Which format should I capture in?

[sidders]

After upgrading my system, I am now able to use Huffyuv to capture. I am mostly taking captures from Sky Digital Box through a composite lead.
The actual output of the Sky Box is RGB. Should I capture in RGB or does it not make a difference? I want to retain the original picture as much as possible.
Or should I capture in YUYV?
I'm not really sure of the settings to use for the best. I am then encoding the file as an MPEG2 to put on DVD.
At the moment, I'm using RGB24, predict median, and applying a DeInterlace filter on the fly whilst capturing in VirtualDub, as most of the channels seem to output at interlaced signal.

Thanks for reading.
Any help appreciated!

[bb]

I guess the original video stream is YV12, which may be converted to RGB by your Sky Digital Box. But the RGB information is lost if you capture through your analogue composite connector. The settings of your capture card decide which color space you'll get, regardless of the original source. So you can choose whatever color space you like, provided that your card supports it. I'd rather choose something appropriate for the final encoding, YV12 if possible for encoding to MPEG-2. Using Avisynth 2.5 you can keep the color space in your filter chain (unless you use filters that aren't YV12 compatible).

I wonder why you're asking for the best possible quality regarding the color space while telling at the same time that you are going to deinterlace on-the-fly. For best quality you should probably deinterlace afterwards using a high-quality deinterlacing method.

bb

[sidders]

Thanks for the quick reply. Should I deinterlace after using avisynth or virtualdub?
Thanks.

[bb]

You should deinterlace in Avisynth, e.g. using the Decomb package, Telecide() or FieldDeinterlace() for "real interlaced" sources, right after the AviSource or DirectShowSource command. I suggest you read up about deinterlacing; there's much to learn about this topic, and the forums provide lots of information about it.

bb

[sidders]

will do.
Thanks mate