omx 使用总结

参考资源：http://developer.android.com/reference/android/media/MediaCodec.html

CSD：codec specific data

Many decoders require the actual
compressed data stream to be preceded by "codec specific data", i.e. setup data used to initialize the codec such as PPS/SPS in the case of AVC video or code tables in the case of vorbis audio. The class

MediaExtractor

provides
codec specific data as part of the returned track format in entries named "csd-0", "csd-1" ...