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Magewell 4K capture -- can I trust what I'm seeing?

After giving up on my Inogeni 4k capture card, I bought a Magewell USB Capture HDMI 4K Plus device.

I was thrilled when I plugged in my JVC 500 camera and the System Device Properties showed it was at 3820 x 2160. I connected a JVC 170 and it also showed it was 4K. But then I plugged in my JVC 250, and it ALSO showed 3820 x 2160--which it shouldn't have done because I had the HDMI output set to HD--not 4K. Then I plugged in an old 1080p canon (with an HD cable, not a 4K cable), and it also showed 3820 x 2160 in System Device Properties!

So, what is going on? Can I trust that I am truly bringing in 4K video when it says also says 4K for an HD camera? Is it just automatically scaling to match my 4K canvas size?

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    • CraigSModerator
    • Telestream Desktop Forum Moderator
    • CraigS
    • 2 mths ago
    • Reported - view

    For the 4k cameras they should be accurate. It's possible Wirecast is showing all options including 4k even if the specific camera is only HD. In System Device Properties < Format does it give you a 1920x1080 option as well.

    I was using a different device but it may present multiple choices so you may need to pick the 1080 Resolution for the HD camera.

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    • CraigSModerator
    • Telestream Desktop Forum Moderator
    • CraigS
    • 2 mths ago
    • Reported - view

    Magewell does have a device that allows you to make changes in their USB capture devices but you shouldn't need this since you want the 4k option. You might want this anyway though.
    https://www.magewell.com/usb-capture-utility-v3

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  • Yes, it gives me all those resolution options. I just thought it strange that it wouldn't automatically pick the 1080 frame rate when that was what was coming in from the HD camera.

    I actually just had the Magewell AND the Inogeni both capturing at 4K at the same time with 2 different cameras, but the Inogeni is so flakey I don't know if I can trust it to work on a regular basis.

    Thanks for working on Thanksgiving day!

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    • CraigSModerator
    • Telestream Desktop Forum Moderator
    • CraigS
    • 2 mths ago
    • Reported - view
    Jerel Peterson said:
    I just thought it strange that it wouldn't automatically pick the 1080 frame rate when that was what was coming in from the HD camera.

     There's another user reporting the same thing. It seems specific to macOS (doesn't happen on Windows) so it seems the OS is part of this. I'll mention it to the developers since it's creating some confusion. Basically, it's best to select the resolution the camera sends for the best quality.

    Jerel Peterson said:
    he Inogeni is so flakey I don't know if I can trust it to work on a regular basis.

     Magewell is a much better built device for professional work.

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  • will Wirecast have a problem if I buy a second Magewell (or Inogeni, for that matter)? I remember I couldn't use 2 of the same model webcams some years ago, or 2 of the same model Canon HD camcorders. Wirecast would get 'confused' and end up showing video from one camera to both shots.

    Lately, the Inogeni has started reliably capturing 4K video as well.

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    • CraigSModerator
    • Telestream Desktop Forum Moderator
    • CraigS
    • 2 mths ago
    • Reported - view
    Jerel Peterson said:
    Wirecast have a problem if I buy a second Magewell (or Inogeni, for that matter)?

     It's not Wirecast so much as your USB bus bandwidth. Especially if you're using 4K sources you should have each device on a separate bus (there are 2 buses on some computers). You can see that in Wirecast Window > USB Devices. Since other nonvideo devices can use bandwidth I'd suggest enabling Show All Devices. Wirecast gets that info from the system information so it's up to the computer's bus capacity. Sometimes dropping to 1080 will help a bus bandwidth issue as well as changing the codec being used (MJPEG for example) but that depends on the device's options.

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  • Well, one step forward, two steps back. Now the Inogeni is working better than the Magewell. 

    I'm using a Mac Studio:

    • Apple M1 Max 10-Core CPU
    • 64GB Unified RAM | 4TB SSD
    • 32-Core GPU | 16-Core Neural Engine

    When I was just hooking things up in my house, it seemed like everything was going to be fine. Then I took everything up to the school, and major problems ensued.

    The Magewell seemed to be working much better than the Inogeni, but when I used the Magewell to test out an actual basketball game, the picture was terrible. As far as I can tell, it is because the Magewell is reporting 60 fps, but my camera can only output at 30. I'm getting very jerky video. I did run the Magewell utility, but didn't see the part about changing the frame rate until I noticed another person's post just now. (the computer is back at the school)

    Anyway, I switched back to the Inogeni, which worked this fall during volleyball (except for the fact that I'm not sure I actually had it set for 4K). The Inogeni reports 30 fps, and the video looked smooth.

    I added a 1080 camcorder to point at the scoreboard. Worked fine. Except when it came to stream. This fall I had no problem doing a 4K and a 1080 stream simultaneously. Adding this new camera on top of the main video (a 20% PIP in the corner), caused the stream to crash every time, even though the CPU was only in the mid 60s. (I've been much higher than that on Windows machines).

    I can live without the scoreboard (temporarily, anyway). What was worse was that for some reason the 1080 stream NEVER appeared on Youtube. I must have tried close to 10 times, and even after removing the scoreboard camera, the 1080 stream never made it to Youtube. I even started the 1080 stream separately first, then added 4K later, yet no 1080 version appeared on Youtube. This was never a problem this fall.

    Settings are X264 for encoder, Qual =2 (super fast encoding), Keyframe every 120, 60 FPS, 26,000 avg bit rate. These are also the same settings I used this fall for volleyball, and all was well.

    The first game is in two days. This is a fairly rural area, and a lot of people don't have the bandwidth to do 4K. For now, I'd be happy to just get the 1080 stream working along with the 4K--as it was before. I'll worry about the Magewell and scoreboard later.

    My plan was to add 2 more 4K cameras, but until I get the capture card problem figured out and determine if the CPU can handle it, I'll take it one step at a time. I'm hoping that just switching between 3 cameras won't be as taxing on the CPU as overlaying a pip.

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    • CraigSModerator
    • Telestream Desktop Forum Moderator
    • CraigS
    • 2 mths ago
    • Reported - view
    Jerel Peterson said:
    As far as I can tell, it is because the Magewell is reporting 60 fps, but my camera can only output at 30.

     That sounds like an issue with the Magewell. Wirecast should allow you to choose 30fps. The Magewell Utility allows you to set that as well.

     

    Jerel Peterson said:
    caused the stream to crash every time,

     The stream crashed? Sorry, that doesn't make any sense since the CDN shouldn't care. 

     

    Jerel Peterson said:
    even though the CPU was only in the mid 60s. (I've been much higher than that on Windows machines).

    Sorry but not enough info there. Perhaps you're taxing the computers' resources but I can't comment on that. You need to test and report details. 

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