Why is RedCine-X Pro not using the DeckLink to output the signal?

[Luis Otero]

By reading and posting in other thread, I was compelled to open this new thread. The issue is, basically, why all other software that use the Rocket to perform the debayering (such as Resolve) can funnel the signal via the DecLink, and RedCine-X Pro needs to use the Rocket outputs? In my case, my monitor has two HD-SDI inputs, so I do not have to be connecting/disconnecting cables.

So, my question or request to BMD and/or Red is: can the Rocket signal from RedCine-X Pro be funneled, somehow, through the DeckLink so a single output can be used? Again, if a hosting program like Resolve, which uses the Rocket for the debayering, how is this signal sent, and previewed in real-time, via the DecLink, but not for RedCine-X Pro? I mean, this cannot be happening by pure black magic.... Can someone from Red explain the reason in basic English? I do not recall seeing any previous discussion and explanation about this particularity before.

Thanks,

 

[Matt Ryan]

By reading and posting in other thread, I was compelled to open this new thread. The issue is, basically, why all other software that use the Rocket to perform the debayering (such as Resolve) can funnel the signal via the DecLink, and RedCine-X Pro needs to use the Rocket outputs? In my case, my monitor has two HD-SDI inputs, so I do not have to be connecting/disconnecting cables.

So, my question or request to BMD and/or Red is: can the Rocket signal from RedCine-X Pro be funneled, somehow, through the DeckLink so a single output can be used? Again, if a hosting program like Resolve, which uses the Rocket for the debayering, how is this signal sent, and previewed in real-time, via the DecLink, but not for RedCine-X Pro? I mean, this cannot be happening by pure black magic.... Can someone from Red explain the reason in basic English? I do not recall seeing any previous discussion and explanation about this particularity before.

Thanks,

In Resolve, the Rocket is only used for rendering output along with the CPU. Your GPU is used for playback and grading and does not use the Rocket.

 

[Luis Otero]

In Resolve, the Rocket is only used for rendering output along with the CPU. Your GPU is used for playback and grading and does not use the Rocket.

Yes, that is understood. The question is if the signal can be routed, as Premiere Pro, Final Cut, After Effect, etc. do, via the DeckLink. They just need to manipulate their signal path, build a simple, effective GUI to select what is the signal path for monitoring desired, and the image shows via the DeckLink. I do not see this anyway different: RedRocker debayers, RedCine-X, as it has today, provides a GUI where the signal path is selected (HD-SDI or DVI), and we can see it projected. The only modification would be to add DeckLink to the list of signal paths, along with the built-in HD-SDI or DVI.

 

[Matt Ryan]

Yes, that is understood. The question is if the signal can be routed, as Premiere Pro, Final Cut, After Effect, etc. do, via the DeckLink. They just need to manipulate their signal path, build a simple, effective GUI to select what is the signal path for monitoring desired, and the image shows via the DeckLink. I do not see this anyway different: RedRocker debayers, RedCine-X, as it has today, provides a GUI where the signal path is selected (HD-SDI or DVI), and we can see it projected. The only modification would be to add DeckLink to the list of signal paths, along with the built-in HD-SDI or DVI.

i see what you mean now. Yes you are correct, seems like RED could do this in a simple update. It doesnt seem like it would be that difficult to make it happen.

 

[Luis Otero]

Of course, we have not talk about other possible reasons, such as "territory protection", and other business rationales that will justify future business developments and paths. I am almost certain that it is possible NOW to do such signal re-routing.

But might have not happened since it could create a habit and complacency of watching images in 2K, or the opposite, which is a lack of desire to watch images in Quad-HD. Let's not forget about the Break-out box, RedRay, 4K RedLaser Projector, and who knows what else... I mean, this is just thinking outloud.

 

[Matt Ryan]

it would be cool if you could output the full res 4k from the Rocket in redcine-x pro through the blackmagic decklink 4k card. (That is once 4k displays or projects are in a decent price range.)

When Blackmagic released that card I thought maybe RED influenced them in doing it for a specific reason, I guess not.

 

[Luis Otero]

it would be cool if you could output the full res 4k from the Rocket in redcine-x pro through the blackmagic decklink 4k card. (That is once 4k displays or projects are in a decent price range.)

When Blackmagic released that card I thought maybe RED influenced them in doing it for a specific reason, I guess not.

Well, that will also be possible now, I think, since the DeckLink has dual HD-SDI, as the Rocket does.

 

[Craig Parkes]

Obviously there are complications I imagine making this happen from the card's output from REDCINE-X PRO. The card debayers, then sends video signals straight out, or renders out to files, and updates the GPU. I imagine what's coming off the cards HD-SDI is significantly different from what you see on your computer display (as in it probably has embedded timecode, and all manner of other video related data, where as the data getting sent back to update the GUI from the card is different again. I imagine his is done in hardware and the cards design doesn't make it intrinsically easy to feedback to a second output card from with REDCINE-X PRO otherwise they would have done it already.)

In the meantime, why don't you spend not all that much money and make yourself a patch panel to swap your connections around. It would be a pretty basic patch to set up compared to moving around cables everytime.

 

[Luis Otero]

Craig,

As I stated before, my monitor has two HD-SDI inputs, so I just use a finger to select between Input 1 or 2. However, not everyone has such benefit.

 

[jake blackstone]

Well, that will also be possible now, I think, since the DeckLink has dual HD-SDI, as the Rocket does.

Technically, Decklink doesn't have dual SDI outputs. It's 4:2:2 and 0:2:2 outputs for 4:4:4 derived output.

 

[Luis Otero]

Technically, Decklink doesn't have dual SDI outputs. It's 4:2:2 and 0:2:2 outputs for 4:4:4 derived output.

This is a technically intriguing subject for me that I will need to pursue to understand better...

Jake, would Resolve's option to monitor the images in the XYZ colorspace by using both HD-SDI would have something do do with this?

 

[Luis Otero]

Technically, Decklink doesn't have dual SDI outputs. It's 4:2:2 and 0:2:2 outputs for 4:4:4 derived output.

Jake,

So, based on your statement, the option under System Preferences for the DeckLink 3D+ to "Use 3Gb/s Single link SDI not Dual Link SDI output" is only providing monitoring in 4:2:2 if one output is used, right?

Then, to get full 4:4:4 video output, which is also a function available as a selection under System Preferences, then we need to use BOTH HD-SDI output, and we also need to have a monitor that has two HS-SDI that both can be enabled to display both signals to assure a true 4:4:4 monitoring.

So, if I am following you correctly, I can do it with my JVC monitor, but not not with my projector, which uses a HDLink 3D+ to convert a single HD-SDI input to HDMI. This is very interesting, and not quite clear under BMD current literature.