On Mon, Feb 8, 2010 at 2:22 PM, Novák Levente <[email protected]> wrote: > 2010. 02. 7, vasárnap keltezéssel 17.40-kor Eric Wescott ezt írta: > >> >> However, if an svideo cable is plugged in then tuning to composite >> produces the svideo signal in black and white rather than composite. >> While this isn't a HUGE problem it would be nice to be able to have >> three sources plugged in and tune to whatever I want. >> > > Very often S-video and Composite are wired together (S-video carries > luma and chroma on two different wires while Composite has the two > mixed; the luminance wire of S-video is often soldered to Composite, > that's why you see S-video's luminance signal on Composite). > > It is better in this case to pull out one of the two cables, since they > could interfere with each other if both are plugged (I observed the same > behaviour on my TV set).=20
Levente is correct in this regard. It is very common for the s-video luma signal to be the same physical connection as the CVBS input. The rationale I've heard is there isn't much value in separating out the two video inputs given that you would still need separate audio inputs. But yes, you should not have both connected at the same time, since even if both are delivering the same signal you can have interferences effects (such as ghosting). Devin -- Devin J. Heitmueller - Kernel Labs http://www.kernellabs.com _______________________________________________ ivtv-users mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-users
