Without getting too much into detail, the OpenMAX driver is a standard API stitting above the RPis VCHIQ kernel driver, which communicates with the VideoCore IV GPU. And that’s where OpenMAX IL API comes into play. the common used libx264 codec) and its high demand of CPU Power is not a proper option for the RPi, it is almost a obligation to use the RPis GPU to hardware accelerate the H.264 encoding process. Perhaps that might be appropiate for a full size tower computer with capable enough hardware to encode H.264 on the fly, but we are talking about a Raspberry Pi here. It’s easy now to get in a rush and simply install ffmpeg/libav from the package sources and call it a day. Right now, just one of the two pillars (namely nginx and ffmpeg) are ready to support the roof (the webcam streams). Step 5 – Installing ffmpeg with OpenMAX H.264 GPU acceleration module
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