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It could be that your Mac can't generate the needed frame rate with the HDMI port for your production environment. Also the Blackmagic Design products are capable of generating video signals with different frame rates.

So why would one use the SDI Playout anyway? If your setup is working with SDI only, then you need the Mac to deliver an SDI signal. This cost some CPU performance of course.

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On the other hand, if you use the SDI Playout, the Mac needs to download the video image from graphics card into the CPU memory and process it here in order to push it to the hardware device which generates the SDI signal. For the graphics card it doesn't matter if it needs to output the video frame on the main screen and additionally on the secondary HDMI port. Because mimoLive processes all the video data on the graphics card, the final video frame is stored here too. Usually the HDMI video signal comes from the same graphics card in your Mac which also drives your main screen.

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If you can use an HDMI signal in your setup, the Full Screen Playout is way more efficient than the SDI Playout. 'Is there a difference in CPU/GPU requirements between Full Screen Playout and SDI Playout? In other words, does one require fewer resources than the other?' What if we use that instead of the SDI Playout? Another question for the Boinx Brothers™: Trying to record to H.264 is more CPU intensive than recording to ProRes, but even with ProRes, the iMac isn't quite able to muster the necessary power to render all the frames to the hard drive.īut wait! mimoLive also offers a Full Screen Playout function. We are able to record as well, but we're dropping some frames. With this setup, we can switch both cameras, show two PinP effect simultaneously, stream and output to the client monitor via the SDI Playout. That way mimoLive doesn't have to do any frame rate conversions or deinterlacing. Our second effort was to convert both incoming camera feeds to 1080p30, with Decimator MD-HXs. All the ATEMs are limited to only one DVE effect!

Though well intentioned, this turned out to be a flawed plan because of this client's requirement of two simultaneous picture-in-picture effects. That way, mimoLive would only have to deal with one video stream at a time. My first thought, to ease the burden, was to introduce an ATEM Television Studio HD switcher into the mix to handle the incoming video streams. So, the question now becomes Will the iMac have enough processing power to deinterlace two 60i video streams while streaming, recording and playing out? After some testing, it became clear that this was asking too much of the machine. The deinterlace filter will combine the last two interlace fields and provide a full frame to the layer stack.īottom line: mimoLive converts all the sources to the document resolution and frame rate when they are rendered in the layer stack. If you do not use the deinterlace filter, the source will provide the last field that it got from the device. If a Placer layer is supposed to display a source that is 1080i60, it will ask the source for the image that is available at the time the layer stack renders its frame. If the document is 1080p30, every 1/30 of a second, a frame is rendered by the layer stack. 'How does mimoLive deal with video sources that don't match the document? Let's say you have a 1080i60 video source, but mimoLive is set to 1080p30. To meet the first challenge of dealing with interlaced video signals, I contacted the Breidenbach Brothers of Boinx™, Oliver and Achim, and asked the following question: Will the 100' HDMI cables the client already purchased and installed, be reliable? Will his iMac be able to process two camera streams, two picture in picture effects, encode a live stream, output to a client monitor, and encode a file for recording––all at the same time?ģ. He has two old Canon Vixia cameras that only output 1080i60 via HDMI. He would like to record a local backup copy of the meetings as well, as he occasionally needs to go in and pull out one specific section of video.Īfter discovering that he has a fairly recent iMac to work with, my thoughts turned to mimoLive, my favorite Mac-based switching/streaming software. Output a program feed to a client monitor.ģ. To stream privately to YouTube and switch between two cameras and a two camera multi-view.Ģ. I've been working with a local lawyer, who regularly hosts focus groups.

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