OK, I need some very very basic pointers for working with Video.
I have a few camera modules that mostly transmit analog NTSC. I want to be able to save video to an SD card.
I have spent the last few days looking for information on this and it seems to be missing in many of the forums.
I really just need a start…I understand I may need a dedicated chip to process the video.
Thanks for any help.
This is extremely difficult unless you have a very powerful system with dedicated hardware for video input.
Instead, you digital cameras, serial or ethernet, and then you can get the images and save on SD cards easily with FEZ
This will really not be easy.
First you will need a video decoder like ADV7180, see [url]http://www.analog.com/en/audiovideo-products/video-decoders/adv7180/products/product.html[/url]
That outputs data in a 8 bit format called ITU-R BT.656. But as this chip doesn’t have such an interface, you will have to connect the decoder to an FPGA for buffering/compression. Then you can connect the FEZ to the FPGA.
But then you might just as well connect the SD card to the FPGA as well and run a soft core CPU in the FPGA to do everything. Although that CPU isn’t programmed in C#, but neither is the FPGA…
FEZ is not realtime, it cannot handle video. You will want to get an analogue to digital decoding chip and then use something like an ARM7 or 9 (no .netmf) or an FPGA to convert this to your AVI/MPEG encoded stream. This stream could then be output to SD. This is not an easy task by any means!
Sorry for brining up this old thread.
But is it possible to capture monochrom CCIR (or NTSC) images with an ADV7182 or similar using a G120?
Actually I only need single shot images in production mode.
For adjustment a ‘live stream’ (10 FPS would be enough) via ethernet would be needed as well.
I think more than 1 FPS uncompressen would not be possible (1 Frame > 300kByte)
But would capturing in general be possible if I use RLP?
Are there any RLP compression algos available for G120?
Best would be to add propeller chip of FPGA to handle the very low level and then pass on to G120.
This might be stupid, but: What is a ‘Propeller chip’? Never heard of such a thing.
Googling it did not really answer my question.
I thought more about connecting the ADV to the G120, put an RLP interupt handler on the clock signal and read the 8 Bit data into a frame buffer.
No idea if this can even work.
The Project I would Need this for is as follows:
We have machinies out there with 4 stepper Motors, controlled by ‘stupid’ powerd drives and a single CCIR analog camera.
Everything is controlled directly by a WinXP PC. A simple FrameGrabber for camera, and generating pulses from some routines executed in kernel mode (using Kithara Kernel Driver).
Both is not working on a Win 7/8 System.
So we thought to control the Motors with an G120 and replace the camera by an GigE Camera.
But if we could reuse the camera as well by connecting it to the G120, then the upgrade of the machines would be even easier (and cheaper).
The motors and the camera would never be used at the same time: only move → grab → move → …
Google “parallax propeller” for a start.
Thank you for the hint: found it.
The Q&A says something abou Video Generation, but not capturing (and compression/Streaming) but I’ll get into it, will see.