Support >> Sales FAQs

Pre-sale Inquiry

What is your license policy?

Please read our license here.

How do you provide tech support and bug fixing?

We provide free tech support and bug fixing.

Do you provide the source code of all the libraries and demo programs?

Yes, the whole source code will be provided

How to get an invoice/receipt after I paid for Happytimesoft products?

Go to the page, enter your order number and email address, you should find your order with a link to your receipt. If not, please contact the REGNOW support at

What’s the “Extended Download Service” on the purchasing page, must I pay for it?

The “Extended Download Service” is offered by SWERG/REGNOW, our partner in online purchasing platform, who keeps the copy of your download for about one year. For more information, please check here

It is automatically included when you click to pay for products. To include the service means that you would like to give an extra pay for it. To exclude the item in SWREG/REGNOW, click on the trash button in the “Remove” column and then click the “Update” button to save the change.

How to agents of our products?

The affiliate program please refer to:
The product list or details please email to

What is the difference between the onvif server and the multi onvif server?

The multi onvif server can simulate many onvif devices, the onvif server only simulate one onvif device.
The multi onvif server also can simulate one onvif device.
If you are running multiple instances of Onvif server on one device, this will result in port conflicts, the multi onvif server is to solve this problem.

What is the difference between the onvif client and the onvif client library?

The onvif client use the onvif client library, it also include UI, rtsp client, video decoder and render functions.
The onvif client library is the onvif client protocol stack.