MediaMuxer合成mp4 Fatal signal 6 (SIGABRT), code -1 (SI_QUEUE)错误解决

在使用MediaMuxer合成mp4,送入音视频数据时报 Fatal signal 6 (SIGABRT), code -1 (SI_QUEUE)

经过排查，原来是aac编码时，输出的第一包数据只有2个字节，且codecInfo的pts为0，因为该数据

是音频编码参数相关的东西，在mediaMuxer writeSampleData时，不需要写入该数据，写入了的话

就会报这个错误

在Android中，简单的说可以使用 MediaMuxer 来封装编码后的视频流和音频流到mp4容器中,MediaMuxer从api18开始提供，可以封装编码后的视频流和音频流到视频文件中。目前MediaMuxer支持的文件输出格式包括MP4，webm和3gp：

构造函数

方法

MediaMuxer基本使用我们学完了，主要是结合MediaCodec一起来使用，后面我们会在来学习MediaCodec来一起使用，来完成编码录制功能。

最近开始学习Android下的封装和解封装技术，熟悉MediaExtractor和MediaMuxer的使用。

1、MainActivity.java文件：

packagecom.example.tongjiangsong.mediaextractmuxer

importandroid.support.v7.app.AppCompatActivity

importandroid.os.Bundle

importandroid.view.View

importandroid.widget.Button

publicclassMainActivityextendsAppCompatActivity{

privateButton button

@Override

protectedvoidonCreate(Bundle savedInstanceState){

super.onCreate(savedInstanceState)

        setContentView(R.layout.activity_main)

        button = (Button)findViewById(R.id.button)

button.setOnClickListener(newView.OnClickListener() {

@Override

publicvoidonClick(View v){

newExtractorMuxerThread().start()

            }

        })

    }

}

2、ExtractorMuxerThread.java文件：

packagecom.example.tongjiangsong.mediaextractmuxer

importandroid.media.MediaCodec

importandroid.media.MediaExtractor

importandroid.media.MediaFormat

importandroid.media.MediaMuxer

importandroid.os.Environment

importandroid.widget.Toast

importjava.io.IOException

importjava.nio.ByteBuffer

importandroid.view.View

publicclassExtractorMuxerThreadextendsThread{

@Override

publicvoidrun(){

super.run()

        mixer()

    }

publicvoidmixer(){

MediaExtractor videoExtractor =null

MediaExtractor audioExtractor =null

MediaMuxer mixMediaMuxer =null

String outputVideoFilePath = Environment.getExternalStorageDirectory().getAbsolutePath()+"/people.mp4"

String outputAudioFilePath = Environment.getExternalStorageDirectory().getAbsolutePath()+"/qishi.aac"

String outputFilePath = Environment.getExternalStorageDirectory().getAbsolutePath()+"/mixer.mp4"

try{

videoExtractor =newMediaExtractor()

            videoExtractor.setDataSource(outputVideoFilePath)

intvideoIndex = -1

MediaFormat videoTrackFormat =null

inttrackCount = videoExtractor.getTrackCount()

for(inti =0i <trackCounti++) {

                videoTrackFormat = videoExtractor.getTrackFormat(i)

if(videoTrackFormat.getString(MediaFormat.KEY_MIME).startsWith("video/")) {

                    videoIndex = i

break

                }

            }

audioExtractor =newMediaExtractor()

            audioExtractor.setDataSource(outputAudioFilePath)

intaudioIndex = -1

MediaFormat audioTrackFormat =null

            trackCount = audioExtractor.getTrackCount()

for(inti =0i <trackCounti++) {

                audioTrackFormat = audioExtractor.getTrackFormat(i)

if(audioTrackFormat.getString(MediaFormat.KEY_MIME).startsWith("audio/")) {

                    audioIndex = i

break

                }

            }

            videoExtractor.selectTrack(videoIndex)

            audioExtractor.selectTrack(audioIndex)

MediaCodec.BufferInfo videoBufferInfo =newMediaCodec.BufferInfo()

MediaCodec.BufferInfo audioBufferInfo =newMediaCodec.BufferInfo()

mixMediaMuxer =newMediaMuxer(outputFilePath, MediaMuxer.OutputFormat.MUXER_OUTPUT_MPEG_4)

intvideoTrackIndex = mixMediaMuxer.addTrack(videoTrackFormat)

intaudioTrackIndex = mixMediaMuxer.addTrack(audioTrackFormat)

            mixMediaMuxer.start()

ByteBuffer byteBuffer = ByteBuffer.allocate(1024*1024)

longvideotime

longaudiotime

            {

videoExtractor.readSampleData(byteBuffer,0)

if(videoExtractor.getSampleFlags() == MediaExtractor.SAMPLE_FLAG_SYNC) {

                    videoExtractor.advance()

                }

videoExtractor.readSampleData(byteBuffer,0)

longsampleTime = videoExtractor.getSampleTime()

                videoExtractor.advance()

videoExtractor.readSampleData(byteBuffer,0)

longsampleTime1 = videoExtractor.getSampleTime()

                videoExtractor.advance()

                videotime = Math.abs(sampleTime - sampleTime1)

            }

            {

audioExtractor.readSampleData(byteBuffer,0)

if(audioExtractor.getSampleFlags() == MediaExtractor.SAMPLE_FLAG_SYNC) {

                    audioExtractor.advance()

                }

audioExtractor.readSampleData(byteBuffer,0)

longsampleTime = audioExtractor.getSampleTime()

                audioExtractor.advance()

audioExtractor.readSampleData(byteBuffer,0)

longsampleTime1 = audioExtractor.getSampleTime()

                audioExtractor.advance()

                audiotime = Math.abs(sampleTime - sampleTime1)

            }

            videoExtractor.unselectTrack(videoIndex)

            videoExtractor.selectTrack(videoIndex)

while(true) {

intdata = videoExtractor.readSampleData(byteBuffer,0)

if(data <0) {

break

                }

                videoBufferInfo.size = data

                videoBufferInfo.presentationTimeUs += videotime

videoBufferInfo.offset =0

                videoBufferInfo.flags = videoExtractor.getSampleFlags()

                mixMediaMuxer.writeSampleData(videoTrackIndex, byteBuffer, videoBufferInfo)

                videoExtractor.advance()

            }

while(true) {

intdata = audioExtractor.readSampleData(byteBuffer,0)

if(data <0) {

break

                }

                audioBufferInfo.size = data

                audioBufferInfo.presentationTimeUs += audiotime

audioBufferInfo.offset =0

                audioBufferInfo.flags = audioExtractor.getSampleFlags()

                mixMediaMuxer.writeSampleData(audioTrackIndex, byteBuffer, audioBufferInfo)

                audioExtractor.advance()

            }

}catch(IOException e) {

            e.printStackTrace()

}finally{

if(mixMediaMuxer !=null) {

                mixMediaMuxer.stop()

                mixMediaMuxer.release()

            }

if(videoExtractor !=null){

                videoExtractor.release()

            }

if(audioExtractor !=null){

                audioExtractor.release()

            }

        }

    }

}

3、activity_main.xml文件：

xmlns:app="http://schemas.android.com/apk/res-auto"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context=".MainActivity">

    <Button

android:id="@+id/button"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="解封装和封装!"

app:layout_constraintBottom_toBottomOf="parent"

app:layout_constraintLeft_toLeftOf="parent"

app:layout_constraintRight_toRightOf="parent"

app:layout_constraintTop_toTopOf="parent"/>

</android.support.constraint.ConstraintLayout>

4、权限：

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

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