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Suggestions for Dual Link Recorder


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#1 rob spence

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Posted 30 September 2016 - 11:22 AM

I need to do some full res slo-mo on my Sony F3. Can anyone recommend a dual link recorder to do this? TIA


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#2 Tyler Purcell

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Posted 30 September 2016 - 11:36 AM

Well, the camera is a 1080p camera, so the capturing format is the same "resolution" as the camera head.

I believe you're referring to color space and bit depth. Yes, the F3 does have HDSDI output for 444 capture, but the camera itself is 10 bit 422. It's one of the big "whoops" moments when designing that camera. So all you need is a single HDSDI or even HDMI output to give you the 1.5G HDSDI 10 bit 4:2:2 signal for capturing.

The F3 also doesn't do slow-mo on the HDSDI output. Slow-mo is done internally through the MPEG capture only. So the HDSDI output is limited to 30fps in 1080p mode and 60fps in 720p mode.

Atomos Ninja 2 is $295 and captures HDMI output. However, I believe the HDMI output of the F3 is 8 bit 4:2:0, but not 100% on that. If it's 10 bit 4:2:2, that's a great option. To capture the HDSDI output, the Samurai Blade $495, should work fine, as long as the single port 1.5G HDSDI does it's job properly.
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#3 rob spence

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Posted 30 September 2016 - 12:33 PM

Hi Tyler,

Thanks for the response. I have the blade  (HDSDI) for 1080p 422 capture and that works fine...but I heard that you could capture 1080p at 60fps externally through using a dual link recorder. (rather than 720p). Not so then.


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#4 Mark Kenfield

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Posted 01 October 2016 - 12:11 AM

Yep. You can absolutely do 1080p50/60 over a single 3G-SDI (if you have the 4:4:4 upgrade), or via dual-link if you don't.

You just have to have your SDI outputs setup accordingly, and then select 1080 50i/60i as your internal recording format (this will enable a progressive 50/60p feed out of the A and B SDI ports.

Works a treat with the Odyssey7Q.
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#5 rob spence

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Posted 01 October 2016 - 04:37 AM

Thanks for the info Mark....it adds another string to the bow. I'll have to rent an Odyssey for the project...talking of the 444 upgrade do you know if it allows you to use a viewing LUT when using s-log and, if so, does that need to use dual link?


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#6 Phil Rhodes

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Posted 01 October 2016 - 04:54 AM

Are you sure there's anything particularly different about the 3G? If it isn't some Sony proprietary thing, it can probably be recorded on something cheaper than an Odyssey.


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#7 rob spence

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Posted 01 October 2016 - 06:15 AM

Can you expand on that Phil.


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#8 Mark Kenfield

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Posted 01 October 2016 - 06:58 AM

Rob, I believe the 4:4:4 upgrade does open up some kind of LUT option on the camera, but I've never touched it myself.

One of my favourite features of the Odyssey is specifically its LUT capabilities. I've paired my F3 with both the Odyssey and the Gratical Eye for that reason - I get full LUT and monitoring capabilities on both my EVF and the onboard monitor. The combination really does bring the camera into the 21st century.
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#9 rob spence

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Posted 01 October 2016 - 07:09 AM

Hi Mark, I use the Samurai blade at the moment...which has the upgrade so you get s-log 2 and 3 viewing capabilities ... but not S-log itself (unfortunately). I use this as an evf and have adapted a SmallHD loupe to fit it. It works well for HD...but the viewing for Slog is a bit of an issue...plus the slo-mo, of course. Your combo sounds a very useful solution. What I'd really like though is a 5inch version of the Odyssey so I can use it as an evf too , like I use my Blade...is thee such a thing?


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#10 Phil Rhodes

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Posted 01 October 2016 - 07:23 AM

Rob, the issue is how the F3 outputs its high frame rate stuff. Some cameras use their SDI ports to output proprietary data formats that need specific support from the recorder.

 

Googling around, it seems that you can get conventional, standard 60p 4:2:2 out of the 3-gigabit SDI if it's had the 4:4:4 upgrade. This ought to be recordable on almost any modern recorder, although it's not something I've ever done with an F3 and you should test before relying on this information. If you're anywhere near at any point, I have a Shogun you could try it on.

 

P


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#11 rob spence

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Posted 01 October 2016 - 07:33 AM

Thanks Phil that's a kind offer. Unfortunately I think it boils down to A. Getting a 444 upgrade....or B. an Odessey (type) dual-link recorder. Both options involve more cash!


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#12 Tyler Purcell

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Posted 01 October 2016 - 12:40 PM

Again, according to Sony, the 1.5G standard HDSDI port can only do 30p. They don't mention the upgrade on their documentation.
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#13 Phil Rhodes

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Posted 01 October 2016 - 01:39 PM

You may find it's possible, in an absolute emergency, to record the two links independently and then recombine them in post.

 

P


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#14 Mark Kenfield

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Posted 02 October 2016 - 01:49 AM

Without the 4:4:4 upgrade, you just set the camera to 50i/60i and the Odyssey can take a dual link feed from the A and B ports to give you proper 1080 50p/60p.

The most complex part of it is really just wading your way through the F3's menus to change the recording format.
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