$ git submodule init
$ ./FFmpeg-iOS-build-script/build-ffmpeg.sh

###2016.09.03

• add MediaData protocol
• add VideoData: MediaData
• add AudioData: MediaData
• reduce memory usage

###2016.09.02

• pull out SDL from Player.swift and doing update video on ViewController.swift
• resolve thread dead races
• resolve memory leaks
• reduce memory usage

###2016.09.01

• use Accelerate for copy audio stream
• stop using AVFilter
• AVAudioEngine playing with Float Planar audio format

###add SwiftPlayer project

• Using AVAudioEngine, and exclude SDL audio
• syncing with CADisplayLink, DispatchQueue, DispatchSemaphore
• No more referencing ffmpeg tutorials. It is too old, and never working well.

###TODO

• add seeking functions

###olds

• tutorial1
• export from video to image files
• tutorial2
• play video with SDL
• decoding with avfilter

swift only coding is not working now.

• crashing from avfiltercontext type casting problem
• some macros cannot bridging to swift

SDL2.0 + ffmpeg 3.1.1 + swift is different from olds

• using AVFilter instead of SWScale
• using SDL_Texture, SDL_Renderer, SDL_Window instead of SDL_Overlay, SDL_Surface
• using avcodec_send_packet, avcodec_receive_frame instead of avcodec_decode_video2, avcodec_decode_audio4

now working on tutorial4