First of all I dont know where this thread should be so if an admin/mod want to move it you welcome =)
I bought an usb video&audio grabber similar to the one on the picture but my problem is that the yellow connector, which is suppose to be the video input female, composite(RCA) doesnt fit my VHS output male.
P.S.: The grabber should already have a S-Video jack, so I guess you mean an old-fashioned 5-pin 180° DIN connector. It don't remember the pinout, I think you have to connect only composite video and ground. If you own some antique equipment, don't you have an adapter cable for it?
sometimes there is slight difference in the sizes but if you push and rotate it it should fit.
Doe the center pin fit at all in the female plug or you have a problem with the diameter?
There are no RCA plugs with slightly different dimensions. Either the plug is broken or it's a completely different connctor type. In bot cases, you may want to solder a new plug to the cable.
We can't help any further, you say that they are a female RCA and a male RCA but they dont fit each other, I have seen some cases that the male fits very tight in the female and it needs some force but I have no idea if there is some other problem in yout case.
Am I even connecting the correct female RCA to the correct video output?
The yellow (it says video on it) to the lower output on the video. (there is only two).
Did you notice the text "SORTIE ANTENNE" and "RF.OUT". This in fact clarifies, why the connector doesn't match. It's a modulated RF output. The video output has to be interfaced on the Scart connector beneath, using an adaptor.
Yes the plugs are not RCA and the signal is not a composite output either.
You have to use an adapter like this to get the composite signal from the scart
You will also need male to male cables because both your usb cable RCA and this adapter RCA have female plugs or maybe you can find a different adapter that outputs male RCA