When I capture a video from my VCR (a Sharp VC-M401SM) with an S-Video cable connected to a SCART adaptor (like the one shown in this post) I obtain a gray-scale image.
One possibility for this is that the VCR is not capable to output an S-Video signal. To understand if this was the true reason I compared some couples of images composed by:
- the gray-scale image obtained using the S-Video cable;
- an image obtained by acquiring a colored image from the composite signal and then converted to grayscale.
Here is one example:
It seems to me that there are little differences between the two images. I guess that these differences result from noise and from color to gray-scale conversion. This makes me think that the quality of the images is comparable.
Therefore I conclude that the gray-scale output when using the S-Video cable is not due a problem in the croma component, but instead due to the fact that the VCR does not support the S-Video output.
- Is my reasoning correct? Can we conclude from this test that the VCR does not support S-Video?
- If not, what can we conclude instead?