从ffmpeg中提取的h.264解码器，网上从其他地方也不容易找的到，对于想理解H264标准，优化H264解码器，及开发H264相关应用的人，会有很大帮助。,Ffmpeg extracted from the h.264 codec, on-line from other places is not easy to find that the standard for H264 would like to understand and optimize the H264 decoder, and