Need advice on format for greenscreen at DVinfo.net

Tim Veal · January 21st, 2010, 07:03 PM

I will be doing so greenscreen shooting this weekend with a HV20. Final delivery will be a mix of web and Blu-ray, both 24p. Would it be better to shoot HDV 24p or shoot Mpeg I frame 4:2:2, 60i via HDMI into the MXO Mini? If I shot using the MXO Mini I would have to use HDLink to deinterlace and change the framerate to 24p. Would there still be an advantage to using the 4:2:2 codec?

Leo Baker · January 21st, 2010, 07:13 PM

Also 422 gives you mroe colour space to work with so better keying quality with the image and end results.

Leo Baker · January 21st, 2010, 07:14 PM

Hello,

Direct HDMI capture while you are recodring the Green screen will give you the best quality going into the Matrox unit into Cineform as it will be uncompressed, before the tape/camera compression if you recorded onto Tape. You will get better keying results and shaprer dges when usingthe above as opposed to the tape/camera compression.

Leo

Stephen Armour · January 21st, 2010, 11:08 PM

Go the direct capture route before it goes to tape. You'll thank yourself if you do! That compression is nasty for chroma work!

Tim Veal · January 22nd, 2010, 11:24 AM

Thanks. I'll go direct to the matrox box and convert to 24p/deinterlace afterwards. I will also get better audio as the MXO Mini will give me a wav file instead of mpeg audio.

January 21st, 2010, 07:03 PM	#1
Tim Veal Regular Crew Join Date: Apr 2007 Location: Chicago, IL Posts: 70	Need advice on format for greenscreen I will be doing so greenscreen shooting this weekend with a HV20. Final delivery will be a mix of web and Blu-ray, both 24p. Would it be better to shoot HDV 24p or shoot Mpeg I frame 4:2:2, 60i via HDMI into the MXO Mini? If I shot using the MXO Mini I would have to use HDLink to deinterlace and change the framerate to 24p. Would there still be an advantage to using the 4:2:2 codec?

January 21st, 2010, 11:08 PM	#4
Stephen Armour Major Player Join Date: Dec 2005 Location: Natal, RN, Brasil Posts: 900	Go the direct capture route before it goes to tape. You'll thank yourself if you do! That compression is nasty for chroma work! __________________ http://lightinaction.org "All in the view of the LION"

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January 21st, 2010, 07:13 PM	#2
Leo Baker Regular Crew Join Date: May 2009 Location: London Posts: 147	Also 422 gives you mroe colour space to work with so better keying quality with the image and end results.

January 21st, 2010, 07:14 PM	#3
Leo Baker Regular Crew Join Date: May 2009 Location: London Posts: 147	Hello, Direct HDMI capture while you are recodring the Green screen will give you the best quality going into the Matrox unit into Cineform as it will be uncompressed, before the tape/camera compression if you recorded onto Tape. You will get better keying results and shaprer dges when usingthe above as opposed to the tape/camera compression. Leo

January 22nd, 2010, 11:24 AM	#5
Tim Veal Regular Crew Join Date: Apr 2007 Location: Chicago, IL Posts: 70	Thanks. I'll go direct to the matrox box and convert to 24p/deinterlace afterwards. I will also get better audio as the MXO Mini will give me a wav file instead of mpeg audio.