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Multicorder failed on SDI drop / change
Rank: Advanced Member
Groups: Registered
Joined: 6/26/2011(UTC) Posts: 30 Location: London
Was thanked: 8 time(s) in 4 post(s)
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I experienced a behaviour with Multicorder which may be unavoidable, but thought I should report it in case there is a workaround.
Was using the Multicorder to save isos of various inputs:
4 x HDSDI through a Blackmagic Decklink 1 x NDI, vmix desktop capture from another machine.
All SDIs at 50mbit H264 (CPU, not Hardware encode), NDI just saving it's MOV.
One of the cameras on HDSDI was coming in via a Teradek Bolt. The camera op needed to switch out Vlock batteries, so the power to the Teradek dropped. The bolt receiver does some kind of refresh, I think maybe it defaults to a different resolution / frame rate or something. The input in vMix reacts to this, flickers, not sure exactly what it's doing.
The Multicorder stopped, threw up an error. I can't remember exactly what, we were live and everything else was working fine so I just had to get on with it.
I can't recreate this to further test and isolate exact conditions as the Teradek Bolt was rented and went back immediately after the gig.
It's understandable that a recording would fail if a HDSDI source did suddenly change it's resolution or something. However it's a shame that it causes all the records to stop, or that it doesn't just self restart when a source returns.
Worth noting that the computer was well within it's capabilities, CPU barely above 15%, GPU memory 50%ish, recording to nvme SSD. The 2 main recordings, live stream, external output (Blackmagic Decklink), both independant Full screens, all continued completely unaffected as far as I'm aware. I was sending output 1 as a SRT feed to one of the camera ops, he did report that it dropped out for him but recovered quickly.
Is this expected behaviour, and is there a workaround? Let me know if I can provide any more info.
Cheers Andrew
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Multicorder failed on SDI drop / change
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