How many simultaneous h.264 decoded streams can the S905X support?

I am interested in decoding multiple h.264 streams simultaneously. The S905X chip specs are here. It states that the AVE-10 GPU supports h.264/h.265 decoding is supported up to 4kx2k@60fps. However, can this be split into multiple input streams that get decoded separately? For a RPi 3b+, I can increase the GPU allocated memory and decode up to 8x 1080p streams simultaneously with multiple FFMPEG processes.
Anyone have comparisons for the S905X?