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    Low latency capture card

    How To... ?
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    • F
      fifou last edited by

      Hi all,
      I'm looking for a low latency composite video capture card. I'm working on a show with 3 video cameras (maybe 4) with a video switcher.
      I'm capturing selected video signal with a Canopus ADVC-55 (video to FireWire).
      Latency is obvious.. I compared it with a Sony PS3Eye and it's another world !
      For a lot of reasons, I cannot connect 3 PS3Eye to my laptop.
      Any advice about finding a faster capture device ?

      Best
      Philippe

      MacBookPro 15' 2012 - QuadCore i7 @ 2,66GHz - 16GB RAM - NVIDIA GeForce GT 650M 1024Mo VRAM - 2 Internal SATA SSD Hard Drives - OSX10.13.6 - Isadora 3.0.7

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      • keftaparty
        keftaparty last edited by

        Hi, a LFG4 ( search for it in the forum ) in a thunderbolt expansion box ( magma/sonnet/netstor/... ) should give quite good results.

        This card is for what I know one of the bests in terms of latency.
        Best
        Mehdi

        ...
        Mehdi Toutain-Lopez
        www.toutain-lopez.com

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        • Armando
          Armando Beta Gold last edited by

          How can we mesure capture card latency in a precise way? the eye..... has 40 ms latency itself....

          Armando Menicacci
          www.studiosit.ca
          MacBook Pro 16-inch, 2021 Apple M1 Max, RAM 64 GB, 4TB SSD, Mac OS Sonoma 14.4.1 (23E224)

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          • Fred
            Fred last edited by

            A reasonable way to measure latency requires a few tools.

            2 monitors with a known latency or the same model with the same latency
            Some kind of video playback device with pre recorded timecode
            1 camera
            Play timecode from the playback device with a splitter 1 signal direct to the monitor and 1 to the capture device, take the output of the computer and plug it into the second monitor and use your software to display the capture input onto the monitor (both monitors should be identical and connected with the same connection type ie SDI or composite). Film both monitors at once with a camera whilst the timecode is playing back. You can then read the timecode and subtract the number of frames difference between the 2 monitors and you get your latency. You can try and check the latency of your monitor the same way by displaying timecode on your laptop and mirror the output to your monitor (LCD monitors still have delay and large beamers can have a lot).
            If you want to get really specific you can read the pulses on the video signal with an oscilloscope but I don't think that much detail will help you. 
            Don't worry so much about the eye, we are used to that delay we deal with it every day and the world is not our of sync.

            http://www.fredrodrigues.net/
            https://github.com/fred-dev
            OSX 13.6.4 (22G513) MBP 2019 16" 2.3 GHz 8-Core i9, Radeon Pro 5500M 8 GB, 32g RAM
            Windows 10 7700K, GTX 1080ti, 32g RAM, 2tb raided SSD

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            • dbengali
              dbengali last edited by

              About to do a small project with live off-stage actor on camera via isadora, and live sound, which will not be running through the same computer.

              Knowing that there will be at least some latency in the video, even if we use a fast capture card, are there affordable solutions anyone might recommend to get the audio in sync with the video?
              -David
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              • MatthewH
                MatthewH Beta Tester last edited by

                Any decent digital mixer will have per input channel delay precisely for those sorts of applications.

                Matthew Haber :: matthewhaber.com :: besidedigital.com :: Download my actors: http://www.matthewhaber.com/isadora-actors

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                • Armando
                  Armando Beta Gold last edited by

                  Thanks for the answer Fred. No software solution then isn't it?

                  Armando Menicacci
                  www.studiosit.ca
                  MacBook Pro 16-inch, 2021 Apple M1 Max, RAM 64 GB, 4TB SSD, Mac OS Sonoma 14.4.1 (23E224)

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                  • vanakaru
                    vanakaru last edited by

                    I have Matrox MXO2 that will capture live video good for lip-sync similar to PS3. There are many versions of this card depending what connections to your mac you have.

                    I have read that BlackMagic Intensity will do the same.
                    http://www.blackmagicdesign.com/products/intensity/
                    http://www.matrox.com/video/en/products/mxo2/

                    MBP 4.1 & MBP (Retina, Mid 2012) MBP Retina 2017

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                    • F
                      fifou last edited by

                      Thanks Vanakaru,

                      That's exactly what I meant by talking about "latency" : I'd like a good "lip-sync" when live filming my actors on stage.
                      I'm about to test the blackmagic Intensity Usb3.0 (someone is going to lend me one).

                      Best
                      Philippe

                      MacBookPro 15' 2012 - QuadCore i7 @ 2,66GHz - 16GB RAM - NVIDIA GeForce GT 650M 1024Mo VRAM - 2 Internal SATA SSD Hard Drives - OSX10.13.6 - Isadora 3.0.7

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                      • keftaparty
                        keftaparty last edited by

                        Hi Fifou,

                        I think the usb3 shuttle from blackmagic is not compatible with mac osX. It's a windows only device.
                        Mehdi

                        ...
                        Mehdi Toutain-Lopez
                        www.toutain-lopez.com

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                        • F
                          fifou last edited by

                          You're right Mehdi, but drivers for Intensity Shuttle USB3.0 on mac just arrived !
                          http://forum.blackmagicdesign.com/viewtopic.php?f=11&t=3518
                          But if I buy one, I'll buy the thunderbolt one.
                          Do you think an Intensity shuttle thunderbolt and a Matrox Tripplehead thunderbolt can work together on the same port ? (With a thunderbolt hub of course) ?

                          Philippe.

                          MacBookPro 15' 2012 - QuadCore i7 @ 2,66GHz - 16GB RAM - NVIDIA GeForce GT 650M 1024Mo VRAM - 2 Internal SATA SSD Hard Drives - OSX10.13.6 - Isadora 3.0.7

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                          • N
                            nick last edited by

                            I don't think there is such a thing as a thunderbolt hub - you need a device with two connections (a through connection) to be able to have more than one device connected to a computer with a single thunderbolt port

                            MacBook Pro 11.5.2

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                            • Skulpture
                              Skulpture Izzy Guru last edited by

                              There is the Thunderbolt dock but don't know too much about it if i'm honest.

                              http://store.apple.com/uk/product/HB865B/A/belkin-thunderbolt-express-dock?afid=p219%7CGOUK&cid=AOS-UK-KWG-PLA-PLA_UK_BTB
                              I would love the Intensity Shuttle USB3.0 to work on Mac; would save a few quid! Not just for the device but also the expense of the thunderbolt cable!

                              Graham Thorne | www.grahamthorne.co.uk
                              RIG 1: Custom-built PC: Windows 11. Ryzen 7 7700X, RTX3080, 32G DDR5 RAM. 2 x m.2.
                              RIG 2: Laptop Dell G15: Windows 11, Intel i9 12th Gen. RTX3070ti, 16G RAM (DDR5), 2 x NVME M.2 SSD.
                              RIG 3: Apple Laptop: rMBP i7, 8gig RAM 256 SSD, HD, OS X 10.12.12

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                              • Skulpture
                                Skulpture Izzy Guru last edited by

                                From BM forum:

                                "I can confirm that the USB 3.0 Intensity Shuttle works with the Macbook Pro in Mac OS X 10.8.4\. Use driver 9.7.9."

                                Graham Thorne | www.grahamthorne.co.uk
                                RIG 1: Custom-built PC: Windows 11. Ryzen 7 7700X, RTX3080, 32G DDR5 RAM. 2 x m.2.
                                RIG 2: Laptop Dell G15: Windows 11, Intel i9 12th Gen. RTX3070ti, 16G RAM (DDR5), 2 x NVME M.2 SSD.
                                RIG 3: Apple Laptop: rMBP i7, 8gig RAM 256 SSD, HD, OS X 10.12.12

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                                • MatthewH
                                  MatthewH Beta Tester last edited by

                                  I have a Belkin Thunderbolt Dock and can answer any questions about it. That being said, it doesn't give you any more thunderbolt ports than your computer already has so I don't know what good it would do in this instance.

                                  Matthew Haber :: matthewhaber.com :: besidedigital.com :: Download my actors: http://www.matthewhaber.com/isadora-actors

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                                  • F
                                    fifou last edited by

                                    I just tried, It works !
                                    Blackmagic Intensity Shuttle USB3.0 works on mac OSX 10.8.4. Install osx drivers, plug the card, driver asks for online update, update, it works !
                                    Latency in composite capture is much more acceptable. Is still have some issues with deinterlacing. This card is supposed to deinterlace but it seems it doesnt work... For the moment Isadora does it.
                                    I'll choose this USB3.0 card and save my only thunderbolt port for my forthcoming Matrox Tripplehead..

                                    Thanks all for your comments.
                                    Best
                                    Philippe

                                    MacBookPro 15' 2012 - QuadCore i7 @ 2,66GHz - 16GB RAM - NVIDIA GeForce GT 650M 1024Mo VRAM - 2 Internal SATA SSD Hard Drives - OSX10.13.6 - Isadora 3.0.7

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                                    • Skulpture
                                      Skulpture Izzy Guru last edited by

                                      Hmmmm interesting! Thanks for the update!

                                      Graham Thorne | www.grahamthorne.co.uk
                                      RIG 1: Custom-built PC: Windows 11. Ryzen 7 7700X, RTX3080, 32G DDR5 RAM. 2 x m.2.
                                      RIG 2: Laptop Dell G15: Windows 11, Intel i9 12th Gen. RTX3070ti, 16G RAM (DDR5), 2 x NVME M.2 SSD.
                                      RIG 3: Apple Laptop: rMBP i7, 8gig RAM 256 SSD, HD, OS X 10.12.12

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                                      • J
                                        jgastonraoul last edited by

                                        Just sharing my own experience :

                                        I've just bought an Intensity Shuttle USB3 and it works on my mid 2012 (non retina) MBP on OSX 10.8.5.
                                        But I had to test every single input settings before to find which one was the good for my GH3 and my Gopro (so if you have a black screen while trying to input video from this card, just test other input settings).
                                        I was thinking it would discover itself what are the right ones... (like my TV do...)
                                        And I can't input signal at 1080/25p (I had to change my GoPro record settings to 24p...).
                                        I hope that BlackMagic will fix that in their next driver release...

                                        MBP mid 2012 - quad-core i7 2.3GHz - 16GB RAM - 512GB SSD - OS 10.9.5
                                        http://jgastonraoul.tumblr.com

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                                        • F
                                          fifou last edited by

                                          I had to search right settings too.
                                          And it seems deinterlacing doesnt work.. for the moment I hope.

                                          MacBookPro 15' 2012 - QuadCore i7 @ 2,66GHz - 16GB RAM - NVIDIA GeForce GT 650M 1024Mo VRAM - 2 Internal SATA SSD Hard Drives - OSX10.13.6 - Isadora 3.0.7

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                                          • vanakaru
                                            vanakaru last edited by

                                            jgastonraoul

                                            I wonder how you Gopro works. I have stayed away from using it for live and not testing actually. Do you go HDMI out and do you get clean frame without any icons? I have HD2 sitting araound that I do not use much, but for live there would be a life for it.

                                            MBP 4.1 & MBP (Retina, Mid 2012) MBP Retina 2017

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