Questions tagged [camera]

Use the Camera tag for any questions related to how to use a camera or webcam with the Raspberry Pi.

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1 vote
2 answers
997 views

Compiling WiringPi (GPIO input) into raspistill/raspivid

I want to synchronize a stereo camera for either stills or video. The goal is the smallest possible delay between GPIO trigger input and camera shutter actuation (so that stereo is possibly in sync) ...
1 vote
1 answer
465 views

Activate RPI-cam with rfid signal

Can anyone give me some advice on the next. Is it possible to activate the RPI-cam with a signal from a rfid reader? Here's the practical enviroment. I am a pigeon fancier and my pigeons are ...
2 votes
1 answer
424 views

Does anybody else experience micro-freezes with the Raspberry over wifi?

whenever I connect my Raspberry Pi over wifi to the LAN, I sometimes get micro-freezes when streaming video from the Raspberry or when I connect over ssh. It seems kinda periodic. The freeze/lag has a ...
2 votes
0 answers
800 views

Raspicam API cannot compile programs

I have installed the raspicam api as per the instructions. There were no errors. Now when I try to compile the example programs or any of my own programs using the API, I get the compile error: ...
2 votes
0 answers
702 views

Raspberry Pi Camera Module As A Streaming Webcam Commands

mmal: Skipping frame 2 to restart at frame 5 mmal: Skipping frame 6 to restart at frame 10 mmal: Skipping frame 11 to restart at frame 16 mmal: Skipping frame 17 to restart at frame 22 mmal: Skipping ...
1 vote
1 answer
9k views

How can I connect RPi camera to desktop computer?

Basically USB cameras are too rubbish for what I'm trying to do, and I'm trying to develop for the RPi but the RPi is just too underpowered to develop image processing stuff on. Is there any way I ...
0 votes
1 answer
198 views

How do i save pic to the same png rather than creating a new png each time a pic is taken

i have a question, How do i save pic to the same png rather than creating a new png each time a pic is taken this is the command that execute the pic: *cd ~ mkdir picture cd picture screen ...
3 votes
1 answer
3k views

I don't get 24 frames per second

Although the camera framerate has been set to 24, 24 frames are being captured at 3 seconds. Wondering where I am going wrong?? I need to convert the stream to an OpenCV object to do further image ...
-1 votes
1 answer
3k views

same problem, camera rpi not works ENOSPC

i have raspberry pi Type B and i am trying to attach camera into it, all i have done is upgrading dist and firmware sudo apt-get update sudo apt-get dist-upgrade sudo rpi-update all firmware is ...
2 votes
1 answer
1k views

RaspiCam spot metering: where's the spot and how to move it?

I'm trying to use the Pi (NoIR) Camera to record a timelapse that needs to produce good results both during day and night. By default, I don't get a correctly exposed result under all conditions. I ...
2 votes
4 answers
2k views

What software library is avaliable for RPI camera module?

Where can I find software library to play with camera module? What is the quality of images? Is there any page that explains how camera module works? Does the image processing module use NEON?
1 vote
0 answers
70 views

USB camera originally designed for PC hardware and kernel 2.x

I wonder if this is off-topic. Basically, I want to get some idea before spending expensive money on international mail order. The question is really getting comment on how compatible is Linux on ...
4 votes
3 answers
4k views

Using the Raspberry Pi Cam at 110 degrees Celsius

A CCD camera is required to be placed in a hot environment of up to 120 deg Celsius. I am thinking of using the Raspberry Pi Camera Module which I already have. However I am unable to find any specs ...
8 votes
2 answers
6k views

Are there any alternatives to the Pi Camera?

What sort of support is there out in the wild for non-official cameras which are supported by or compatible with the Raspberry Pi, with or without use of the special interfaces?
5 votes
2 answers
6k views

Connection for 6 raspberry pi camera modules? [closed]

Any ideas, I want to configure 6 cameras for 360 degree view
6 votes
2 answers
14k views

CCTV housing that fits the Raspberry PI [closed]

I'm looking for a CCTV housing that fits the Raspberry PI and the camera board in for under £10 (or very near to £10). It needs to be: waterproof / made waterproof with silicon sealant at least ...
3 votes
1 answer
8k views

Receiving this Error with RPi camera module: mmal received unexpected camera control callback event

This error appeared two weeks ago when using the camera module. I searched on the internet and came to a conclusion that my Raspberry Pi camera module was defective. I just received another camera ...
4 votes
3 answers
4k views

ir filter on the camera

I am wanting to know if there is an infrared filter on the Raspberry Pi camera. I am wanting to use the Raspberry Pi for infrared photography but some cameras have a filter that blocks out the ...
1 vote
1 answer
745 views

Cant get motion to start

I'm trying to set up raspberry pi for a timelapse. I have installed motion, but i cant get it to start. I have tried to start it as a daemon. It seems to start, but when i run ps aux | grep motion ...
2 votes
2 answers
1k 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 ...
2 votes
1 answer
2k views

Using Pan and Tilt servos

I am trying to get pan and tilt camera working with Raspberry Pi. I have successfully gotten one servo to work following this tutorial: I also found this tutorial showing pan and tilt, although it ...
2 votes
2 answers
2k views

Edge Detection using usb webcam

Can I use sobel edge detection or canny algorithm to detect edges in my RPI. Can any give me any link to how to accomplish this and what the prerequisites are for doing this?
6 votes
1 answer
7k views

Autostart videostream without logging in

I am trying to auto-start a script, that starts a video stream via vlc on a raspberry pi with raspi camera. This is the code that starts the stream: raspivid -o - -t 0 -hf -w 640 -h 360 -fps 25 | ...
1 vote
3 answers
736 views

Camera blinks but doesn't record

I am trying to start a stream on my Raspberry Pi Camera when I boot the Raspberry Pi. I have tried the following options: Using crontab @reboot /home/pi/video.sh & Using init.d Copied the script ...
1 vote
0 answers
203 views

Camera Full Preview stops display

Using raspistill -fp -o test.jpg causes my monitor (actually a tv) to receive no input (just get a blue screen) for the duration of the preview. This also happens using the python picamera module with ...
1 vote
5 answers
869 views

Advice on RPi taking high res pictures at timed intervals

I'm working on a project with my Raspberry Pi at the moment. I'll give a brief summary of what I'm trying to achieve. I would like my RPi to take high resolution pictures through a USB webcam at ...
0 votes
4 answers
6k views

What do I need to setup in order to push a video stream to the web

I'm interested in using a Raspberry Pi and some webcam to stream video to the web. First, I would need to know how to setup the webcam. Second I would like to know if it is possible to push a ...
0 votes
2 answers
797 views

Is it possible to set the desired DPI of an image created using raspistill?

I realize that the amount of information taken by raspistill is the same regardless of the DPI of the output, but nonetheless - is it possible to set this on the command line? If not, what utility ...
1 vote
2 answers
3k views

What is the best way to capture still time-lapse from logitech C920 on raspberry pi

I'm looking to use a Logitech C920 to capture still images (which I will later sew into a time lapse) Is it possible to use raspi-still to do this? I've read about the streaming solutions and using ...
6 votes
5 answers
4k views

Raspberry Pi as surveillance cam?

I want to use the Raspberry Pi and the camera board as surveillance camera: As soon as a movement is detected, an event shall be raised, e.g. a mail sent. What I am wondering about: Do the typicall ...
5 votes
1 answer
1k views

Is the camera module present?

Is there a way to tell whether the camera module is present without actually trying to record a video or take a photo? I thought maybe i2cdetect would show it up since the camera uses the i2c, but it ...
0 votes
1 answer
5k views

Raspistill fullscreen preview with valid aspect ratio on composite PAL 16:9 display

Software: raspbian, hardware: Pi model B 512 with camera board Display: rear view car display, PAL composite input, 480x272 resolution, 16:9 aspect ratio Goal: I'd like to shot still images with ...
5 votes
1 answer
32k views

Getting correctly exposed photos and the right shutter-speed for the RPi camera board using raspistill

I'm using my Raspberry Pi with the RPi camera board to capture a time-lapse video of outdoor scenery using the raspistill command. As I am uploading the photos to a server after I take each photo, I'm ...
6 votes
2 answers
5k views

Camera Module Turn LED Off

I've made the disable_camera_led=1 change to the sudo nano /boot/config.txt and rebooted my Pi. The issue is the LED has stayed on? How do I turn it off?
2 votes
1 answer
4k views

Calling RaspiStill from C program using WiringPi

I am trying to create a C program that would call RaspiStill or RaspiVid when one of the GPIO's is triggered high. I would like it into fit into this program that I have already created... include &...
2 votes
2 answers
3k views

How to add usb webcam and WiFi to RPi model A without ruinning power consumption?

So I managed to diminish my RPi model A power consumption to the impressive mark of 70mA (underclock + replacing the 3v3 regulator). Low current is important because it is a mobile app (robot/car ...
1 vote
1 answer
928 views

MMAL Raspberry Pi Speed

Does anyone know if there is a way to improve the speed of taking photos with raspistill? I have a Python program which basically calls "subprocess.call" - I've noticed that the speed of such an ...
28 votes
2 answers
4k views

Can I use a USB webcam?

Is it possible to use a standard USB webcam with the RPi, or is there a specific peripheral that should be used? I would like to use RPi's to stream images from webcams to the net.
3 votes
0 answers
369 views

Show *modified* video from camera on screen

There are many tutorials how to show video from camera on screen (like this one). I need to modify video stream with simple but custom filter. Stream may be low-res, so CPU should have enough juice. ...
1 vote
1 answer
3k views

raspivid option -n together with ‐awb or -ev

When I run raspivid with -n option I cannot use options -awb and -ev does not work either. My goal is to use camera in greyscale mode without a preview window. When I tested with -ev off then video ...
5 votes
2 answers
8k views

WPUT is uploading pictures captured by Motion over FTP, but JPGs are blank?

I have been following this guide here and have got everything to work except the images being uploaded to my server are all blank. Here is an example of one of the blank image files. The JPGs ...
1 vote
1 answer
2k views

Unable to use time lapse feature with RaspiStill

For some reason RaspiStill has lost some of its functionality. When I tried to use the -tl argument it doesn't produce any photos and seems to hang up. The full command I am running is: raspistill -...
4 votes
2 answers
4k views

Setting up an IP Camera on raspberry pi

I'd like to setup my raspberry pi to work as an IP Camera. Can you please point me to guides on how to do that - I am unable to find resources in particular for the two-way audio part of it. I am ...
0 votes
1 answer
2k views

the script can't take picture with raspberry pi camera?

I am running a simple program on the raspberrypi camera, 'raspistill' works in the command shell, however when it comes to program it on python, the simple script doesn't seem to take pictures for me, ...
3 votes
1 answer
927 views

How to access raw video data from CSI camera?

I'm developing an augmented reality sort of app for the Pi, but I need access to the video data (pixel data) to tweak things programmatically from a C program, then display the modified frames. How ...
6 votes
1 answer
3k views

What method should I use to track a moving object with a moving camera (using resources of RaspberryPi)

I'm playing around with motion detection through a webcam connected to RaspberryPi using OpenCV and cvBlob in C++. I want to kick it up a notch and make a robot that detects and tracks movement ...
1 vote
1 answer
127 views

Camera board and reflective strip

Trying to use the Raspberry Pi camera board to capture an image when it "sees" a reflective strip. Is this possible? How could I go about doing this?
3 votes
1 answer
803 views

How fast should the camera board be?

What is a reasonable speed to expect from the raspberry pi camera board? It seems to take about 15-20 seconds per photo in some cases - is this just how it works or are there some hidden settings ...
5 votes
1 answer
19k views

How can I run a terminal command (bash) from C#/Mono?

I've got an asp.net mvc website up and running great on the pi, and I'm even blinking an led - however, I would like to take a picture from the site using the raspberry pi camera board. I am ...
1 vote
1 answer
11k views

How to read values with pyserial?

I'm using a CMUCam4 connected to the usb port. So far I've tried this: import serial cam = serial.Serial("/dev/ttyUSB0",19200) cam.write("GV \r") #call get version result = cam....