如何为流媒体执行硬件加速的H.264编码和解码？

I am able to get the RGBA frame data from the camera, and I want to encode it in H.264 format. I've used FFmpeg to encode and decode H.264 video, but at a frame size of 640x480 it's too slow for my needs.I am able to get the RGBA frame data from the c