How do I know what color space I'm working in...?

[Mickeyjuice]

Hey all,

I'm looking at creating a DVD and am just trying to get my head around some basic AviSynth scripts (convertToYUV2()) line got me reading about colorspaces.,..

Is there any way to tell what format my videos are in? RGB or YUV?

I've captured DV AVI via firewire into Premiere Pro, (I think the Panasonic DV codec is installed) and now I'll be frameserving with debugmodeFsvr to CCE via avisynth to create an Mpeg2 for authoring.
If I work with VHS I capture using my Canopus ADVC card, giving the same results eg a DV AVI for editing.

If I know what colorspace my workflow is in, it will help me understand Avisynth / CCE better (hopefully giving best results).

Thanks

[manono]

Hi,

Is there any way to tell what format my videos are in?

Add Info() to the script temporarily (without any colorspace conversions).

http://avisynth.org/mediawiki/Info

[edDV]

Analysis of information provided ...

DV is YCbCr (ITU Rec.601)

Premiere Pro DV project setting - YCbCr (ITU Rec.601) excluding filtering*.

"frameserving with debugmodeFsvr to CCE" - probably an RGB conversion

"create an Mpeg2 for authoring" - conversion back to YCbCr (ITU Rec.601)


* Premiere Pro converts YCbCr to RGB for most filtering/transitions, then converts the resulting tmp files to export format.

[Mickeyjuice]

Thanks for the replies. Very helpful. I'll have a look with AviSynth tonight.

"frameserving with debugmodeFrameserver to CCE" - probably an RGB conversion
.

You can select which format to use with debugmode frameserver:

Can serve video in 3 formats, RGB, ARGB or YUY2 (YUY2 works only if the target application can accept direct YUY2 data, like CCE 2.67. When serving from Adobe Premiere Pro, if the project elements are all in YUV then using YUY2 gives better quality than RGB serving because it saves two colourspace conversions)

[edDV]

Good to know. I'm out of date on debugmode frameserver it seems.