The Roland V-4EX is a live and webcast video mixer with integrated multiviewer and HDMI input/output. It supports 1080p/RGB WUXGA (1920x1200) on 1080p input and output. It can switch between four video sources and output them in HDMI, RGB, YUV, Composite and USB stream. A synchronizer per input allows switching of non-synchronous video inputs.
It features a Luma, Chroma keyer and PIP, including 259 transitions and 148 effects. The mixer has a T-bar, with three transition curves and the T-bar itself can move freely. The audio mixer accepts embedded HDMI or unbalanced analog audio and embeds it into the HDMI output. It can delay the audio up to 4 frames for lip-sync. The multiviewer screen shows all 4 inputs and can switch from one to the next by touching the on-screen view. The V-4EX features 1080p or 1920x1200 upscaling on the HDMI/RGB output.