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Questions tagged [gpu]

Use for questions about the Broadcom SoC (BCM2835/BCM2836) Graphics Processing Unit.

-6
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1answer
42 views

Issues with PI and faster VC4 alternatives [closed]

I am aware that there has been alot of questions about using dedicated Nvidia or AMD GPUs with the Pi (I have asked a few of them). But ARM (mali core ) and Vivante among other companies appear to ...
0
votes
0answers
207 views

Does the new VLC in Raspbian support hardware accelerated convertion?

A new version of VLC in included in recent version of Raspbian, with hardware acceleration support. Can it use hardware acceleration while converting videos (of supported codecs like h264)? If so, ...
0
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0answers
66 views

GPU accelerated Chromium on Alpine linux only works without sandbox

I'm trying to build a headless kiosk using alpine linux with chromium. However, I'm only getting GPU assisted compositing if I run chromium with --disable-gpu-sandbox or --no-sandbox. This would have ...
1
vote
1answer
49 views

Use a raspberry pi as a GPU for another raspberry pi

I have 2 Pis, a original B+ and a 3. The B+ was used every day as a desktop PC for 4 years with overclocking, so it is pretty worn.So now I use the 3 as a desktop and try to run DOS games in DOSbox on ...
0
votes
1answer
141 views

Use Pi as simple GPU for PC?

I have seen some many examples of connecting an external GPU to the PI but I want know if the reverse is possible whereby the RPI GPU can be accessed via a PC. The use case is to use the PI as a poor ...
2
votes
1answer
33 views

Accessing GPU memory content

I'm currently working with advanced picamera parameters. A new functionnality to come is the "lens shading correction", a RGGB array that modify the image generated by the camera in order to ...
1
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0answers
60 views

Raspberry Pi processing power [closed]

I've never worked with Raspberry Pi's, but I want to make some cute interactive shaders to put around the house and I was wondering if I could use a Raspberry Pi. I just wanted to know what one is ...
0
votes
1answer
95 views

Is there a way to drive the display via HDMI from a systemd service

When my Raspberry PI starts it will start a process using systemd. At this point the display of the PI will be the standard PIXEL desktop. This process does not run as root. What I am looking for is ...
0
votes
1answer
192 views

Frequency bands from FFT (audio visualizer)

I'm currently working on an audio visualizer running on a 64x64 LED matrix, and some tests showed that the Pi1 is totally capable of doing that. I'm receiving raw PCM audio data using PortAudio, and I ...
8
votes
3answers
4k views

WebGL does not work properly on Raspberry Pi Chromium Browser

I have a problem with WebGL on Raspberry Pi 3's Chromium browser. I did the settings required but nothing happened. Here is my information Device : Raspberry Pi 3 OS : Linux raspberrypi 4.9.80-v7+ #...
0
votes
0answers
29 views

Can I do colour conversions on the GPU?

I'm using python with OpenCV. I need to do colour conversions such as yCrCb and maybe HSV and gray-scale. Using python, can I do this on the GPU? I'm using a resolution of 320*240 on the Pi 3.
0
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0answers
578 views

Is there a way to check out the GPU usage (how busy it is) on a RPi3? [duplicate]

I have a Raspberry Pi 3 Model B and would like to know how busy the GPU gets when I run certain tests to determine whether it would be possible for me to do certain things. I see that the GPU is a bit ...
4
votes
1answer
358 views

Raspberry Pi 3 on Android Things OS for 40 inch display (Graphics Issue)

I am working on a project where I need to run videos on a 38"-40" inch LED TV. Mp4 (720p) videos don't run as seamlessly as needed. It is not the worst in the world but I can see that it is missing ...
1
vote
1answer
264 views

Show multiple HD streams at once on raspberry pi?

We have a situation where we have a large number of incoming HD video streams which we would like to monitor in a way similar to this wall of monitors each showing 16 channels. This can probably be ...
3
votes
1answer
3k views

Unable to set GPU memory split on Raspberry Pi Zero W

I have looked everywhere (both on and off StackExchange) for this but cannot get an answer: I have a Raspberry Pi Zero W, which has 512MB of RAM total. I am running it headless, so I want to ...
0
votes
1answer
724 views

Overclocking GPU on raspberry pi 2 model B?

I'm trying to overclock the GPU on my raspberry pi 2, but I can't seem to find out how. Also, there's no setting for it in config.txt? Does anyone know where I might be able to find this setting (...
0
votes
1answer
325 views

Interfacing pygame with dispmanx - performance

I'm working on a graphical application, made for console mode, and facing some performance issues when working with large resolution (1920px wide here). One part of the display, a video background, ...
2
votes
0answers
195 views

How to force GPU memory to 0 on a headless server [duplicate]

Is there any way to force the shared memory to 0? I'm running Jessie on a pi3 (and a pi2 and a few zero-w's) as a headless server and only ever access it via SSH or a WebUI for certain services. I ...
1
vote
1answer
944 views

How will leaving the default GPU memory setting at 64 affect my installed packages

I left my default GPU setting at 64. Will this affect my installed packages in a negative way? I have a raspberry pi 3 and I am getting the hang of things so if there is a better setting I would like ...
2
votes
2answers
371 views

Why does Raspberry PI use GPU for loading bootloaders and configuration

There is a great explanation of the boot process - What is the boot sequence? But I can't understand why GPU is responsible for doing all that work. Could someone explain this decision? I can't ...
8
votes
1answer
1k views

Chromium tab crashes if mp4 video with GPU acceleration

I maintain a distro that runs chromium called FullePageOS. I added gpu acceleration, but now mp4 video crashes the chromium tab when its viewed (mpeg works). How can I fix this? Alternatively how do ...
0
votes
1answer
514 views

Compile Raspivid from userland

I downloaded the userland repository from https://github.com/raspberrypi/userland and I wanted to compile just RaspiVid.c file. It's because I wanted to use the RaspiVid.c code in my project. But i ...
14
votes
3answers
7k views

Raspberry Pi 3 has less than 1GB memory available at OS level

I don't know if it is a critical issue or not. But, I need to get rid of the question marks in my mind. I recently purchased a Raspberry Pi 3 board and while I was playing with it, I realized that ...
2
votes
2answers
2k views

Fatal Error: GLES2/gl2.h: No such file or directory

I'm trying to install Urho3D on RPi 3. (GPU = 768 MB) I installed all the essential dependencies. All the steps went fine. Until this error which occurred during the final make step: [ 56%] Building ...
2
votes
2answers
932 views

eglGetDisplay() fails on RaspBerry 3

When called on a PI3, eglGetDisplay(EGM_DEFAULT_DISPLAY) stops the program (tried with some test programs like hello_triangle2) and displays this message: * failed to add service - already in use ? ...
1
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0answers
261 views

What should Pi 3 CPU/GPU split be for command line boot to run MJPG-Stream

The Raspberry Pi 3 - now has 1GB RAM, and older docs have always recommended 128M GPU split for most of the video streaming apps I've looked at - but a lot of them refer to 512M RAM limit in the older ...
-2
votes
1answer
17k views

Raspberry PI 3 Increase Gpu Memory to 944 [closed]

I use Raspberry PI 3 and wnat to get more GPU memory to work. I overclock my PI to get more performance because I use it for home Apache/PHP/MySQL server, Access Point and somethimes play music and ...
2
votes
1answer
814 views

300 MHz (3D core) / 400 MHz (VideoCore IV) difference?

For the Raspberry Pi 3 it's mentioned here that the GPU has a 400 MHz (VideoCore IV subsystem) part and/or a 300 MHz (3D core) part. BCM2837 runs most of the VideoCore IV subsystem at 400MHz and ...
2
votes
1answer
11k views

Pi 3 GPU overclocking ability

As far as I am aware the Pi 3's CPU is currently not overclockable, its maximum clock speed is set at 1.2GHz. But what about overclocking the GPU? Is it even possible? And would I see performance ...
5
votes
1answer
100 views

Is there way get the GPU-load average per second?

I am interested to get the GPU-load average over, for example, an interval of one second. Alas, I was unable to find a direct way to get this information with the current API or tools ( vcgdb or ...
1
vote
1answer
99 views

Why does audio playback seem to depend on GPU memory?

I encountered a really odd behaviour with my Raspberry Pi B+, running a slightly modified version of Raspbian with a PiTFT screen from Adafruit. Because the screen cannot access the GPU I dialed down ...
4
votes
1answer
2k views

Using GPU to decode QRCODE

I'm using a raspberry pi compute module and my question is : Can we use the GPU to decode QRCODE ? I am using my own function inspired by the one from QRTOOLS and by doing so the timing is divided by ...
1
vote
1answer
1k views

Temperature differences between CPU & GPU

So recently I was interested in CPU and GPU temperatures and did some work displaying the temperatures in real time on a page and also recording the temperatures on a graph using rrdtool (which is ...
6
votes
1answer
133 views

GPU Unified Memory?

Is it possible to access the memory the GPU is allocated on the CPU? For instance if I'm running a 3d application and I wish to edit a lookup table which is in a texture, is it possible to access the ...
4
votes
5answers
41k views

How to connect a graphic card to Raspberry pi?

I want a way to connect a graphic card like nvidia or amd to raspberry pi do you think has a way to do that?
8
votes
1answer
2k views

Differences of Raspberry Pi models in GPU computation?

I know the publication Biosignal PI, an Affordable Open-Source ECG and Respiration Measurement System which uses Raspberry Pi A+ / B+ as a component isolated by ADums, since RP is not itself a medical ...
3
votes
1answer
224 views

How do I view gpu / h.264 block usage?

Normaly I can get this infromation from psensor but on the pi the only monitors i have access to are cpu and ram usage.
3
votes
1answer
1k views

How to display a GPU surface on a afafruit TFT screen?

I'm playing with a PiTFT Plus display on a Raspberry Pi 2 using the Adafruit modified version of Raspian Jessie for this screen. The display looks ok for most things, but I'd like to play a video ...
3
votes
2answers
933 views

How do I read the GPU temperature in C?

I am making a graph on the temperature using a NTC resistor and also by reading the CPU temperature, however I'd also like to read the GPU temperature. I read this answer explaining briefly how to ...
2
votes
0answers
342 views

Maximise GPU usage on a headless Raspberry Pi

I have a headless Raspberry Pi 2 model B and my goal is to maximise the heat output from the CPU/GPU IC. I've successfully maxed the 4-core CPU by running 4 instances of: yes > /dev/null & ...
0
votes
1answer
255 views

Applications that can utilize raspberry pi 2 Model B's GPU

Are there raspbian compatible applications that can utilize the GPU of the Raspberry PI other than omxplayer?
3
votes
1answer
735 views

Memory split - How much is the GPU responsible for?

I am using my Pi2 to run some Python scripts that are heavily use the CSI camera (being pulled with the picamera module), being processed with OpenCV, and draw a GUI to screen (using the PyGame module)...
5
votes
2answers
1k views

Persistent rainbow test pattern

I've got an install of arch linux on my B+, but the test pattern is showing in the upper-right corner of the screen even well after the OS is fully booted. It disappears every now and then, but comes ...
2
votes
2answers
6k views

How to get the most out of the raspberry pi 2 GPU?

I just purchased the raspberry pi 2 and I was trying to use it to make my "non-smart" TV a bit smarter. Basically, instead of connecting my laptop (via HDMI) to the TV every time I wanted to watch ...
2
votes
1answer
468 views

What's the smallest amount of memory that can be allocated to GPU?

According to http://elinux.org/RPiconfig#Memory , the minimum that can be specified in /boot/config.txt is 16MB. Is there a way to shut off video completely and allocate nothing? I'm asking about ...
11
votes
6answers
61k views

Raspberry pi 2 1024M Increase Gpu Memory to 512 at least

I have a Raspberry B and a Raspberry 2. In the B model, I set the config file to gpu_mem_512=256 in order to get more memory for the graphics. It works fine. If I type the command vcgencmd get_mem ...
2
votes
1answer
259 views

Can we now use the DSI cnnector?

Now that the GPU source has been made open source, will we be able to use the DSI connector to power display panels?
7
votes
1answer
9k views

Hardware-accelerated h264 encoding possible?

The Raspberry Pi will do hardware accelerated h264 encoding when recording video from the camera board. How can I encode h264 (using hardware acceleration) when the source images are not coming ...
5
votes
1answer
1k views

How to achieve gpu_mem=8?

I see some people claiming (see links) they have a memory splitting of gpu_mem=8, but I always thought 16/496 is the minimum split? Here is an answer on this very page: https://raspberrypi....
0
votes
1answer
1k views

RaspiCam use GPU to stream h.264 video over TCP

Is there a way to stream the 1080 30p video from the RaspiCam over TCP to use it as surveillance camera in common software? In my case I'm searching for the possibility to stream to my Xeoma server ...