android底层media操作概况

套装

android中使用更底层的api操作media，该套装原先用于组装MediaPlayer,目前开放给开发者，处理media,你值得拥有。

MediaCodec,
MediaExtractor,
MediaSync,
MediaMuxer,
MediaCrypto,
MediaDrm,
Image,
Surface,
AudioTrack

MediaCodec

added in api 16

对 audio 和 video 进行编码，解码，混合。(decode encode compress)

MediaExtractor

added in api 16

对音视频分路，通过media容器文件解析，转化为可以方便处理的packet

MediaMuxer

added in api 18

与MediaExtractor 相反，将media packet输出到media容器内。
目前仅支持mp4 和 webm? 输出格式，仅支持一个 audio track 一个video track

Currently supports mp4 or webm file as the output and at most one audio and/or one video elementary stream. MediaMuxer does not support muxing B-frames.

MediaCrypto

added in api 16

decode encrypted media data

MediaDrm

added in api 18

obtain keys for decrypting protected media streams