FFMpeg優化策略：
１．CodecContext Optimization to Decode H264
https://ffmpeg.org/pipermail/libav-user/2013-February/003796.html
２．使用arm的組合語言neon來加速FFMpeg的處理：
https://trac.ffmpeg.org/attachment/ticket/1309/build-arm-neon.sh
ＳＤＬ： １．An ffmpeg and SDL Tutorial How to Write a Video Player in Less Than 1000 Lines http://dranger.com/ffmpeg/tutorial01.html （介紹的非常詳細，應該很有用） ２．Using OpenGL With SDL https://www.libsdl.org/release/SDL-1.2.15/docs/html/guidevideoopengl.html