1/28/2024 0 Comments Blackmagic desktop video linuxI couldn't get the new SDK working on Linux. Important: The latest version of the SDK (8.5) is ahead of the latest Linux DeckLink drivers (8.0.1). It, and the associated documentation, can be downloaded from The Blackmagic SDK consists of C++ header and source files to build applications using Blackmagic cards along with some samples. You can also grab screenshots, which are saved as TARGA files. Any video you record can be played back by double clicking on the clip listing in the top-left pane. You can then use the Start Capture button or menu item to record raw video. Any changes on the phone's screen should be reflected in the display pane. After clicking Ok, you should see a mirror of the phone's screen in the top-right pane. Your output choices are limited at 1080p60, so just select 8-bit YUV. The DeckLink does not have automatic source-format detection, so you must select the correct format, or nothing will appear in the capture/playback pane.įor example, to capture from the LG phone, ensure that the phone's HDMI setting is 1080p, then select 1080p 60 from MediaExpress's Preferences. The top two drop downs control the input and output formats. To do so, start the program and select Preferences from the Edit menu. I used MediaExpress to verify that I could do a basic capture and playback before I moved onto working directly with the SDK. It is still usable at lesser resolutions, although some of the UI will be cropped. ![]() For best results it requires a 1920x1200-resolution monitor. To run it from Linux, just enter MediaExpress in a terminal. MediaExpress can be useful to discover the DeckLink's capabilities and supported modes. It can be installed from a deb file in the same way. There is also a GUI program in the DesktopVideo package called MediaExpress. You'll need to select the option that includes HDMI input. This utility is mostly used to activate particular hardware inputs and outputs, since not all can be active at the same time. See the readme in the archive for more details on installation.īefore doing anything with the card, you'll need to run the configuration program BlackmagicControlPanel. This will install the kernel module, the shared libraries, a configuration app, and a firmware-updater app. On Ubuntu, the drivers can be installed with dpkg -i and the appropriate (32-bit or 64-bit) deb filename. The archive contains debs, rpms, and tarballs for various distros. The drivers are available at the support page under the not-entirely-obvious name "Desktop Video for Linux". See the Connection Diagrams on the support page linked above. The HDMI slot should be wired to match this. They aren't labelled, but the input port is the one closest to the ePCI connector (e.g. There is an input port and an output port. The HDMI inputs are on a separate slot, connected to the card via HDMI cables. The card has a plethora of adapters for various types of video input. The manual can be found at the card's support page (I don't want to post a link directly to the manual in case they issue a new version and the URL changes). ![]() How this impacts Project Eideticker is unknown but a function of exactly what analyses we want to perform. exactly a 720-pixel high screen, a cropped/bordered output, or the ability to treat the HDMI output as the primary output so Firefox can render at exactly 720p). The only potentially perfect solution with this card would a device that outputs full RGB at 720p and does not do any scaling (e.g. What this means: it's almost impossible to get a pixel-perfect capture of a device with this card. Unfortunately neither of these limitations were apparent in their marketing materials we had to contact support to find out. ![]() Supposedly capturing at 720p is possible with 10-bit RGB, but not 8-bit RGB, for reasons unknown (perhaps due to the fact that the 10-bit formats use their own codecs). Capturing at 1080p50 and up can only be done at YUV 4:2:2, i.e., full 8-bit RGB is not possible.Unlike many TVs, the cards will not crop or add border to output that is larger or smaller than the standard it just won't capture at all. The important part here is that the output must be at a standard resolution, e.g. This means HDMI 720p and 1080p at standard refresh rates and a handful of other standards. They can only capture output at broadcast standards.There are two major limitations in all Blackmagic cards, DeckLink or otherwise:
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