Blackmagic Forum

Hello, week ago I bought BM assist 12G 5”,I have SSD T7 Samsung but it cannot start recording.
It starts and stops, red (!) is blinking. Does someone knows what is the reason for that ? The firmware is 3.1

Yes, you are dropping frames. What is,your camera and what resolutions and frame rate Aare you trying to record at? Is your drive on the BMD approved list?
Cheers

My camera is sony A7rIII I trying recording full HD but again stop recording:(
With SD cards no problem working correctly!

That is 4K/UHD 2160p showing on the display, HD is 1080p. Your Samsung T7 dive isn’t not on the BMD list of recommended/tested drives. The only Samsung Portable SSD on the list is the T5, 1TB drive.
See BMD Support: https://www.blackmagicdesign.com/support/faq/59028.

So the drive you have is unable to record fast enough to keep up with video signal from the VA, and is dropping frames, which gives you the blinking light. You also have the VA set to stop recording when it detects dropped frames.
Cheers

This is ridiculous, T7 is inheritor of T5, and the speed is too times faster! How it's possible T5 not to have a problem with the recording, and T7 not supporting it?!

OK, now your signal is HD/1080p59.94, which is still going to require a faster write speed card than 1080p29.94, as the faster the frame rate, the higher the bandwidth.

Samsung T7 and T5 are entirely different SD cards. Video uses continuous write speeds, not packet write speeds used by computers, so not all cards are created equal. SanDisk had this same issue with the UHS1 Extreme Pro cards, when updated, no longer worked in BMD cameras.
Cheers

Thanks for your time to answer me, I appreciate this,but I think this is not the case T5 and T7 are SSD no SD.
I tried even to record 1080p 24fps,but again it's not working. Is someone from the BlackMagic developers answering questions here?

I know they are SSDs, but they work in a very similar way, with a firmware that controls how they record data. BMD cameras are more picky with SSDs than they are SD cards. SSDs were designed as computer recording media, and record data in packets. How they record determines if they will work for recording camera video stream, which is continuous, and not in packets. Most SSDs have some type of buffer memory that sores the incoming signal while the card writes out its packets of data. How the SSD handles this, determine of it will work for video.

Bottom line, is you need to use the SSD media, tested and recommend by BMD.
Cheers

As Denny has stated multiple times in the thread, this is not on the approved media list and be aware that this disk has a USB 3.2 Gen2 (10Gb/s) interface. The Video Assist 12G is USB Type-C 3.1 Gen 1 (5GB/s).

I am having the same problem with the Samsung T7 2GB.

Note that the release notes of the Samsung SSD T7 state that it is "backward compatible" and supports USB 3.0 as well:

(May not post URL but just check the tech specs.)

USB 3.0 supports 400 MB/s which should be sufficient for the non-raw codecs?
What is more, the T7 on my PC is definitely 3x-5x faster than the SD Cards which work flawlessly so far.

So is the problem the rather restricted USB standard implementation on the Video Assist or is it really a reliable performance problem of the SSDs?

If the implementation on the Video Assist is the problem, we need to start hording compatible SSDs now before they are not available on the market anymore...

The SSD recording was the major reason I bought the Video Assist, so this is rather disappointing.

The problem is, the T-7-card was designed for use with computer applications, not video capture, and it can not sustain the data rate required for video. The card is also not on the BMD approved list for this very reason. You need to get the 1TB or 2TB T-5 card for video capture.
Cheers

Has anyone had any luck using M.2 Pcie SSD’s inside a usb 3.1 enclosure? If working has anyone tried one of the 4TB versions?


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