question : mixing camera output and audio from video file

[binooetomo]

Dear All ..

Days ago my 8 years daughter found a video clip of a local girls-band, and she start to dance while watching that video.

Now I want to record this, using my USB cam for the video source.

So, kindly please give me your enlightment to do this , since I will need to live mix 2 source:
1. The camera output
2. Audio (Just the Audio part) from that video file.

Note :
a. she need to watch the video while dancing
b. I only have one PC
c. the video (of that girls-band) is in FLV format


Sincerely
-bino-

[Rémi Denis-Courmont]

That's not possible. The two source have incoherent time stamps.