Tool to record streaming video?

Hi jianxin9,
An open source tool well don't know... lets check if your system has what you need.
Your first comment>
I  have been trying CamStudio, but can't seem to get any audio when I record. << maybe I can help on this one to start with.
If you could provide your system specs as we can't see what you have there helps,
some systems bundle with poor audio cards ie half duplex audio cards so the stereo mix maybe missing or it's missing a crucial piece. Without this feature you will not be able record from the speakers.
Open camstudio go to Options and make sure it's ticked to record audio from speakers.
let me know if you have the stereo mix ok.
Look at the master volume open the options tab then put it on recording looks kinda like this, is there a stereo mix?
Put it back to playback and apply.


 

stereo-mix.jpg

thanks for posting!  when i select "record audio from speakers" this error pops up
camstudio.PNG

That's coolio--I appreciate the help!

Your welcome !!
 good luck with it :)