VOGONS

Epiphan VGA2Ethernet Frame Grabber Low FPS

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First post, by Midnight Geek

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Hello guys,

I'm posting this after 6-7 hours of trying everything...

I have an Epiphan VGA2Ethernet Frame Grabber device and I'm using it to capture footage from old computers. The only problem I have is that the captured footage has very low FPS, around 10 FPS when using 1600x1200 on the old computer, or 20-30 FPS when using lower resolutions.

Did any of you had this or a similar device, and can point towards a solution?

The device works like this:

1. DVI cable between the old computer and the VGA2Ethernet device
2. Network cable between the VGA2Ethernet device and the modern computer (where I'll be recording the output from the old computer)

Thanks a lot!

Reply 1 of 2, by weedeewee

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looking at the user manual...
Gigabit ethernet
encoding of video or captured image seems to be done on the pc that does the capturing

you are capturing 1600x1200 resolution likely 24bpp ergo 3 bytes.
for ease of calculation that's 6Megabyte per image
you attain around 10 fps at that resolution, 60 Megabyte per second
Over a gigabit ethernet connection the absolute maximum fps at that resolution, by rough calculation without taking into account overhead, would be 16fps .

I'd say you're at the maximum you're going to get. disabling any unnecessary protocols on the ethernet interface you are using for the capture device might give you an extra fps .

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Reply 2 of 2, by PcBytes

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IMO you're better off with a solution that can convert VGA signal to HDMI, then using that in conjunction with one of those small HDMI capture devices that can be run thru OBS. I'm in quite a similar point where I want to record both retro PCs and PS3/360, and figured this out just recently - VGA-HDMI to cover my retro PCs up to anything pre-DVI (3dfx, Kyro, TNT2 and the likes), straight DVI-HDMI for anything that features a DVI port, and HDMI for the PS3/360s.

I'm not sure if I'm allowed to link it, but I did find such an adapter (and it ain't much expensive, around 64RON) which works with any HDMI capture card.

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