VDMX to an Atomos Ninja recorder sync issues

#1

Has anyone had experience with recording to a Atomos Ninja recorder from VDMX? Have you experienced sync issues and were you able to resolve them?

The Ninja recorder freezes up, loses input and stops recording.

I am recording with a Ninja 2 from my Macbook Pro (Retina, 15-inch, Mid 2015) 2.8 GHz Intel Core i7 running MacOS Mojave 10.14.6. I am using VDMX 5 to send video to the Ninja via HDMI at 1080p 30hz. I have tried a few different HDMI cables and the same thing happens when I am at 1080i 60hz.

One thing that worked somewhat is saving the clips at the same frame rate (30fps). Previously, my clips were different frame rates 30. 29.97, 15, etc. Making all of the clips the same frame rate did help the situation a great deal, but it still happens, but less frequently.

I am using a guitar to trigger clips with MIDI and it works fine when I am playing slowly, but once I start playing faster (many notes in a quick sequence or strumming) and there are many clips changing quickly, the Ninja freezes up again, loses input, and stops recording, but will start recording again after a few seconds.

Please let me know if you have any insight or suggestions to help this situation.

Thanks.

Jeremy

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#2

Hi Jeremy,
I don’t have a Ninja recorder, but I’ve had loads of issues with external recorders and HDCP. To my knowledge, the Atomos and BlackMagic design devices will not record HDCP content, which sometimes the mac throws out. To test this theory, you’d have to break the HDCP signal. Some people use VGA to break it, or I use external recorders that avoid HDCP all together. Another reason these pro recorders stop recording is the capture media is not fast enough to handle the capture. I’m not sure which model you own (I think there are 5 versions of the Ninja recorder at this point), but someone from Atomos can tell you which media is required for solid capture performance.

Let me know if any of this helps.

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#3

Thanks. What external recorders do you use?

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#4

I use H.264 or H.265 recorders. Similar to the Cloner Alliance devices sold on Amazon. I get them directly from the manufacturer in China. I’m waiting for a 4K30 capture device to arrive in the next week or two. If it passes the test, I might import a couple to resell.

They import them! And put their brand on it, but they are usually available on Amazon (the 4K model is out of stock). Lmk if you have any specific questions about them: https://www.cloner-alliance.com/cloneralliance-products-comparison/

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#5

Thanks for the info!

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#6

I’m assuming you are outputting via the MacPro’s built in HDMI (or a Thunderbolt to HDMI adaptor)?

You could try using an output device like the Blackmagic UltraStudio. This device outputs a standard broadcast spec signal which it what the Atomos recorders are expecting.

I use an UltraStudio Mini Monitor to output to my SmallHD monitor.

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#7

Yes, that is what I am using. @admrobrts Thanks for the info about the Blackmagic UltraStudio.

@ProjectileObjects you wrote in your article about and HDMI splitter cleaning up the signal to strip the HDCP. I ordered this splitter: https://www.amazon.com/gp/product/B0732MD43P/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
Will this do the job? It was cheap, but requires power.

This one would be easier. USB powered, but it is more expensive. https://www.amazon.com/gp/product/B07S5LXHPR/ref=ox_sc_saved_title_2?smid=ATVPDKIKX0DER&psc=1

I am seriously considering the Cloner Alliance 4K recorder.
https://www.cloner-alliance.com/cloneralliance-uhd-pro/
Have you tested it? Would you recommend it?

One question about it. Does it record only your desktop or will it also record the output of the Full Screen Display 1 (i.e. the video that you are sending from VDMX to the projector)?

Also, what is the best storage external storage for it? It is a USB Flash Drive, correct? It is difficult to find 1T and 2T Flash Drives.

Thanks.

Jeremy

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#8

@ProjectileObjects you wrote in your article about and HDMI splitter cleaning up the signal to strip the HDCP. I ordered this splitter: https://www.amazon.com/gp/product/B0732MD43P/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
Will this do the job? It was cheap, but requires power.

One of the splitters I have breaks the HDCP. Two of them don’t. I can’t say for sure because they are getting made by different manufacturers all the time. The only way to find out is to get one, plug it in, and try to pipe out HDCP content (Netflix, HBO, some blu-ray devices, etc.) Depending on the HDMI cables you use and how long they are, you may not need additional power. The one I have uses a Micro USB cable to pull in 5V 2A for the splitter. I use a cheap raspberry pi (5V 2A) AC/DC micro usb power supply for longer runs (50’ HDMI to splitter to 2x 50’ HDMI to projectors).

This one would be easier. USB powered, but it is more expensive. https://www.amazon.com/gp/product/B07S5LXHPR/ref=ox_sc_saved_title_2?smid=ATVPDKIKX0DER&psc=1

Well, that one goes out through DisplayPort, so there’s a good chance it would send HDCP out to both HDMI ports.

I am seriously considering the Cloner Alliance 4K recorder.
https://www.cloner-alliance.com/cloneralliance-uhd-pro/
Have you tested it? Would you recommend it?

They’ve been sold out for a while, but I’m waiting on a delivery of the same exact device from their supplier (in China and at half the price). If it’s good. I’ll post a link to the manufacturer or import a few. I have the 1080p versions and they work great. The H.264 compression keeps the media sizes small and removes the need for fast capture cards like (SSDs, CFast, etc.). A simple USB 2.0 thumb drives can capture hours of footage. I recently used it to capture this: https://vimeo.com/516766978

One question about it. Does it record only your desktop or will it also record the output of the Full Screen Display 1 (i.e. the video that you are sending from VDMX to the projector)?

The device has an HDMI in and Out. It will capture whatever you send into it.

Also, what is the best storage external storage for it? It is a USB Flash Drive, correct? It is difficult to find 1T and 2T Flash Drives.

I’d say faster is better, but I’ve no problems capturing with a $20 thumb drive like this: https://www.amazon.com/Samsung-MUF-128AB-AM-Plus-128GB/dp/B07D7PDLXC/ref=sr_1_3?dchild=1&keywords=128gb+samsung+thumb+drive+short&qid=1614978297&sr=8-3

:slight_smile:

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#9

The ClonerAlliance UHD 4K is back in stock. https://www.cloner-alliance.com/cloneralliance-uhd-pro/
I just ordered one. I am excited to check it out. It seems like a really simple way to record sets.

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#10

Cool, let me know how it goes. I like the 1080p recorders, but have yet to test the 4K version.

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#11

@parenthesisme

I got my 4Kp30 recorder today. It works great for my needs. I wish I could record 4Kp60, but that would require a more expensive capture card. (i.e. Magewell 4K for $300+) and I picked up this recorder fro $120. (It’s identical to the ClonerAlliance UHD 4K, just doesn’t have their brand name on it.

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#12

That’s great. I am still waiting for my ClonerAlliance Recorder.

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#13

I’d be very happy to find out where to order one Cornelius if you’re OK with sharing it?

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#14

Sure, you can order a sample from here for about $135 shipped: https://crehivi.en.alibaba.com/product/62462679001-810257562/True_4K_HD_Video_Capture_Stand_alone_recorder_hdmi_video_capture_h265_HDMI_video_capture_4K_30FPS.html?spm=a2700.icbuShop.prsea43447.222.6aac76d5vzW1kF

This version doesn’t have a remote, but I prefer that (one less thing to lose).

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#15

Thanks so much Cornelius! I’m not bothered by the remote either.

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