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It was only doing 1080p at 30 FPS, so I’ve tried another one meant to support but it did not strip HDCP. I’ve bought an Acelink HDMI splitter 1×2 that always worked with Mac so far, but I can’t find the same on Amazon at the moment. The same model can have internal re-design that are not necessarily advertised… įor us mere mortals, that means one same model from a vendor can have a batch that strips the HDCP and another batch that don’t, depending on the internal chip being used. The problem, that’s usually an “unofficial” and not well appreciated “feature” for HDMI devices, who are meant to buy a license for implementing HDMI hardware. Tha t said, a some useful and cheap little device, an HDMI splitter, can be used to strip off the content protection from the signal, so that it can be recorder. For you and the presenter, that’s undesired and frankly annoying. The problem is that the HDMI capture devices (such as the LGP2 or others I’ve tried) don’t support recording HDCP (by design). Make sure you are aware, and test your equipment with Mac owners as early as possible. There are, to my knowledge, no way to disable this. When a Mac projects any video content over, HDMI (also via USB-C’s Display Port Alternate mode), it automatically protects it with HDCP. ![]() There are other things you could try, like using the NDI protocol or RMTP to send the capture to another device doing the mixing, but that’s advanced, and I’d consider it hacky. Make sure they also record the audio even if you have it covered, because it will help you synchronise the tracks in post-production based on the audio.īut that approach goes against the rule to “avoid the need for post processing”.īecause you have to make sure every speaker has the software installed and configured, it’s too unreliable to rely on this for an event with many sessions and speakers. Keep this in mind as a backup or last resort: You can ask the speaker if they’ve got a way to record their screen with an app, such as Camtasia or OBS. ![]() Capturing the screen from the presenter’s laptop the ones mirroring 1 input, into two outputs), are recognised as a monitor with a maximum resolution of 1920×1080 pixels to the OS. If you don’t enforce (whether by process, configuration or device) the right resolution for your capture device, you may need a down-scaling (or up) device, like the Decimator (see below).Įven if your capturing device supports higher resolution, leaving the down-scaling task to your laptop will consume a fair amount of precious CPU cycle. It can either stop working completely or record something cropped without you realising it until it’s too late.Īlways ensure that the HDMI input going into your capture device is of a supported resolution, and do a test recording after each room setup. The biggest problem is probably if you get a resolution or aspect ratio that is not supported by your recording device or projector. Some projector supports resolution up to 4K, but I doubt it’s of any value for the audience if your displaying code or PowerPoint. Nowadays, all venues should be supporting resolutions of 1920 * 1080 pixels on a 16:9 picture aspect ratio, but it’s worth making sure that’s what you get. It’s good to make sure what’s supported by the venue or equipment you will be using.
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