Overlay

[actom]

Hi,

Is there a way to overlay GPS information onto a live video stream from a PI camera module. I don't want to superimpose the information in post production.

[MarkHaysHarris777]

Of course there's a way...

... all you need to do is conceive it, believe it, research it, and then make it happen. The Raspberry PI comes with some rudimentary 'drivers' for the camera module. All of that code is open source. All you need to do is write your own 'driver' and overlay what ever you want in your live video stream... audio effects, date-time, gps, whatever you can imagine and research.

No, I have not done this yet... in fact, I'm still waiting for my camera module to arrive... Monday I think UPS said... I'll let you know how it goes, but I'm really pumped about it!

[ame]

Of course there is a way. If either of you could use Google you'd be able to find it.:
http://picamera.readthedocs.org/en/latest/recipes1.html

[MarkHaysHarris777]

I love that answer!

[actom]

Thank you for your replies.
As you might have guessed I am new to this and will try my best to make it happen.
In the meantime any help to point me in the right direction is much appreciated!

[gordon77]

Here's a simple program to get you started, just added a GPS bit to the picamera example pointed to.
Assumes the GPS is plugged into the USB.

There are probably far better ways to format the text required.

Gordon

Code: Select all

#!/usr/bin/python
import serial
ser = serial.Serial('/dev/ttyUSB0',4800,timeout = None)
import picamera
import datetime as dt

with picamera.PiCamera() as camera:
    camera.resolution = (1280, 720)
    camera.framerate = 24
    camera.start_preview()
    timelatlong = ""
    camera.start_recording('timestamped.h264')
    start = dt.datetime.now()
    while (dt.datetime.now() - start).seconds < 30:
        gps = ser.readline()
        if gps[1 : 6] == "GPGGA":
           timelatlong = gps[7:9] + ":" + gps[9:11] + ":" + gps[11:13]
           timelatlong = timelatlong + " " + gps[18:20] + "." + gps[20:22] + "." + gps[23:27] + gps[28:29]
           timelatlong = timelatlong + " " + gps[30:33] + "." + gps[33:35] + "." + gps[36:40] + gps[41:42]
        camera.annotate_text = timelatlong
        camera.wait_recording(0.2)
    camera.stop_recording()

[knotty]

Hi,

I read your post with interest as I'm in the process of building a computer on onboard a rocket based on the Pi Zero W, Powerboost 1000C and BerryGPS-IMU v2. I've successfully implemented your script and I'd like to see if it can display additional information however I've no experience with Python.

Could you also display the speed, course and altitude from the NMEA sentences?

Furthermore, I'm assuming more complex, but could data from other scripts also be included in the overlay? In addition to GPS the BerryGPS-IMU v2 also has an accelerometer, gyroscope, magnetometer (compass), barometric/altitude and temperature. I've got their scripts (attached) working on the command line but I'd appreciate some help getting these integrated into the overlay.

Thanks in advance.

Regards,
Paul.