-
Sony videocameras and RGB standards.
Hello! I do not understand several things.
First is how Sony consumer camera x.v.Color and non-x.v.Color settings correspond to Sony Vegas Studio RGB and Computer RGB standards?
And the second is what should be my workflow in Sony Vegas if I record vodeo in x.v.Color (High Definition 29 Mbit/s) and produce DVD disks – should I use filter “from Studio RGB to Computer RGB” or voce versa?
Thank you!
Antony, wedding and kids videography
видеосъемка свадеб и видеосъемка детей -
1 Reply
-
[Anton Malahit] “First is how Sony consumer camera x.v.Color and non-x.v.Color settings correspond to Sony Vegas Studio RGB and Computer RGB standards?”
Computer RGB is the color range from 0-255. Studio RGB is the color range from 16-235. x.v.Color is xvYCC or Extended-gamut YCC that has nothing to do with RGB (other than they are both ways to represent color) If you were to compare them, Computer RGB is a wider range then x.v.Color, which is a wider range than Studio RGB.
The level preset for Computer RGB to Studio RGB is designed to take media hat was generated on a computer or still image camera (Computer RGB) and modify it to match video taken with a video camera (Studio RGB). Since x.v.Color uses a wider gamut than Studio RGB you might be tempted to use it on x.v.Color as well but it will probably over compensate. I would treat x.v.Color footage the same as all other footage and color correct it properly.
[Anton Malahit] “And the second is what should be my workflow in Sony Vegas if I record vodeo in x.v.Color (High Definition 29 Mbit/s) and produce DVD disks – should I use filter “from Studio RGB to Computer RGB” or voce versa?”
There is nothing different to do there than what you should already be doing. All cameras shoot outside the Studio RGB range and need to be corrected. Simply throwing Computer RGB to Studio RGB on everything isn’t the best solution. You should be using Levels, Color Corrector, and Color Curves, to correct all of your footage as appropriate for the footage contents.
Your workflow should be to place Levels -> Color Corrector -> Color Curves on your footage in that order. This can be done at the Track level if all footage from a single camera is on a the track. Otherwise add it to the media from the camera as a Media FX. Then open your Video Scopes and use the Waveform monitor to adjust the levels so that your luminance falls within the 0 to 100 range. You can start with the Computer RGB to Studio RGB preset but you may find that it limits too much and you need to add more range back. The image will look a bit washed out at this point so you want to move to the Color Curves plug-in and add a slight “S” curve to bring the dynamic range back. Finally you might want to move to the Color Corrector and boost the Saturation just a bit. Use the Vectorscope on your Video Scopes to make sure that you don’t booth the color too much. You should do this for all footage; not just x.v.Color.
With regard to producing DVD’s, if you do nothing, everything will work fine because the MPEG2 encoder for DVD’s will clip the footage to Studio RGB anyway. You just won’t have any control over it but Vegas will not allow you to produce a DVD that has illegal colors so one workflow for DVD is to “do nothing”.
BTW, if you are using x.v.Color footage, you might want to change your projects Pixel Format to 32-bit floating point (video levels) to preserve the color of your x.v.Color footage better. That is one of the intended uses of this setting.
~jr
http://www.johnrofrano.com
http://www.vasst.com
Reply to this Discussion! Login or Sign Up