I buy a Seetec HDMI to USB3.0 capture from Alibaba Trade Assurance.
I think it is a really nice tool.So I would like to share it here.

-No drivers to install and works with most software on PC and Mac.
-Allowing live video streaming, webcasting or video conferencing to Skype, Facebook Live, Youtube Live,etc.
-Can capture various HD video sources with resolutions up to 1920x1200p @ 60fps.
-Get power from the PC directly.
-USB3.0, 300-350MB/s throughput and it is compatible with USB 2.0 40MB/s.

Input Formats:
Resolutions: 640x480/720x480/720x576/768x576/800x600/1024x768/1280x720/1280x800/1280x960/1280x1024/1368x768/1440x900/1600x1200/1680x1050/1920x1080/1920x1200/640x360/856x480/960x540/1024x576
Frame Rate: 25/29.97/30/50/59.94/60 fps

Output Formats:

The Support of OS
Windows 7
Windows 8
Windows 10
Windows Server 2008 R2
Linux (Kernel version 2.6.38 and above)
OS X (10.8 and above)

You can check it on the Alibaba link:

Hope this will help you.