Chapter 4-android MediaCodec: coding and decoding logic awareness-androidmediacodec

Chapter 4-android MediaCodec: coding and decoding logic awareness-androidmediacodec

Suppose we need to make a media file synthesizer. The function is to extract some fragments from multiple media files and then combine these fragments into a new media file, then we can use mediacodec to help us do something.

The general logic of MediaCodec encoding and decoding is as follows:

The Calling logic of the main functions is as follows:

As shown in the figure, we first use the decoder to extract multiple outputBuffer data and then use the encoder to put them in a file. If you want to add subtitles, special effects, and so on, you will first get outputBuffer, then process it, and finally feed the processed data to the encoder to generate the final file.