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vMix system build - configuration?
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filmmaker75  
#1 Posted : Monday, August 17, 2015 5:13:10 AM(UTC)
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Hi, I'm new to vMix world and I think it's a great piece of software.
I need to buy a new PC dedicated to vMix.
This is one possible configuration:

CPU: intel i7 4790
MoBo: Gigabyte GA-H97_HD3
RAM: 8Gb (2x4) DDR3 Kingston
VGA: EVGA GTX750 Ti 2Gb
HD: Western Digital Blue 1Tb (for System & Archive)
SSD: 250Gb Crucial MX200 (for video recording)

Connections needed:

4 HD-SDI video input (decklink quad??) (4 cameras)
1 VGA output
1 composite output

1 XLR input for main audio


This configuration is good? I need an additional sound card?
I don't need to record all cameras but only the "program".
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IceStream  
#2 Posted : Monday, August 17, 2015 8:19:44 AM(UTC)
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@ filmmaker75

The specs on your build look decent depending on what you are doing.
I would be inclined to switch your drives and use the SSD as primary and if you are doing sports and 'Instant Replay' consider an additional SSD and upgrade the video card as per the recommendations:

http://www.vmixhd.com/re...?SystemRequirements.html

But otherwise, for 'general' use, you should be fine.
If you are using additional XLR audio inputs, I would look into a USB mixing board as opposed to an XLR input card, but that again, depends on your overall purpose.
In terms of HD-SDI capture cards, there are a lot of supported ones to choose from:

http://www.vmixhd.com/supported-hardware.aspx

The rest is up to you. If you know what you need, great, if you are unsure of what you can "get away with", you are best to test and experiment as much as possible.
Using an i3 laptop and a webcam is all you need to get started with vMix, and that's fine if it meets your needs, but being prepared for "everything" is a different matter altogether.
Overkill and redundancy are the mantra of "professional" set-ups, and that comes at a cost.

Just my thoughts.


Ice
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filmmaker75 on 8/17/2015(UTC)
filmmaker75  
#3 Posted : Monday, August 17, 2015 10:12:48 AM(UTC)
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Thank you IceStream for your fast response.
I have no need of 'Instant replay'. My usage is for theater and ballet, all at 1080p 25fps.
So I can record HD video on a mechanical hard disk?
For the audio I just need an XLR input. In theater there is already an audio/light service with its mixing console.
I have to be able to send a composite video signal or VGA signal to a video projector and record HD directly onto internal Hard Disk or SSD.
Usually we do not use more than 4 cameras simultaneously. Often only 2 and we record always all cameras onto internal SD of each one (like ISO recording).
I chose the blackmagic for cost and 4 inputs but if you have a better choice, tell me.
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rrpro  
#4 Posted : Monday, August 17, 2015 2:04:45 PM(UTC)
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I would be considering one of these: https://www.blackmagicdesign.com/products/decklink

Some of them include Balanced Audio input and output.

Besides this, you only needed to use your Graphics Card to output Composite and VGA.
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Speegs  
#5 Posted : Tuesday, August 18, 2015 3:29:33 AM(UTC)
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filmmaker75 wrote:
Hi, I'm new to vMix world and I think it's a great piece of software.
I need to buy a new PC dedicated to vMix.
This is one possible configuration:

CPU: intel i7 4790
MoBo: Gigabyte GA-H97_HD3
RAM: 8Gb (2x4) DDR3 Kingston
VGA: EVGA GTX750 Ti 2Gb
HD: Western Digital Blue 1Tb (for System & Archive)
SSD: 250Gb Crucial MX200 (for video recording)

Connections needed:

4 HD-SDI video input (decklink quad??) (4 cameras)
1 VGA output
1 composite output

1 XLR input for main audio


This configuration is good? I need an additional sound card?
I don't need to record all cameras but only the "program".
Thanks


Roland Tri-Capture for XLR input.
Magewell XI400DE-SDI for 4 x HD-SDI.

= My formula for no problems.

Not sure about your outputs as well I only deal in HDMI/DVI output these days. I assume you could use a converter if you didn't get a video card with your desired output with the native ports.
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filmmaker75  
#6 Posted : Tuesday, August 18, 2015 3:59:22 AM(UTC)
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@rrpro I have considered the decklink quad with 4xHD-SDI in/out

@Speegs Roland Tri-capture does not have XLR line input, only MIC. The gain is too high for a mixing console output. I think that the Magewell XI400DE-SDI is a good compromise! Thanks you


Another question:
I have a PC at no cost, with these features:

CPU Intel i7 3770
MoBo ASUS P8H77M-PRO
RAM 8Gb (2x4) Corsair Vengeance DDR3 1600
Gigabyte GTX750 OC 2Gb
SSD Crucial MX200 250Gb
HD Western Digital Blue 1Tb


I can use this , or should necessarily buy new PCs described in the first post ?

Thanks guys
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IceStream  
#7 Posted : Tuesday, August 18, 2015 12:31:59 PM(UTC)
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@ filmmaker75

"No cost" is always a good place to start, with of course the 'proviso' that it's a no risk trial that may or may not work out.
In this case, the specs look pretty good. The things to look into are available expansion slots on the MB and compatibility with capture cards you are most attracted to.
On the surface, I see no issues with this system and what you plan on doing with it other than the GTX750 may be pushing it's limit with 4 HD sources and whatever special effects you apply in vMix over the course of several hours, but that again can only be determined through trials and tests (typically Nvidia GPU designations > x60 are preferred, but the x50 may be just fine).
As I have suggested earlier, test, test, test...
You may be surprised at what you can 'get away with'. vMix is a very powerful tool and is capable of some amazing things that would otherwise cost 10's of thousands of dollars with traditional hardware, but those 'things' aren't always necessary for every user and so lesser powered computers work just fine in those scenarios, the issue becomes, some people expect and try to do too much with dual core and i3 machines with integrated graphics and run into problems.
Your situation looks pretty good but you won't know for sure until you test things out.


Ice
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filmmaker75  
#8 Posted : Tuesday, August 18, 2015 12:41:23 PM(UTC)
filmmaker75

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Thanks a lot Ice!

With this system in my hands I can do all the tests and then I can always change the video card.

Another question for you about the audio input.
If I connect the mixing console audio line output to one camera, can I use the audio came from the SDI input in vmix? Is it embedded?

Thank you in advance and sorry for too many questions.
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IceStream  
#9 Posted : Tuesday, August 18, 2015 3:58:22 PM(UTC)
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@ filmmaker75

If your capture card is configured properly, I would say YES, the audio should be embedded.
(as long as your camera is capable of accepting a 'line' input and your levels are good)
Then it is just a matter of setting that camera's 'Audio' to "always ON" in the Audio Mixer panel (Double arrows OFF and Speaker icon ON).
Alternatively, you may be able to input the audio independently, but you will need to experiment and test that.



Ice
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Speegs  
#10 Posted : Wednesday, August 19, 2015 6:56:16 AM(UTC)
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filmmaker75 wrote:
@rrpro I have considered the decklink quad with 4xHD-SDI in/out

@Speegs Roland Tri-capture does not have XLR line input, only MIC. The gain is too high for a mixing console output. I think that the Magewell XI400DE-SDI is a good compromise! Thanks you



I'll have to watch out for that, I'm usually getting audio from someone else's mixing desk they might be adjusting the level down to Mic level, I'll ask next time. I work with 4 different sound contractors and I like I can take 3 types of possible cables they usually pick one we do a test and I sometimes modify the level a little on my device ever so slightly during the 8 hour event.

I could end up using XLR, RCA, 1/4 Jack depending on what the other guy wants/has. I seem to see most of them wanting to use XLR of course saying it's better, I can't hear the difference between any of them when working properly :) My requirements are not difficult it's just voice I'm capturing and not singing or music.
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