prebuffer and 60p at DVinfo.net

Cees van Kempen · May 3rd, 2012, 12:10 PM

Dan,

I consider to move from my beloved nanoFlash to the Gemini one day. I have a few questions:

Does the Gemini 4:4:4 have a prebuffer option?

When is the planned 60p support scheduled?

Cees

Stewart Chong · May 4th, 2012, 04:37 AM

Even 720 60p will be fine for me as a 3D recorder with a monitor.
Stewart
Founder and Digital Imaging Executive
Home Page
Hong Kong in CHINA

Dan Keaton · May 4th, 2012, 08:47 AM

Dear Cees,

No, the Gemini 4:4:4 does not have a pre-buffer option.

At over 200 Megabytes per second, depending on the frame rate, having enough fast memory for even a few seconds of video is hard to provide without raising the cost of the Gemini 4:4:4.

The Gemini 4:4:4 has lots of internal memory, but not enough for a pre-record buffer, sorry.

1080p23.976, (23.98), 24, 25, 29.97, 30, 50, 59.94, and 60 frames per second, all progressive, all recorded in 4:4:4, (even from 4:2:2 cameras) will be available in our next firmware release.

Our next firmware release, a free upgrade, is currently in final reliablity testing and is due out in two weeks.

This is a free firmware update.

In addition, our ARRIRAW Option will be built into this firmware release, and this is an extra cost option.

To allow those who have an ARRI ALEXA and a Gemini 4:4:4, one can use the ARRIRAW Option in demo mode, and there will be a watermark on the image. This allows one to test the option and their workflow without purhasing the ARRIRAW Option.

Cees van Kempen · May 5th, 2012, 05:17 AM

Dear Dan,

Maybe when the DNxHD upgrade comes availabe?

Cees

Dan Keaton · May 5th, 2012, 05:34 AM

Dear Cees,

Yes, that is completely different.

With a compressed codec like DNxHD, we should be able to implement a pre-record buffer (Record Cache).

Cees van Kempen · May 6th, 2012, 05:26 AM

You should be able, as you say. But will you? I hope so, for wildlife filming prerecord buffer is very valuable.

Dan Keaton · May 6th, 2012, 05:46 AM

Dear Cees,

We have not discussed this internally so I do not want to commit to a Pre-Record Buffer feature at this moment.

However, I feel that this is an important feature, and it is certainly technically possible, so I definitely want to include this in our list of features.

We work as a team, so after we discuss this, I will report back.

May 3rd, 2012, 12:10 PM	#1
Cees van Kempen Major Player Join Date: Jan 2010 Location: Nieuw-Vossemeer, The Netherlands Posts: 455	prebuffer and 60p Dan, I consider to move from my beloved nanoFlash to the Gemini one day. I have a few questions: Does the Gemini 4:4:4 have a prebuffer option? When is the planned 60p support scheduled? Cees

May 4th, 2012, 04:37 AM	#2
Stewart Chong Regular Crew Join Date: Dec 2008 Location: Hong Kong - CHINA Posts: 28	Re: prebuffer and 60p Even 720 60p will be fine for me as a 3D recorder with a monitor. Stewart Founder and Digital Imaging Executive Home Page Hong Kong in CHINA

May 4th, 2012, 08:47 AM	#3
Dan Keaton Inner Circle Join Date: Dec 2002 Location: Augusta Georgia Posts: 5,421	Re: prebuffer and 60p Dear Cees, No, the Gemini 4:4:4 does not have a pre-buffer option. At over 200 Megabytes per second, depending on the frame rate, having enough fast memory for even a few seconds of video is hard to provide without raising the cost of the Gemini 4:4:4. The Gemini 4:4:4 has lots of internal memory, but not enough for a pre-record buffer, sorry. 1080p23.976, (23.98), 24, 25, 29.97, 30, 50, 59.94, and 60 frames per second, all progressive, all recorded in 4:4:4, (even from 4:2:2 cameras) will be available in our next firmware release. Our next firmware release, a free upgrade, is currently in final reliablity testing and is due out in two weeks. This is a free firmware update. In addition, our ARRIRAW Option will be built into this firmware release, and this is an extra cost option. To allow those who have an ARRI ALEXA and a Gemini 4:4:4, one can use the ARRIRAW Option in demo mode, and there will be a watermark on the image. This allows one to test the option and their workflow without purhasing the ARRIRAW Option. __________________ Dan Keaton Augusta Georgia

May 5th, 2012, 05:17 AM	#4
Cees van Kempen Major Player Join Date: Jan 2010 Location: Nieuw-Vossemeer, The Netherlands Posts: 455	Re: prebuffer and 60p Dear Dan, Maybe when the DNxHD upgrade comes availabe? Cees

May 5th, 2012, 05:34 AM	#5
Dan Keaton Inner Circle Join Date: Dec 2002 Location: Augusta Georgia Posts: 5,421	Re: prebuffer and 60p Dear Cees, Yes, that is completely different. With a compressed codec like DNxHD, we should be able to implement a pre-record buffer (Record Cache). __________________ Dan Keaton Augusta Georgia

May 6th, 2012, 05:26 AM	#6
Cees van Kempen Major Player Join Date: Jan 2010 Location: Nieuw-Vossemeer, The Netherlands Posts: 455	Re: prebuffer and 60p You should be able, as you say. But will you? I hope so, for wildlife filming prerecord buffer is very valuable.

May 6th, 2012, 05:46 AM	#7
Dan Keaton Inner Circle Join Date: Dec 2002 Location: Augusta Georgia Posts: 5,421	Re: prebuffer and 60p Dear Cees, We have not discussed this internally so I do not want to commit to a Pre-Record Buffer feature at this moment. However, I feel that this is an important feature, and it is certainly technically possible, so I definitely want to include this in our list of features. We work as a team, so after we discuss this, I will report back. __________________ Dan Keaton Augusta Georgia

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