Csdrhrt

I am saving frames to H264 format and I saved audio to aac format. Then I concatenate of these format to creating mp4 format using ffmpeg player in android but When I concatenate Audio and Video, audio getting back of video they aren't playing at synchronous mode,how can I played video and audio at syncronous mode? H264 video format is 6 second, audio format is 8 second When I concatenate of these getting 8 second and audio coming longer and occuring asyncronous.

Recording Audio to AAC format

    recorder = new MediaRecorder();



    recorder.setAudioSource(MediaRecorder.AudioSource.MIC);

    recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4); 

    recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);    

    recorder.setAudioEncodingBitRate(48000);//48000

    recorder.setAudioSamplingRate(720);//16000

    recorder.setOutputFile(path2);

    try {

        recorder.prepare();

    } catch (IOException e) {

        e.printStackTrace();

    }

    recorder.start();

Saving Video to H264 format

        MediaFormat mediaFormat = MediaFormat.createVideoFormat("video/avc",

                1280,

                720);

        mediaFormat.setInteger(MediaFormat.KEY_COLOR_FORMAT,

                MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420Planar);

        mediaFormat.setInteger(MediaFormat.KEY_BIT_RATE, 6000000);

        mediaFormat.setInteger(MediaFormat.KEY_FRAME_RATE, 720); //video second



        mediaFormat.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, 5);

        try {

            mMediaCodec = MediaCodec.createEncoderByType("video/avc");

        } catch (IOException e) {

            e.printStackTrace();

        }

        mMediaCodec.configure(mediaFormat,

                null,

                null,

                MediaCodec.CONFIGURE_FLAG_ENCODE);



        mMediaCodec.start();

Concatenate Video and Audio with using ffmpeg

String cmd = {"-i", h264_video_path, "-i", aac_audio_path, "-c", "copy", "-map","0:v:0","-map","1:a:0", outpath_mp4};



    try {

                    //FFMPEG execute command

                    executeCommand(cmd);

                } catch (FFmpegCommandAlreadyRunningException e) {

                    e.printStackTrace();

                }