: some clients don't support WPS at all, eg iOS. Yeah. That doesn't sound too good. I figured WPS might be used as a signal to trigger starting the configuration access...
by dividuum
Fri Feb 09, 2018 7:48 pm
Forum: Advanced users
Topic: RPi configred as Access Point to configure Wifi?
Replies: 17
Views: 9082

Re: RPi configred as Access Point to configure Wifi?

(Still, I'd prefer a button. Just a matter of taste.) I agree. If the Pi had a hardware button, I'd totally use that. I haven't looked too deeply into WPS, but I feel like there might be neat way to make the configuration interface toggle-able that way. Not sure though. Might be worth looking into.
by dividuum
Fri Feb 09, 2018 4:19 pm
Forum: Advanced users
Topic: RPi configred as Access Point to configure Wifi?
Replies: 17
Views: 9082

Re: RPi configred as Access Point to configure Wifi?

I suspect nobody has done that because there is a lot of "if..." in that last paragraph. Not at all :-) I can confirm that I've actually done exactly what OP outlined for the info-beamer hosted digital signage linux system. I think I also solved a few of the problems you've outlined: - Im...
by dividuum
Thu Jan 11, 2018 11:11 am
Forum: Advanced users
Topic: Scaling digital signage to 500 screens with limited bandwidth
Replies: 16
Views: 4304

Re: Scaling digital signage to 500 screens with limited bandwidth

Just set up a local cache/proxy? Configure one RPi to download new content externally once per day and schedule all the others to download from it, on random or distributed (maybe by IP address) times during the night. Could be very simple with manual configuration pointing to your local cache or v...
by dividuum
Wed Jan 10, 2018 6:23 pm
Forum: Advanced users
Topic: Scaling digital signage to 500 screens with limited bandwidth
Replies: 16
Views: 4304

Re: Scaling digital signage to 500 screens with limited bandwidth

Adding to my previous response: This feature is now publicly available and can be activated (almost) with the click of a button. Learn more here:

https://info-beamer.com/blog/introducin ... stribution

Happy to answer any questions.
by dividuum
Mon Dec 18, 2017 12:40 am
Forum: Advanced users
Topic: Scaling digital signage to 500 screens with limited bandwidth
Replies: 16
Views: 4304

Re: Scaling digital signage to 500 screens with limited bandwidth

Hey adishankara8, just a quick update. There's now a version of the info-beamer hosted that has experimental peer-to-peer support. Once installed, your Pis can detect each other in your local network. If you assign new content to them, they will automatically try to fetch the content from each other...
by dividuum
Sat Dec 02, 2017 9:45 pm
Forum: Advanced users
Topic: Scaling digital signage to 500 screens with limited bandwidth
Replies: 16
Views: 4304

Re: Scaling digital signage to 500 screens with limited bandwidth

What's the timeframe for your project? The info-beamer hosted digital signage system might have the option to do secure peer-to-peer distribution of content in the near future. A prototype is already close to being finished. Assuming the Pis can talk and discover each other in your local network, un...
by dividuum
Mon Aug 07, 2017 7:31 pm
Forum: Graphics, sound and multimedia
Topic: Set up a video wall by just taking a picture of your screens
Replies: 2
Views: 1447

Set up a video wall by just taking a picture of your screens

I've created an exciting video walls package running on the Raspberry Pi. You can create a video wall consisting of freely arranged screens in seconds. The screens don't even have to be planar. Just rotate and place them as you like. Configuration is as simple as creating a picture of your screens o...
by dividuum
Fri Aug 04, 2017 5:53 pm
Forum: OpenGLES
Topic: OpenGL ES 2.0 - play .mp4 on texture
Replies: 9
Views: 8539

Re: OpenGL ES 2.0 - play .mp4 on texture

Ok, I used libav to convert .mp4 in .h264 it works with hello_video, but not in hello_videocube (always black textures )... any idea, please ? Any error message at all? Does the video play with omxplayer? What changes did you make to hello_videocube? Or did you only switch out the referenced hello....
by dividuum
Tue Aug 01, 2017 11:29 pm
Forum: OpenGLES
Topic: OpenGL ES 2.0 - play .mp4 on texture
Replies: 9
Views: 8539

Re: OpenGL ES 2.0 - play .mp4 on texture

I don't think there's any library out there that will help you. hello_videocube is probably the best example for how to play videos on a texture. I don't think you'll find a lot of documentation either. The whole OMX aspect of the Pi is underdocumented and very frustrating.... If you want to play mp...
by dividuum
Thu Jul 27, 2017 10:18 pm
Forum: Advanced users
Topic: Smallest OS possible?
Replies: 5
Views: 10435

Re: Smallest OS possible?

I've been trying to find information on creating a very small OS for the Pi and came across info-beamer.com who suggest their entire system is 35mb in size. I'm the programmer behind info-beamer. The OS that drives all the digital signs is indeed only 35MB in total at the moment. The main reason th...
by dividuum
Wed May 24, 2017 11:59 pm
Forum: Advanced users
Topic: Power Failure simulation with watchdog
Replies: 13
Views: 2653

Re: Power Failure simulation with watchdog

How does the watchdog shutdown the raspberry pi? Does the wd just cut the power or perform a safe shutdown?? As it's a hardware watchdog, it forcefully resets the system if you fail to send keepalives. It is a hard reset and Linux has no way to react that that. So it's definitely not a safe shutdow...
by dividuum
Sat Mar 25, 2017 11:57 am
Forum: Advanced users
Topic: How can I get my system to automatically update?
Replies: 3
Views: 1924

Re: How can I get my system to automatically update?

I am trying to harden the security of my system. I think you're looking for unattended-upgrades : https://wiki.debian.org/UnattendedUpgrades See also http://raspberrypi.stackexchange.com/q/38931 (cron also has the @reboot special string, if you only want to execute something when rebooting). But as...
by dividuum
Sat Mar 25, 2017 12:51 am
Forum: Graphics, sound and multimedia
Topic: Digital Signage on RaspPi3
Replies: 21
Views: 76455

Re: Digital Signage on RaspPi3

I remember from another one of your posts that this had inherent restrictions. Can't recall exactly now, but I remember you said something about 720p only. Perhaps I am wrong though. No. You're right. But 1080p30 seems to work on the Pi3. It is definitely more work for the GPU compared to directly ...
by dividuum
Fri Mar 24, 2017 12:57 pm
Forum: Graphics, sound and multimedia
Topic: Digital Signage on RaspPi3
Replies: 21
Views: 76455

Re: Digital Signage on RaspPi3

Video Wall feature is in the works. I see that you use the LKV373A V3.0 for that. I have one of those laying around (great for low cost screen captures). So far I didn't have any luck getting 1080p60 with it. 720p60 is the only option that produces a good 60fps stream. So either you give up frame r...
by dividuum
Fri Mar 24, 2017 12:07 pm
Forum: Graphics programming
Topic: Getting Dispmanx window/layer/element from a X Window
Replies: 3
Views: 2284

Re: Getting Dispmanx window/layer/element from a X Window

If you want to understand how the content of the screen is put together, you can run vcgencmd like this: pi ~ # vcgencmd dispmanx_list display:2 format:XRGB8888 transform:0 layer:-127 src:0,0,1920,1080 dst:0,0,1920,1080 cost:1156 lbm:0 display is the Diplay for that layer: 2 being HDMI/analog, 0 bei...
by dividuum
Sat Jan 28, 2017 12:29 am
Forum: Graphics, sound and multimedia
Topic: Digital Signage on RaspPi3
Replies: 21
Views: 76455

Re: Digital Signage on RaspPi3

I'll add another option with the info-beamer hosted service. It has subaccounts (on request) as well as the easiest installations of any Pi based solution (just unzip to an SD then boot). Unlike other solutions it doesn't depend on a sluggish browser but uses all the hardware acceleration features t...
by dividuum
Mon Jan 16, 2017 3:46 pm
Forum: OpenGLES
Topic: Texture uploading performance
Replies: 2
Views: 4580

Re: Texture uploading performance

I am really curious to know if you have figured out anything new related to this. Not really. There seems to be some way of directly mapping GPU memory into userland memory, but I got some GL error (sorry, don't remember which) when I tried that briefly. See https://github.com/raspberrypi/firmware/...
by dividuum
Thu Nov 24, 2016 10:35 pm
Forum: Advanced users
Topic: Release the framebuffer
Replies: 2
Views: 876

Re: Release the framebuffer

You can probably just force omxplayer to use a more foregroundy layer. I don't have a Pi nearby, but I think it's the --layer argument for omxplayer. Use something like 200 and you'll probably see the video layer again. If you're interested in what's going on behind the scenes, you might have a look...
by dividuum
Mon Nov 14, 2016 9:11 pm
Forum: General programming discussion
Topic: Tachometer
Replies: 2
Views: 1076

Re: Tachometer

You might have a look at my program info-beamer. There is example code for it that displays gauges that you can control remotely by sending udp packets to info-beamer.

Here is what a user build with that for his boat: https://www.youtube.com/watch?v=s6YJ4oqvQZM

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