Color space advice, please.

[videoFred]

I'm not an expert in colorspace, and need good advice.

Lets begin with my camera: output of this machine vision camera is YUV(4:2:2).
Progressive and uncompressed, as far as I can see.
With the fire wire connection, I capture direct to harddisc.
As a codec for these AVI files, I use Huffyuv.
But how do I configure Huffy to begin with?
Huffy converts to YUY2, right?

Then, I load the Huffyuv files into my Avisynth script.

Here is my filter chain:

1) MVTools MVDenoise: requires YV12
2) Depan: requires YV12
3) MSharpen: works with RGB32, YUY12, YV12
4) Cropping and resizing
5) HDRAGC: requires RGB
6) Save the file again with Huffyuv: back to YUY2 again, right?

So my file is converted 4 times! from the original YUV to YUY2-YV12-RGB then back again to YUY2.

My questions are:

1) My source is 1024 x768, progressive. But at the point I use the HDRAGC filter, there is already a resizing 720x576. Should I use ConvertToRGB32("rec709", false)?

2) At the end of the script, should I use ConvertBackToYUY2 or should I leave this to Huffyuv?

3) How do I configure Huffyuv for capturing and at the end of the script, in my case?
My end target is Mpeg2, for DVD use.

4) Any other suggestions to improve quality?

Fred.

[Wilbert]

Lets begin with my camera: output of this machine vision camera is YUV(4:2:2).
So, that's just YUY2.

1) MVTools MVDenoise: YV12
2) Depan: YV12
3) MSharpen: use YV12
4) Cropping and resizing:
5) HDRAGC: RGB
6) Save the file again with Huffyuv: back to YUY2 again, right?

So that's two conversions here: YUY2->YV12->RGB.

You don't need convert back to huffyuv, just open the script in a mpeg-2 encoder. Of course this results in the conversion RGB->YV12, which i advice you to do in AviSynth.

1) My source is 1024 x768, progressive. But at the point I use the HDRAGC filter, there is already a resizing 720x576. Should I use ConvertToRGB32("rec709", false)?
Nope, just ConvertToRGB32().

[videoFred]

Originally posted by Wilbert
[B]So, that's just YUY2.

Ah! Good news, I did not know this.

So that's two conversions here: YUY2->YV12->RGB.

Yes!

You don't need convert back to huffyuv, just open the script in a mpeg-2 encoder. Of course this results in the conversion RGB->YV12, which i advice you to do in AviSynth.

Yes, but I must import these files first into an NLE program(Magix) to add music etc...
From there I make the Mpeg2.

However, thank you for the fast advice, in our langue: Dank je!;)

Fred.

[Wilbert]

Yes, but I must import these files first into an NLE program(Magix) to add music etc... From there I make the Mpeg2.
If that doesn't open avs scripts, you can try makeAVIS or vfapi (both are avi wrappers / vfapi needs RGB24 though). If those wrappers don't work, you are stuck with huffyuv.