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解决Android MediaRecorder录制视频过短问题

2019年07月24日  | 移动技术网移动技术  | 我要评论

具体表现：

  调用mediarecorder的start()与stop()间隔不能小于1秒(有时候大于1秒也崩)，否则必崩。

 错误信息：

java.lang.runtimeexception: stop failed.
  at android.media.mediarecorder.stop(native method)

 解决办法：

  在stop以前调用setonerrorlistener(null);就行了！

 相关代码：

 /** 开始录制 */
  @override
  public mediapart startrecord() {
    if (mmediaobject != null && msurfaceholder != null && !mrecording) {
      mediapart result = mmediaobject.buildmediapart(mcameraid, ".mp4");

      try {
        if (mmediarecorder == null) {
          mmediarecorder = new mediarecorder();
          mmediarecorder.setonerrorlistener(this);
        } else {
          mmediarecorder.reset();
        }

        // step 1: unlock and set camera to mediarecorder
        camera.unlock();
        mmediarecorder.setcamera(camera);
        mmediarecorder.setpreviewdisplay(msurfaceholder.getsurface());

        // step 2: set sources
        mmediarecorder.setvideosource(mediarecorder.videosource.camera);//before setoutputformat()
        mmediarecorder.setaudiosource(mediarecorder.audiosource.mic);//before setoutputformat()

        mmediarecorder.setoutputformat(mediarecorder.outputformat.mpeg_4);

        //设置视频输出的格式和编码
        camcorderprofile mprofile = camcorderprofile.get(camcorderprofile.quality_480p);
        //        mmediarecorder.setprofile(mprofile);
        mmediarecorder.setvideosize(640, 480);//after setvideosource(),after setoutformat()
        mmediarecorder.setaudioencodingbitrate(44100);
        if (mprofile.videobitrate > 2 * 1024 * 1024)
          mmediarecorder.setvideoencodingbitrate(2 * 1024 * 1024);
        else
          mmediarecorder.setvideoencodingbitrate(mprofile.videobitrate);
        mmediarecorder.setvideoframerate(mprofile.videoframerate);//after setvideosource(),after setoutformat()

        mmediarecorder.setaudioencoder(mediarecorder.audioencoder.aac);//after setoutputformat()
        mmediarecorder.setvideoencoder(mediarecorder.videoencoder.h264);//after setoutputformat()

        //mmediarecorder.setvideoencodingbitrate(800);

        // step 4: set output file
        mmediarecorder.setoutputfile(result.mediapath);

        // step 5: set the preview output
        //        mmediarecorder.setorientationhint(90);//加了htc的手机会有问题

        log.e("yixia", "outputfile:" + result.mediapath);

        mmediarecorder.prepare();
        mmediarecorder.start();
        mrecording = true;
        return result;
      } catch (illegalstateexception e) {
        e.printstacktrace();
        log.e("yixia", "startrecord", e);
      } catch (ioexception e) {
        e.printstacktrace();
        log.e("yixia", "startrecord", e);
      } catch (exception e) {
        e.printstacktrace();
        log.e("yixia", "startrecord", e);
      }
    }
    return null;
  }

  /** 停止录制 */
  @override
  public void stoprecord() {
    long endtime = system.currenttimemillis();
    if (mmediarecorder != null) {
      //设置后不会崩
      mmediarecorder.setonerrorlistener(null);
      mmediarecorder.setpreviewdisplay(null);
      try {
        mmediarecorder.stop();
      } catch (illegalstateexception e) {
        log.w("yixia", "stoprecord", e);
      } catch (runtimeexception e) {
        log.w("yixia", "stoprecord", e);
      } catch (exception e) {
        log.w("yixia", "stoprecord", e);
      }
    }

    if (camera != null) {
      try {
        camera.lock();
      } catch (runtimeexception e) {
        log.e("yixia", "stoprecord", e);
      }
    }

    mrecording = false;
  }

  /** 释放资源 */
  @override
  public void release() {
    super.release();
    if (mmediarecorder != null) {
      mmediarecorder.setonerrorlistener(null);
      try {
        mmediarecorder.release();
      } catch (illegalstateexception e) {
        log.w("yixia", "stoprecord", e);
      } catch (exception e) {
        log.w("yixia", "stoprecord", e);
      }
    }
    mmediarecorder = null;
  }

  @override
  public void onerror(mediarecorder mr, int what, int extra) {
    try {
      if (mr != null)
        mr.reset();
    } catch (illegalstateexception e) {
      log.w("yixia", "stoprecord", e);
    } catch (exception e) {
      log.w("yixia", "stoprecord", e);
    }
    if (monerrorlistener != null)
      monerrorlistener.onvideoerror(what, extra);
  }

以上就是对android mediarecorder 资料整理，后续继续补充，有需要的朋友可以参考下。

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