Linux, overlay picture on video

Question

linux

There is a task to record video from the camera and on-line, when recording, overlay a picture on the video
(the picture changes over time).
Video size is not less than 720x480, and better in hd.

I see it like this:
— mini comp. The device will be in the car, so the size matters but is not very critical. As far as I could google, there are options for small, almost "pocket" system units on via processors and on arm-s.

- a camera connected to it that records video, the necessary data is superimposed on it (speed in the form of a speedometer, revolutions in the form of a tachometer, throttle position, etc.) and stored on the SD card.

Is there a means in linux to overlay a picture on an "on-line" video while recording? Naturally console tools are necessary.

Are there HD cameras that can be connected to a computer?

Maybe it makes sense instead of a PC to try to find some platform with android?

PS: I'm not asking for a specific solution, I'm interested in directions, where to look and by what means you would solve this problem.

Answer 1

Dig, definitely, in gstreamer. There is already a cairotimeoverlay plugin, I think it will be the easiest to open it.

Answer 2

mencoder can do some simple effects. the main question is how will the program receive the video stream?

Answer 3

> Are there HD cameras that can be connected to a computer?
Webcams with usb2 do not roll?

Answer 4

You can also use ffmpeg for this, for example, like this:
ffmpeg -i video_input -vf “movie=image [logo]; [in][logo] overlay=10:10 [out]" output_video

Answer 5

With the help of the OpenCV library, you can quickly do. Especially if in the future there will be a more difficult task than overlaying the picture.
There are HD webcams from Microsoft, they even shoot well against the sun. Or look online.