We have a situation where we have a large number of incoming HD video streams which we would like to monitor in a way similar to this wall of monitors each showing 16 channels.
This can probably be done by having the channels downscaled and put next to each other by e.g. VLC on a suitably powerful PC but at the expense of a lot of CPU-power. I would like to see if a Raspberry can help for example by being able to display 2x2 or similar or just render the bitstream into a HDMI output. We may look into an off-the-shelf solution for additional combination of multiple HDMI inputs into a single HDMI output. For this example this could be four raspberries each rendering a 2x2 corner, which is then combined by a single 4-input device to a full 4x4 image.
Can the GPU in the Raspberry handle that given suitable omxplayer options? (I solved the "capture and buffer http stream" problem earlier)