avcodec_decode_audio4 / avcodec_decode_video2 are deprecated

[morphogencc]

These decoding functions are deprecated in the latest version of ffmpeg; they've been replaced by av_send_packet() and av_receive_packet(). I'm working on figuring out how to integrate the new ones, but someone watching here may figure it out faster.

New Video Decoding Example

New Audio Decoding Example