Question about video preview numbers at DVinfo.net

Derek Grimes · December 30th, 2008, 07:33 PM

On the display in the video preview it reads: 655x480x32
What does the 32 mean?

Thanks

Perrone Ford · December 30th, 2008, 07:40 PM

32 is RGB with Alpha Channel. Essentially its 4:4:4:4 with the final channel being an alpha channel. Do you have an uncompressed file on the timeline?

Derek Grimes · December 30th, 2008, 08:00 PM

That is just what comes up on all my default when I start a new project. I really do not know anything about what you are referring to with the RGB alpha channel.

It seems the more I learn about video the more I realize I do not know.

Perrone Ford · December 30th, 2008, 08:23 PM

Oh, don't worry about it then. It's nothing that will affect your projects for now.

Shaun Roemich · December 30th, 2008, 08:45 PM

Alpha is the transparency channel. The "extra" 8 bits per pixel are used to indicate how much of it are seen "over" the underlying pixel.

December 30th, 2008, 07:33 PM	#1
Derek Grimes Regular Crew Join Date: Feb 2005 Location: nashville, TN Posts: 107	Question about video preview numbers On the display in the video preview it reads: 655x480x32 What does the 32 mean? Thanks __________________ tayproductions

December 30th, 2008, 07:40 PM	#2
Perrone Ford Inner Circle Join Date: Nov 2006 Location: Tallahassee, FL Posts: 4,100	32 is RGB with Alpha Channel. Essentially its 4:4:4:4 with the final channel being an alpha channel. Do you have an uncompressed file on the timeline? __________________ DVX100, PMW-EX1, Canon 550D, FigRig, Dell Octocore, Avid MC4/5, MB Looks, RedCineX, Matrox MX02 mini, GTech RAID, Edirol R-4, Senn. G2 Evo, Countryman, Moles and Lowels.

December 30th, 2008, 08:00 PM	#3
Derek Grimes Regular Crew Join Date: Feb 2005 Location: nashville, TN Posts: 107	That is just what comes up on all my default when I start a new project. I really do not know anything about what you are referring to with the RGB alpha channel. It seems the more I learn about video the more I realize I do not know. __________________ tayproductions

December 30th, 2008, 08:23 PM	#4
Perrone Ford Inner Circle Join Date: Nov 2006 Location: Tallahassee, FL Posts: 4,100	Oh, don't worry about it then. It's nothing that will affect your projects for now. __________________ DVX100, PMW-EX1, Canon 550D, FigRig, Dell Octocore, Avid MC4/5, MB Looks, RedCineX, Matrox MX02 mini, GTech RAID, Edirol R-4, Senn. G2 Evo, Countryman, Moles and Lowels.

December 30th, 2008, 08:45 PM	#5
Shaun Roemich Inner Circle Join Date: Sep 2002 Location: Vancouver, British Columbia (formerly Winnipeg, Manitoba) Canada Posts: 4,088	Alpha is the transparency channel. The "extra" 8 bits per pixel are used to indicate how much of it are seen "over" the underlying pixel. __________________ Shaun C. Roemich Road Dog Media - Vancouver, BC - Videographer - Webcaster www.roaddogmedia.ca Blog: http://roaddogmedia.wordpress.com/