Tagged Questions

Use for questions about the Broadcom BCM2835 Graphics Processing Unit.

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0
votes
0answers
25 views

control color balance and gamma from hdmi

I'm using the pi to playback video graphics on monitors for film and television. Sometimes the monitors need to be dimmed so they aren't over exposed for the camera. Some monitors will start to pulse ...
2
votes
0answers
550 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 ...
4
votes
0answers
158 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: ...
0
votes
0answers
307 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 ...
1
vote
2answers
1k views

OpenCL w/ Broadcom GPU?

I know this question has been asked and answered before here: Can I use the GPU for calculations? but there have been a number of developments recently, including a hint that there will be more ...
4
votes
1answer
289 views

Why does the Raspberry Pi's GPU control the first stages of the boot process?

According to the answers to this question and other sources, the GPU of the Raspberry Pi's BCM2835 SoC is responsible for the first stages of the boot process, including enabling the ARM CPU. Until ...
1
vote
2answers
284 views

What is the most optimum memory split for streaming pi's as security monitors which you will only ssh into?

I have a few model A's and model B's. I've also read about a few options that allow you to configure an arbitrary split apart from the 16, 32, 64, 128 (and 256 for the B). Any insight would be ...
5
votes
4answers
6k views

Connect a GPU into Raspberry pi

I want to connect a GPU GT640 to a Raspberry pi model B. I know there is not a direct connection and the tranfer data are very differents but. Is there any chance to connect this devices in order to ...
0
votes
0answers
68 views

Opengl fork anyone?

I know it is not possible to use open graphic libs without the embedded systems version, but has anyone figued out how to enhance the gpu just enough to add a fork of opengl?
6
votes
1answer
3k views

Can a Pi be used as an OpenCL CPU device?

Can I use a Pi (or, for that matter, Beagle Bone or Arduino) as an OpenCL CPU device? I understand there isn't much of a GPGPU thing on a Pi, but couldn't I link a bunch together under an OpenCL ...
4
votes
1answer
2k views

Is it possible to do GPU-accelerated tasks on a raspberry pi?

I have been looking into doing some cluster computing on several raspberry pis. Is it possible to use any kind of GPU acceleration on a pi?
1
vote
0answers
801 views

OpenGL ES (EGL) without a window

I'm trying to build a small application that does some image processing. Currently I'm using OpenCV which is a bit slow. This is why I'm thinking to use OpenGL and shaders instead (see this example). ...
1
vote
4answers
2k views

GPGPU simple example

I am programming ARM assembly on raspberry and I am wondering whether and how it is possible to access GPU. I already looked userland repo, but I completely do not understand the stucture. I would ...
2
votes
2answers
945 views

How is memory split by CMA?

The post at http://www.raspberrypi.org/phpBB3/viewtopic.php?f=29&t=19334&p=218282&hilit=cma#p217665 mentions that:- gpu_mem_512=316 cma_lwm=16 cma_hwm=32 In the above ARM has 96M ...
4
votes
2answers
2k views

Voice recognition

I was thinking about creating a kind of Jarvis computer (Iron man). Only then a (little) bit more minimalistic. What I want to built is more of a question/answer type of application (something like ...
0
votes
1answer
208 views

How to allocate GPU processing power to accelerate internet speed?

From my question about the Pi's slow internet I learned that the main bottleneck is the dismal CPU speed. Is it possible for me to use the GPU to handle the information instead (or perhaps in addition ...
6
votes
1answer
3k views

OpenCL / GPGPU programming coming soon?

Last June the answer was a qualified no: Can I use the GPU for calculations? However, the Videocore driver code was open sourced towards the end of 2012: http://www.raspberrypi.org/archives/2221 - ...
7
votes
4answers
17k views

Get CPU and GPU usage on Raspberry Pi

I am trying to figure out a good split for the CPU/GPU. Is there a way to monitor the CPU and GPU usage to see where I should make the split?
4
votes
1answer
1k views

How to: build a graphics cluster

Currently, I am waiting for my second RPi to arrive and then I will begin my fun building a RPi cluster. Also, later I want to extend it more and more. =) I am building it at home, home-experiment, ...
8
votes
2answers
5k views

What speed can I expect from the hardware-H264-encoding?

I stumbled over the Wikipedia-article that the Broadcom GPU has hardware support for encoding H.264/AVC, not only de-coding. I also found an article where someone gave an example using ffmpeg to ...
4
votes
2answers
6k views

VLC Hardware acceleration

I'm new to Raspberry Pi. I am trying to develop a media player that would use a library like libvlc to do the decoding. Now the problem is that I can't get the hardware acceleration going... I have ...
18
votes
3answers
9k views

How can I change the RAM split?

By default, the Pi is set to a 192MiB:64MiB RAM:VRAM split. As I will not be using the pi for graphical purposes, I would like to change the split to allocate more normal ram to ease swap usage.
49
votes
2answers
48k views

What is the optimum split of main versus GPU memory?

I read that it's possible to allocate either 128MB, 64MB or 32MB to the Raspberry Pi's video memory. Given that my primary use case for this machine is educational: I will be running lightweight ...
11
votes
3answers
1k views

Is it possible to mine Bitcoins?

Obviously, the RPi can be used to mine Bitcoins on the CPU, but this would be very slow. Is it possible to use the GPU to mine Bitcoins?
13
votes
1answer
5k views

Running 1080p video from within XOrg smoothly

The 1080p examples that work outside of X.Org run very smoothly on my Pi, but within X.Org they don't run very smoothly at all at the moment. Given that X.Org is currently not GPU-accelerated, this ...
40
votes
5answers
10k views

Is there a GPU accelerated Xorg server?

At present all of the official builds of the X Window System run on the CPU, which takes up a lot of processing power and runs X rather slowly. I know there's no official GPU accelerated version of ...
62
votes
3answers
12k views

Can I use the GPU for calculations?

Is it possible to use the GPU for calculations? (e.g. CUDA/OpenCL)