1、应用场景
在实际开发过程中,推流和拉流不想生成本地文件,以节省服务器对磁盘的要求。网上大量文档都是生成本地文件的形式来做操作。因此,在查看源码的基础之上,参考网上文档,码了一个工具类。
2、具体应用类
本类只是流到流不产生具体的本地文件,如有需要可以网上搜索相关文档,很多。
代码:
import org.bytedeco.javacv.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
/**
* @author hilbert.xu
*/
public class Convert {
private static final Logger log = LoggerFactory.getLogger(Convert.class);
private static ByteArrayOutputStream convert2OutputStream(InputStream inputStream) {
Frame audioSamples = null;
ByteArrayOutputStream swapStream = null;
// 音频录制(输出地址,音频通道)
FFmpegFrameRecorder recorder = null;
FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(inputStream);
// 开启抓取器
if (start(grabber)) {
swapStream = new ByteArrayOutputStream();
recorder = new FFmpegFrameRecorder(swapStream, 1);
recorder.setAudioOption("crf", "0");
recorder.setAudioBitrate(16);
recorder.setAudioChannels(1);
recorder.setSampleRate(16000);
recorder.setAudioQuality(0);
recorder.setFormat("wav"); // 具体转化音视频类型
recorder.setAudioOption("aq", "10");
// 开启录制器
if (start(recorder)) {
try {
// 抓取音频
while ((audioSamples = grabber.grab()) != null) {
recorder.setTimestamp(grabber.getTimestamp());
recorder.record(audioSamples);
}
} catch (org.bytedeco.javacv.FrameGrabber.Exception e1) {
log.error("抓取失败");
} catch (Exception e) {
log.error("录制失败");
}
stop(grabber);
stop(recorder);
}
}
return swapStream;
}
public static String convert2String(InputStream inputStream) {
ByteArrayOutputStream outputStream = convert2OutputStream(inputStream);
return outputStream.toString();
}
public static byte[] convert2ByteArray(InputStream inputStream) {
ByteArrayOutputStream outputStream = convert2OutputStream(inputStream);
return outputStream.toByteArray();
}
private static boolean start(FrameGrabber grabber) {
try {
grabber.start();
return true;
} catch (org.bytedeco.javacv.FrameGrabber.Exception e2) {
try {
log.error("首次打开抓取器失败,准备重启抓取器...");
grabber.restart();
return true;
} catch (org.bytedeco.javacv.FrameGrabber.Exception e) {
try {
log.error("重启抓取器失败,正在关闭抓取器...");
grabber.stop();
} catch (org.bytedeco.javacv.FrameGrabber.Exception e1) {
log.error("停止抓取器失败!");
}
}
}
return false;
}
private static boolean start(FrameRecorder recorder) {
try {
recorder.start();
return true;
} catch (Exception e2) {
try {
log.error("首次打开录制器失败!准备重启录制器...");
recorder.stop();
recorder.start();
return true;
} catch (Exception e) {
try {
log.error("重启录制器失败!正在停止录制器...");
recorder.stop();
} catch (Exception e1) {
log.error("关闭录制器失败!");
}
}
}
return false;
}
private static boolean stop(FrameGrabber grabber) {
try {
grabber.flush();
grabber.stop();
return true;
} catch (org.bytedeco.javacv.FrameGrabber.Exception e) {
return false;
} finally {
try {
grabber.stop();
} catch (org.bytedeco.javacv.FrameGrabber.Exception e) {
log.error("关闭抓取器失败");
}
}
}
private static boolean stop(FrameRecorder recorder) {
try {
recorder.stop();
recorder.release();
return true;
} catch (Exception e) {
return false;
} finally {
try {
recorder.stop();
} catch (Exception e) {
}
}
}
}
3、 总结
博主查了大量文档也未解决自己的需求,因此自己码了此类,希望对有需要的童鞋有所帮助。欢迎大家学习讨论。
另:以示记录,同技术死磕到底。