MagewellUSB Capture HDMI Plus

It doesn't detect 1440p and goes to 1600x1280 or something like that. Very disappointing considering how much I spent on it and it apparently is supposed to detect up to 4k. Do not get if you are using 2560x1440. My PC also had a sound echo problem after using it.

I chose this because Magewell products tend to have solid reviews and the company officially supports Linux. My only reservation is that the product and documentation don't lay out the basic gotchas you might run into, so I'll do my best to cover those at the bottom of this review.In general, it does what it says. You can give it up to a 4K signal at 60 Hz and it will pass the signal through to the HDMI loop unaltered, and downsample it over the USB to a maximum of 1080p at 60 Hz.Strangely, the box only says it take up to 30 Hz at 4K, but the online description, my eyes, and my TV all agree that it works at 60 Hz.There seems to be a short delay between the source and the USB output. If I were to estimate, it looks like about a quarter second when it's outputting 1080p60, and I think it may be less at lower settings. I expect this would only be a problem if you're trying to play action games through the USB capture. I don't notice any delay on the loop-through output so I'd suggest playing such games through the loop-through.The headphone jack does work, but I'll caution it is not amplified. If you try to plug headphones without an amplifier in you will have a very hard time hearing it.Technical gotchas:First, be sure you're using a USB 3.0 or higher slot on your PC. The easiest way to tell is a USB 3 slot has a blue plastic insert. If you try to use a USB 2 slot it will actually work, but you'll be limited to lower resolutions and frame rates. I did not see any indications from the device when this was happening.Also note this does NOT strip HDCP, and if it receives an HDCP-encrypted signal, it will just output a black screen. Verify that whatever device you want to capture supports non-HDCP output. Off hand, the PS4, Wii U, and most PCs will work fairly easily. Most other peripherals could pose an issue, so be sure to Google a bit to know if your device will work with this.And a Linux-specific note: As far as I can tell, the official drivers don't do anything, at least on modern kernels. This is a minor deal as the generic V4L drivers seem to work perfectly. I installed the official ones to see if they might allow some more specialized configuration, but they don't even detect the device.

This is an incredible piece of kit. Throw any resolution at it and it just works. I needed to capture various devices (from 800x600 up to HD) and throw them on my monitor in real-time. There is an imperceptible delay (a few milliseconds?) only. Unlike the AVerMedia LPG Lite which has about a second delay between source and capture. However, the real delight of this card is that it really looks like a WebCam to the PC. You don't need to run any software, it's just a webcam. I capture my device, throw it on my monitor and mix that with other sources for technical live-streaming tutorials. Really fine. You really do get what you pay for. I hate to think the number of people that ended up with a top of the range capture card like this after spending half that again initially trying to go cheap. Splash out. You won't regret it. Really superb.

ソニーのa7s3のUSB Webcam接続では遅延が激しかったのですが、a7s3のHDMI出力から本製品をキャプチャーすると、遅延が大幅に低減され、さすがの性能でした。遅延(latency)が問題の方にはお勧めです。

After trying many cheaper USB capture cards that didn't work with my "unusual" output resolution (Kenwood TS-990), I did what Callum from DX Commander suggested, and purchased this unit. I have no regrets. It was actually worth the money. Plug and Play, no lag, loop through option, perfect.