24p and the HD SDI output - question for uber-spec-geeks at DVinfo.net

Chad Haufschild · December 24th, 2009, 09:07 AM

Happy Christmas, everybody. I'm sitting here in the edit bay at my day job with little to do other than contemplate the tech specs of the HD SDI output of my HD250.

I'm trying to wrap my brain around the output specs - 720p60 or interpolated 1080i. So my question is, does the frame rate setting you choose (24p, 30p, 60p...) in camera affect the HD SDI output in any way or does it just affect how the camera records to HDV?

In other words, if I've set up the camera to record at 720p24 does the HD SDI output the 24p with duplicate frames to achieve the 60p? If that's the case, are those duplicate frames flagged in anyway? And what cadence does it use to achieve 720p60 from 24p?

Have fun and best wishes.

Chad

Craig Yanagi · December 24th, 2009, 04:45 PM

Happy Holidays, Chad.

I hope I understand your questions correctly:

- The frame rate you set in the menu correlates to the output from the HD-SDI. The signal is uncompressed, includes time code and embedded audio.

- When the camera is set to 720p, Varicam flags will also be sent out on the HD-SDI stream, which will enable the NLE to pull in the appropriate frames. This is a unique feature to the JVC ProHD camcorders from the 200 series on.

Hope this information helps. Have a great holiday season!

Craig

Chad Haufschild · December 24th, 2009, 05:28 PM

That's exactly what I was hoping for. Thanks, Craig and Happy Holidays!

December 24th, 2009, 09:07 AM	#1
Chad Haufschild Regular Crew Join Date: Nov 2006 Location: Lincoln, NE Posts: 162	24p and the HD SDI output - question for uber-spec-geeks Happy Christmas, everybody. I'm sitting here in the edit bay at my day job with little to do other than contemplate the tech specs of the HD SDI output of my HD250. I'm trying to wrap my brain around the output specs - 720p60 or interpolated 1080i. So my question is, does the frame rate setting you choose (24p, 30p, 60p...) in camera affect the HD SDI output in any way or does it just affect how the camera records to HDV? In other words, if I've set up the camera to record at 720p24 does the HD SDI output the 24p with duplicate frames to achieve the 60p? If that's the case, are those duplicate frames flagged in anyway? And what cadence does it use to achieve 720p60 from 24p? Have fun and best wishes. Chad

December 24th, 2009, 04:45 PM	#2
Craig Yanagi JVC America Join Date: Jan 2006 Location: Wayne, New Jersey Posts: 198	Happy Holidays, Chad. I hope I understand your questions correctly: - The frame rate you set in the menu correlates to the output from the HD-SDI. The signal is uncompressed, includes time code and embedded audio. - When the camera is set to 720p, Varicam flags will also be sent out on the HD-SDI stream, which will enable the NLE to pull in the appropriate frames. This is a unique feature to the JVC ProHD camcorders from the 200 series on. Hope this information helps. Have a great holiday season! Craig __________________ Craig Yanagi - National Marketing Manager JVC Professional Video Division, JVCKENWOOD USA Corp.

December 24th, 2009, 05:28 PM	#3
Chad Haufschild Regular Crew Join Date: Nov 2006 Location: Lincoln, NE Posts: 162	That's exactly what I was hoping for. Thanks, Craig and Happy Holidays!