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nomski  
#1 Posted : Thursday, April 15, 2021 9:12:41 PM(UTC)
nomski

Rank: Advanced Member

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Joined: 10/14/2016(UTC)
Posts: 45
Location: Sheffield

We are having issues with smooth replay playback. It's driving me nuts. The only way we can fix it consistently is by having a trigger which stops recording during playback. Surely it should be able to record and playback at the same time? The PC specs are:
- Ryzen 3700X
- 16GB RAM
- GTX 1660 6GB
- Corsair Force MP600 500GB M.2 hard drive with 4950MB/s read and 2500MB/s write speeds.

The inputs are a mixture of SDI and NDI, all framerates and resolutions are 1080p50 on all inputs and outputs.

The only thing I'm wondering is whether having a single drive in the PC is the issue and if we need to have a separate drive for replays and system.

Any ideas?
kross  
#2 Posted : Saturday, April 17, 2021 10:33:50 AM(UTC)
kross

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How many cameras are you recording in your instant replay settings? Are your streaming and/or recording settings using hardware encoding? What's your CPU utilization %? GPU utilization %? What speed is your RAM? Are you running it at that speed (default BIOS settings will run RAM at the slowest speed)?
matkeane  
#3 Posted : Saturday, April 17, 2021 7:58:57 PM(UTC)
matkeane

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France

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Originally Posted by: nomski Go to Quoted Post
The only thing I'm wondering is whether having a single drive in the PC is the issue and if we need to have a separate drive for replays and system.


I haven't actually used the Instant Replay feature yet, but the system requirements on the help page mentions a dedicated drive for video capture. Even if it wasn't a strict requirement, I pretty much always use a dedicated drive for recordings (even single channel) to avoid problems.
Stuart McCafferty  
#4 Posted : Monday, April 26, 2021 10:12:08 PM(UTC)
Stuart McCafferty

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Joined: 12/8/2020(UTC)
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United Kingdom
Location: Larbert

Thanks: 1 times
We found that having different cameras using different inputs on vmix being an issue. we used to have one coming in via SDI into a blackmagic another via HDMI using an elagato and another converted from HDMI to SDI and into a balckmagic.

We've decided to just use 1 camera for replays and it sorted this issue out, this was prior to having vmix 24 and will test during the summer multiple replays again
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