Android MediaExtractor的使用
作者：互联网
我们知道多媒体文件当中包含很多流，比如视频流，音频流等。我们可以通过
MediaExtractor获取到相关的信息。下面是具体用法。
package com.yuanxuzhen.androidmedia.demux;
import android.media.MediaExtractor;
import android.media.MediaFormat;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import androidx.appcompat.app.AppCompatActivity;
import com.yuanxuzhen.androidmedia.DirUtil;
import com.yuanxuzhen.androidmedia.databinding.ActivityDemuxBinding;
import java.io.File;
import java.io.IOException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
public class DemuxActivity extends AppCompatActivity {
ActivityDemuxBinding mainBinding;
ExecutorService mExecutorService;
private String mediaPath;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mainBinding = ActivityDemuxBinding.inflate(getLayoutInflater());
setContentView(mainBinding.getRoot());
mExecutorService = Executors.newCachedThreadPool();
mediaPath = DirUtil.getCacheDir() + File.separator + "in.mp4";
mainBinding.print.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mExecutorService.execute(new Runnable() {
@Override
public void run() {
/*打印通道信息*/
// printMediaCount(mediaPath);
// int videoIndex = getTrackIndex("video", mediaPath);
// printLog("videoIndex="+videoIndex);
printVideoMeidaInfo(mediaPath);
printAudioMeidaInfo(mediaPath);
}
});
}
});
}
private void printLog(String msg){
Log.e("DemuxAcYuan", msg);
}
private void printMediaCount(String path){
try{
MediaExtractor extractor = new MediaExtractor();//实例一个MediaExtractor
extractor.setDataSource(path);
int count = extractor.getTrackCount();//获取轨道数量
printLog("printMediaInfo count="+count);
for (int i = 0; i < count; i++){
MediaFormat mediaFormat = extractor.getTrackFormat(i);
printLog(i+"编号通道格式 = "+mediaFormat.getString(MediaFormat.KEY_MIME));
}
}catch (Exception e){
e.printStackTrace();
}
}
private int getTrackIndex(String targetTrack, String path) {
MediaExtractor extractor = new MediaExtractor();//实例一个MediaExtractor
try {
extractor.setDataSource(path);//设置添加MP4文件路径
} catch (IOException e) {
e.printStackTrace();
}
int trackIndex = -1;
int count = extractor.getTrackCount();//获取轨道数量
for (int i = 0; i < count; i++) {
MediaFormat mediaFormat = extractor.getTrackFormat(i);
String currentTrack = mediaFormat.getString(MediaFormat.KEY_MIME);
if (currentTrack.startsWith(targetTrack)) {
trackIndex = i;
break;
}
}
return trackIndex;
}
private void printVideoMeidaInfo(String path){
int index = getTrackIndex("video", path);
if(index < 0){
return;
}
try{
MediaExtractor extractor = new MediaExtractor();//实例一个MediaExtractor
extractor.setDataSource(path);
MediaFormat mediaFormat = extractor.getTrackFormat(index);
VideoMediaInfo videoMediaInfo = new VideoMediaInfo();
videoMediaInfo.language = mediaFormat.getString(MediaFormat.KEY_LANGUAGE);//获取语言格式内容
videoMediaInfo.width = mediaFormat.getInteger(MediaFormat.KEY_WIDTH);
videoMediaInfo.height = mediaFormat.getInteger(MediaFormat.KEY_HEIGHT);
videoMediaInfo.durationTime = mediaFormat.getLong(MediaFormat.KEY_DURATION);
videoMediaInfo.maxByteCount = mediaFormat.getInteger(MediaFormat.KEY_MAX_INPUT_SIZE);//获取视频缓存输出的最大大小
try{
Integer bitRate = mediaFormat.getInteger(MediaFormat.KEY_BIT_RATE);//获取比特
}catch (Exception e){
e.printStackTrace();
}
try{
videoMediaInfo.colorFormat = mediaFormat.getInteger(MediaFormat.KEY_COLOR_FORMAT);//颜色格式
}catch (Exception e){
e.printStackTrace();
}
try{
videoMediaInfo.frameRate = mediaFormat.getInteger(MediaFormat.KEY_FRAME_RATE);//帧率
}catch (Exception e){
e.printStackTrace();
}
try{
videoMediaInfo. tileWidth = mediaFormat.getInteger(MediaFormat.KEY_TILE_WIDTH);//图块分辨率
}catch (Exception e){
e.printStackTrace();
}
try{
videoMediaInfo. tileHeight = mediaFormat.getInteger(MediaFormat.KEY_TILE_HEIGHT);//图块分辨率
}catch (Exception e){
e.printStackTrace();
}
try{
videoMediaInfo.gridRows = mediaFormat.getInteger(MediaFormat.KEY_GRID_ROWS);//网格行
}catch (Exception e){
e.printStackTrace();
}
try{
videoMediaInfo.gridColumns = mediaFormat.getInteger(MediaFormat.KEY_GRID_COLUMNS);//网格列
}catch (Exception e){
e.printStackTrace();
}
printLog("printVideoMeidaInfo " + videoMediaInfo);
}catch (Exception e){
e.printStackTrace();
}
}
private void printAudioMeidaInfo(String path){
int index = getTrackIndex("audio", path);
if(index < 0){
return;
}
try{
MediaExtractor extractor = new MediaExtractor();//实例一个MediaExtractor
extractor.setDataSource(path);
MediaFormat mediaFormat = extractor.getTrackFormat(index);
AudioMediaInfo mediaINfo = new AudioMediaInfo();
try{
mediaINfo.bitRate = mediaFormat.getInteger(MediaFormat.KEY_BIT_RATE);//获取比特
}catch (Exception e){
e.printStackTrace();
}
try{
// mediaINfo.pcmEncoding = mediaFormat.getInteger(MediaFormat.KEY_PCM_ENCODING);//PCM-编码 模拟信号编码
mediaINfo.sampleRate = mediaFormat.getInteger(MediaFormat.KEY_SAMPLE_RATE);
mediaINfo.channelCount = mediaFormat.getInteger(MediaFormat.KEY_CHANNEL_COUNT);
}catch (Exception e){
e.printStackTrace();
}
try{
mediaINfo.isAdts = mediaFormat.getInteger(MediaFormat.KEY_IS_ADTS);
}catch (Exception e){
e.printStackTrace();
}
try{
mediaINfo.keyChannelMask = mediaFormat.getInteger(MediaFormat.KEY_CHANNEL_MASK);//图块分辨率
}catch (Exception e){
e.printStackTrace();
}
try{
mediaINfo.aacProfile = mediaFormat.getInteger(MediaFormat.KEY_AAC_PROFILE);//图块分辨率
}catch (Exception e){
e.printStackTrace();
}
printLog("printAudioMeidaInfo " + mediaINfo);
}catch (Exception e){
e.printStackTrace();
}
}
}package com.yuanxuzhen.androidmedia.demux;
public class VideoMediaInfo {
public String language; //语言
public int width; //视频宽
public int height; //视频高
public long durationTime;//视频时间
public int maxByteCount;
public int colorFormat;
public int frameRate;
public int tileWidth;
public int tileHeight;
public int gridRows;
public int gridColumns;
@Override
public String toString() {
return "VideoMediaInfo{" +
"language='" + language + '\'' +
", width=" + width +
", height=" + height +
", durationTime=" + durationTime +
", maxByteCount=" + maxByteCount +
", colorFormat=" + colorFormat +
", frameRate=" + frameRate +
", tileWidth=" + tileWidth +
", tileHeight=" + tileHeight +
", gridRows=" + gridRows +
", gridColumns=" + gridColumns +
'}';
}
}
package com.yuanxuzhen.androidmedia.demux;
public class AudioMediaInfo {
int bitRate;
int pcmEncoding;
int sampleRate;
int channelCount;
int isAdts;
int keyChannelMask;
int aacProfile;
@Override
public String toString() {
return "AudioMediaInfo{" +
"bitRate=" + bitRate +
", pcmEncoding=" + pcmEncoding +
", sampleRate=" + sampleRate +
", channelCount=" + channelCount +
", isAdts=" + isAdts +
", keyChannelMask=" + keyChannelMask +
", aacProfile=" + aacProfile +
'}';
}
}
gitee地址
https://gitee.com/creat151/android-media.git
标签：MediaExtractor,MediaFormat,int,getInteger,KEY,mediaFormat,使用,Android,public 来源： https://blog.csdn.net/qq_15255121/article/details/119117106