Hdmi to usb 2/3

On 05.06.2015 22:34, John Stefanidis wrote:

Well i am fairly new in electronics so forgive me if my question is too

stupid to be explained...

 

I have a new compact nikon digital camera with hdmi out the camera is

capable to feed my tv with my footage in real time...Yet i cant find a

way to use it as a webcam (which I find strange since it also has an usb

out ) Also I didnt find a way to make it work as webcam (without

spending 700$ or more that is... ) and I cant explain that to myself ...

the camera is capable to output a 1080p@60fps signal to my television in

real time yet my much more sophisticated PC cant make any use of it to

simply skype with or what not... So I decided to start a project

prototyping a board that has a hdmi in and replicates that signal to a

usb 2.0 or 3.0(if its needed to maintain the cameras full hd resolution)

and for that I would like you to give me some guidelines and resources

to read and master them in order to achieve my goal...

 

I mean how hard could it be?  there is no conversion digital signal will

come in and out it will be the same signal no compression would be

necessary (since its already compressed inside the camera and since it

works fine just "plug and play" like when pluging the cameras hdmi out

to my tv) so what I think with my total unexpirienced mind is that I

just need to copy the signal into the usb protocol in order for windows

to see the protype board as a windows recording device and just play the

feed (and thus me being able to use my camera for online

streaming/chatting like for example skype)

Before you start building the project, have a look at sparkocam sw and

see if it can do what you want over the existing usb. It supports nikon

cameras.

If not, there are existing hdmi frame grabbers, look at

http://www.epiphan.com or even ebay.

Its not as straight forward as you think, but with a FPGA and some

"smop" you should be set.

well yes i saw that prior to deciding to try study resources in order to start this project at a later time but I am not rich nor crazy to give 700 euro for that .... if i buy something i will buy this http://gamerzone.avermedia.com/game_capture/live_gamer_extreme that does 1080p @ 60hz with 50ms delay and all that around 100 euro much more honest (and does hdmi to usb3 as well as hdmi to hdmi 2 hdmi in and separate audio in as well) much more honest deal in my humble opinion...

On 08.06.2015 16:50, John Stefanidis wrote:

well yes i saw that prior to deciding to try study resources in order to

start this project at a later time but I am not rich nor crazy to give

700 euro for that .... if i buy something i will buy this

http://gamerzone.avermedia.com/game_capture/live_gamer_extreme that does

1080p @ 60hz with 50ms delay and all that around 100 euro much more

honest (and does hdmi to usb3 as well as hdmi to hdmi 2 hdmi in and

separate audio in as well) much more honest deal in my humble opinion...

But you saw the claim "Use Canon / Nikon DSLR camera as a regular

webcam" at sparkocam's website?

well no but I dont need to all i need to know is that it accepts full hd video signal input (which is what a canon nikon or whatever camera with hdmi out will give) and push it through usb 3(or hdmi) as video stream of a "video adapter" that is compatible with xsplit for example and skype and if those programs can see it as a video device any program that one could possibly care of (e.g voodoo, chatroulette,open broadcaster, manycam or what ever) would see it as a video adapter as well.

well no but I dont need to all i need to know is that it accepts full hd video signal input (which is what a canon nikon or whatever camera with hdmi out will give) and push it through usb 3(or hdmi) as video stream of a "video adapter" that is compatible with xsplit for example and skype and if those programs can see it as a video device any program that one could possibly care of (e.g voodoo, chatroulette,open broadcaster, manycam or what ever) would see it as a video adapter as well.

On 09.06.2015 11:07, John Stefanidis wrote:

well no but I dont need to all i need to know is that it accepts full hd

video signal input (which is what a canon nikon or whatever camera with

hdmi out will give) and push it through usb 3(or hdmi) as video stream

of a "video adapter" that is compatible with xsplit for example and

skype and if those programs can see it as a video device any program

that one could possibly care of (e.g voodoo, chatroulette,open

broadcaster, manycam or what ever) would see it as a video adapter as

well.

This is just what sparkocam can do. It takes multiple inputs and

generates a virtual webcam that you can use in any sw. And you can add

picture in picture over your face (coming from the canon) if you like,

share your desktop like a webcam and so on. It can even take normal

webcams in, so its a real soft video mixer.

What you are talking about is a frame grabber. Of course you can make

one yourself. It takes a lot of effort and is no straight forward job.

Ive already tried sparkocam but it didnt work and thats why i decided to check into this in the first place (because apparently it only works with some DSLR variants of canon and nikon and not every canon and nikon) + its expensive while you can do the same thing (actually better with manycam which is free

and what are we are talking about here i didnt get it? I am asking about resources or an other sort of help on this subject and you are giving me links with items i already mentioned i dont need/want because of price etc and then you are telling me its not straight forward well thank you for your time but this is not helping at all and I already talked about most of this on the other posts above so i dont know why you like to rewind things without adding something new.. anyway.

You could search for ADV7611 datasheet, which shows how to get the HDMI signals into pixel data. That's a start.

But, you say

John Stefanidis wrote:

 

Well i am fairly new in electronics

so I'd be highly surprised if you can manage to use that 64-pin LQFP let alone design it into a circuit based on the information in the datasheet, without several years of study.

To do that study, you could try to read some books to get up-to-speed, but there are no books nor websites on "how to design a frame grabber with HDMI and USB" - so you'd be forced to buy multiple general books and learn the basics and apply that knowledge to your particular scenario. Each book would cost >$100, especially for your programmable logic if that's what you're planning to use. If you want to go that route, Amazon lists books on programmable logic along with reviews, so the Internet will help you here. Expect to spend >$1k for the books you will need to cover the areas of the design, because it requires programming knowledge, digital systems design knowledge, basic circuit theory, and so on.

Not the answer you want to hear (as you keep saying), but it is what it is. There is a reason people keep saying "buy a frame grabber".

I fail to see how a newcomer could proceed without _significant_ help (perhaps a paid contract if you have money to spend) or several years of study.

EDIT: You can see all the parts you could use in the photo in this brochure here:

http://www.latticesemi.com/~/media/LatticeSemi/Documents/ProductBrochures/NZ/USB3Brochure.pdf?document_id=50388

There is also a block diagram to help you there. You could remove the bits of functionality you don't need, since it appears to be a superset of your requirements.

The detailed information (including circuit diagrams) on the ICs will be in the data-sheets for each part. You will have to design and implement the programmable

logic, or pay someone to do it perhaps if you feel you have insufficient experience in that area, or talk to the suppliers mentioned in that brochure.

That should be a great start for scoping the work you need to do. Good luck!!

On 09.06.2015 15:59, John Stefanidis wrote:

Ive already tried sparkocam but it didnt work and thats why i decided to

check into this in the first place (because apparently it only works

with some DSLR variants of canon and nikon and not every canon and

nikon) + its expensive while you can do the same thing (actually better

with manycam which is free

 

and what are we are talking about here i didnt get it? I am asking about

resources or an other sort of help on this subject and you are giving me

links with items i already mentioned i dont need/want because of price

etc and then you are telling me its not straight forward well thank you

for your time but this is not helping at all and I already talked about

most of this on the other posts above so i dont know why you like to

rewind things without adding something new.. anyway.

Sorry for my attitude.

I don't know of any framegrabber chips that can do this off the shelf

(in my profession, I really should have known if there was), but if you

find any, please let me know.

As I said this is no easy task, but if you want to get going with this

large project, I would suggest a FPGA/SoC system, but at least the first

prototype is going to cost you a lot more than buying a grabber. It

would enable you to get the HDMI and USB ip together with a CPU in a

single chip.