If your system has the appropriate hardware, you can preview your work on a broadcast video monitor. Video previewing is available for Composite on Windows 32-bit. Depending on the level of performance of the video output card and the graphics card, as well as the host system CPU, Composite can achieve real-time previewing of 1920x1080 24P resolutions (and below) of 8-bit RGB or RGBA material.
Composite will only display 8-bit pixel formats on the video preview device. To display 16-bit float and 32-bit float images, you must convert them to 8 bits. You can do this by using a display modifier in the Player that converts to 8 bits, such as the sRGB, 3D LUT, or Convert Depth tools—see About Utilities. Or you can add and connect such a node inside your composition to explicitly convert your material to 8 bits. Also, see Initialization Variables for the initialization variable for previewing video.
