) _android_log_print(ANDROID_LOG_INFO,"FFmpegAudioPlayer",FORMAT,#_VA_ARGS_) Write audio decoding code in native-lib.cpp #include Introduce the so library in MainActivity.kt class MainActivity : AppCompatActivity() /out.pcm"Įxternal fun decodeAudio(src: String, out: String)
While (av_read_frame(fmtCtx, packet) >= 0)；//分配AVPacket内存，循环读入packetĪvcodec_decode_audio4() //将packet解码成AVFrame The general decoding process is as follows av_register_all() //注册所有codec和muxers, demuxers，protocolsĪvformat_alloc_context() //AVFormatContext初始化Īvcodec_find_decoder() //根据audio_stream_index获取解码器 Let's start to use the FFmpeg library to implement audio decoding through code. Therefore, we can easily implement format conversion with FFmpeg without knowing the relevant protocols of various formats. Through the encoder, FFmpeg can encode the frame into audio and video files of different formats. The audio and video are decoded into AVFrames through the decoder, and each frame contains the pcm information of the audio or the yuv information of the video.
It can decode any audio formats (mp3, wav, aac, ogg, etc.) and video formats (mp4, avi, rm, rmvb, mov, etc.) on the market.
The first powerful aspect of FFmpeg is its codec capabilities. Introduction FFmpeg audio player (2)-Compile dynamic libraryįFmpeg audio player (3)-Add FFmpeg to AndroidįFmpeg audio player (4)-Decode mp3 into pcmįFmpeg audio playback Device (5) - single input filter (volume, atempo)įFmpeg audio player (6) - multiple input filter (amix)įFmpeg audio player (7) - use OpenSLES to play audioįFmpeg audio player (8) - create FFmpeg playback FFmpeg Audio Player
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