what exactly affects the "update speed" of growing files?

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Rick van den Berg

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what exactly affects the "update speed" of growing files?

PostMon Apr 14, 2025 7:27 pm

I'm really into growing files lately, to eventually do some live editing in resolve. But I keep getting bad results. (slow/unpredictable/unreliable updates) So I tested a lot of different things, codecs, different file locations, different "segments", etc. For recording, I used software like softron movierecorder, OBS and Vmix.

Just now I also tested it with an Atem mini pro (with SSD connected to the usb output of the Atem), and accessed the SSD via the Ethernet port which is directly connected to the hub of my Mac Studio, and I got stable updates every 5/6 seconds. much better! I'd like "realtime" eventually, but I can live with this for now.

But this doesn't feel logical, as it has to go through both ethernet and usb, while testing with the the other software, resolve was reading the files directly from the desktop, which in theory should be much faster.

For good measure I also placed the growing files from softron on the atem-ssd via the ethernet port, so essentially the exact same route to resolve. But this also gave bad results.

I'm kinda lost. What exactly is the reason why every recording software gives "bad" results, while the atem-route gives better results? Will it also be better with an atem with 10Gb connection, instead of 1Gb? (by the way, premiere handles the files from anywhere pretty well, but the quickest setting is 10 seconds)

eventually I'd like to have the flexibility to work with softron.
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pchevalier

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  • Real Name: Pierre Chevalier

Re: what exactly affects the "update speed" of growing files

PostThu Apr 17, 2025 2:10 pm

Hi Rick,

This is Pierre from Softron. I’m happy to share that we now have a pre-release version available for testing, featuring the improved growing files support for DaVinci Resolve that we announced at NAB this year.

We’ve updated our Help Center article with detailed information, which you can find here:
https://softron.zendesk.com/hc/en-us/ar ... 4293287196

The pre-release version of MovieRecorder 4.6 is available for download here:
https://softron.zendesk.com/hc/en-us/ar ... 0270031388

Please note that this version should be officially released soon (following some final testing). If the article or link is no longer available when you check, it means the official release has gone live, and you can download it from our website.

Feel free to reach out if you have any questions — I’m happy to help!

Best regards,

Pierre
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Rick van den Berg

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Re: what exactly affects the "update speed" of growing files

PostThu Apr 17, 2025 3:12 pm

Hi Pierre, that sounds great!

I will check it out soon and report back.
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Rick van den Berg

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Re: what exactly affects the "update speed" of growing files

PostTue Jun 03, 2025 7:10 am

Hi Pierre, sorry for the late reply.

I have tested it extensively, and the results were pretty good! I noted a delay of +-6 seconds (which is good, it's comparable with the ATEM workflow). One weird thing I encountered was that when testing it with NDI test patterns, there were some audio dips. With embedded audio from SDI, everything looked fine (which is more of a real world thing for me)

So it looks promising overall!

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