nowadays, there are lots of choices on decoder for security applications,Let us make it simple and effective.

First is basic and best important, video wall consists of a certain number of monitors, monitor quantity decides scale of Decoder, let us take instance of a vdieo wall consists of 9 monitors, it requests a decoder with 9 hdmi output. this decoder connects with these 9 monitors by its 9 hdmi output, in another word these 9 monitors could display a video, that is splice to display.

onvif compatible is necessary.

Second, functions and performance. take instance of a vdieo wall consists of 9 monitors:

e.g. it should can split & display maximum 64 videos on one monitor, that is decoding capability.

e.g. it should can display videos by group.

e.g. it should can display videos by roaming.

e.g. it should can display videos by roaming.

e.g. it should can display multilayer videos over background.

Third, if the decoder accpet hdmi input, besides ip videos, mostly, it will request to display video from computer.

Fourth, simple operations:

e.g. If a keyboard can work with this decoder for precise operation on ptz by joystick.

e.g. if it can offer portable pad for operations.

can not list all points on decoder opitions, in a word, the decoder should offer easy and simple operation with user-friendly interface.