FFmpeg Learning-Player decoding process (pre-editing)

Player decoding process

1, Demux: Media files Midrange video data is compressed together, the single compression algorithm is different, so it is necessary to decode the audio and video data before decoding, the audio and video data will be separated

2, decoding,ffmpeg in the decoding process corresponding to the API function

FFmpeg in Demux This step is through

Avformat_open_input (): Read the header information of the file and do Demux, then can read the audio and video stream in the media file

Av_read_frame (): Reads and removes basic data streams from audio and video streams packet

Avcodec_decode_video2 (): Read packet, decode with appropriate API

FFmpeg Learning-Player decoding process (pre-editing)