安卓系统中自动对焦后的视频录制问题[英] Problem with Video recording after auto focus in Android

问题描述

Im trying to build an app which tries to auto focus the camera before starting the video recording. Directly using MediaRecorder does not auto focus the camera. For that i am Using Camera and using the callback I can autofocus it. But providing this instance to the MediaRecorder gives me a lot of issues. Following is the code im using for recording

public boolean startRecording()
{
    try
    {
        mCamera.unlock();

        mediaRecorder = new MediaRecorder();
        mediaRecorder.setCamera(mCamera);

        mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);

        CamcorderProfile profile = CamcorderProfile
                .get(CamcorderProfile.QUALITY_LOW);
        mediaRecorder.setProfile(profile);

        mediaRecorder.setMaxDuration(maxDurationInMs);

        File file = new File(outputFile);
        if (file.exists())
            file.delete();
        file = new File(outputFile);

        try
        {
            file.createNewFile();
        }
        catch (IOException e1)
        {
            // TODO Auto-generated catch block
            e1.printStackTrace();
            Log.e("Deepak", "*** first catch ***");
        }


        mediaRecorder.setOutputFile(outputFile);
        mediaRecorder.setPreviewDisplay(mHolder.getSurface());

        mediaRecorder.setMaxFileSize(maxFileSizeInBytes);

        mediaRecorder.prepare();
        mediaRecorder.start();

        return true;
    }
    catch (IllegalStateException e)
    {
        Log.e(TAG, e.getMessage());
        e.printStackTrace();
        return false;
    }
    catch (IOException e)
    {
        Log.e(TAG, e.getMessage());
        e.printStackTrace();
        return false;
    }
}

The Camera attributes are as follows:

Camera.Parameters parameters = mCamera.getParameters();
    List<Size> sizeList = parameters.getSupportedPreviewSizes();
    parameters.setPreviewFormat(ImageFormat.JPEG);
    parameters
            .setPreviewSize(sizeList.get(0).width, sizeList.get(0).height);
    mCamera.setParameters(parameters);
    mCamera.startPreview();

All this is giving me the following error message:

    11-22 16:51:25.314: DEBUG/Preview(4052): !!!!!!!!!!111Starting recording!!!!!!!!!!!!!!
11-22 16:51:25.334: ERROR/audio_input(59): unsupported parameter: x-pvmf/media-input-node/cap-config-interface;valtype=key_specific_value
11-22 16:51:25.334: ERROR/audio_input(59): VerifyAndSetParameter failed
11-22 16:51:25.334: ERROR/CameraInput(59): Unsupported parameter(x-pvmf/media-input-node/cap-config-interface;valtype=key_specific_value)
11-22 16:51:25.334: ERROR/CameraInput(59): VerifiyAndSetParameter failed on parameter #0
11-22 16:51:25.344: DEBUG/AuthorDriver(59): setParamVideoEncodingBitrate() 256000
11-22 16:51:25.384: INFO/MediaRecorderJNI(4052): prepare: surface=0x222968 (id=1)
11-22 16:51:25.394: ERROR/PVOMXEncNode(59): PVMFOMXEncNode-Video_M4V::DoPrepare(): Got Component OMX.qcom.video.encoder.mpeg4 handle 
11-22 16:51:25.394: WARN/CameraInput(59): refCount 0
11-22 16:51:25.394: ERROR/VENC_ENC(59): VENC_ERROR update_param_port_def::1643 Frame rate is for input port (refer to OMX IL spec)
11-22 16:51:25.394: ERROR/VENC_ENC(59): VENC_ERROR get_parameter::952 unsupported index 0x700000b
11-22 16:51:25.394: ERROR/VENC_ENC(59): VENC_ERROR set_parameter::2720 unsupported index 0x700000b
11-22 16:51:25.394: ERROR/VENC_ENC(59): VENC_ERROR translate_profile::1015 unsupported profile
11-22 16:51:25.394: ERROR/VENC_ENC(59): Bitrate 256000
11-22 16:51:25.394: ERROR/VENC_ENC(59): VENC_ERROR get_parameter::952 unsupported index 0x6000005
11-22 16:51:25.394: ERROR/VENC_ENC(59): VENC_ERROR set_parameter::2720 unsupported index 0x6000005
11-22 16:51:25.394: ERROR/PVOMXEncNode(59): PVMFOMXEncNode-Audio_AMRNB::DoPrepare(): Got Component OMX.PV.amrencnb handle 
11-22 16:51:25.394: DEBUG/CameraInput(59): Intended mFrameWidth=176, mFrameHeight=144 
11-22 16:51:25.404: DEBUG/CameraInput(59): Actual mFrameWidth=176, mFrameHeight=144 
11-22 16:51:25.404: ERROR/VENC_ENC(59): VENC_ERROR ven_translate_config::428 Invalid mp4 configuration 
11-22 16:51:25.424: INFO/AudioHardwareQSD(59): Routing audio to Speakerphone
11-22 16:51:25.424: DEBUG/AudioHardwareQSD(59): Switching audio device to 
11-22 16:51:25.424: DEBUG/AudioHardwareQSD(59): Speakerphone
11-22 16:51:25.454: ERROR/CameraInput(59): Recording is not ready (iPeer 0x3bc14 iState 2 iWriteState 1 iClockState 0), frame dropped
11-22 16:51:25.494: ERROR/CameraInput(59): Recording is not ready (iPeer 0x3bc14 iState 2 iWriteState 1 iClockState 0), frame dropped
11-22 16:51:25.534: ERROR/CameraInput(59): Recording is not ready (iPeer 0x3bc14 iState 2 iWriteState 1 iClockState 0), frame dropped
11-22 16:51:25.554: INFO/AudioHardwareQSD(59): AudioHardware PCM record is going to standby.
11-22 16:51:25.554: INFO/AudioHardwareQSD(59): Routing audio to Speakerphone
11-22 16:51:25.564: INFO/AudioHardwareQSD(59): do input routing device 800000
11-22 16:51:25.564: INFO/AudioHardwareQSD(59): Routing audio to Speakerphone with back mic
11-22 16:51:25.564: ERROR/CameraInput(59): Recording is not ready (iPeer 0x3bc14 iState 2 iWriteState 1 iClockState 0), frame dropped
11-22 16:51:25.574: WARN/AudioFlinger(59): write blocked for 143 msecs, 52 delayed writes, thread 0xd7a8
11-22 16:51:25.604: ERROR/CameraInput(59): Recording is not ready (iPeer 0x3bc14 iState 2 iWriteState 1 iClockState 0), frame dropped
11-22 16:51:25.644: ERROR/CameraInput(59): Recording is not ready (iPeer 0x3bc14 iState 2 iWriteState 1 iClockState 0), frame dropped
11-22 16:51:25.684: ERROR/CameraInput(59): Recording is not ready (iPeer 0x3bc14 iState 2 iWriteState 1 iClockState 0), frame dropped
11-22 16:51:25.754: DEBUG/AudioHardwareQSD(59): Switching audio device to 
11-22 16:51:25.754: DEBUG/AudioHardwareQSD(59): Speakerphone
11-22 16:51:25.764: ERROR/CameraInput(59): Recording is not ready (iPeer 0x3bc14 iState 2 iWriteState 1 iClockState 0), frame dropped
11-22 16:51:25.814: ERROR/CameraInput(59): Recording is not ready (iPeer 0x3bc14 iState 2 iWriteState 1 iClockState 0), frame dropped
11-22 16:51:25.844: ERROR/CameraInput(59): Recording is not ready (iPeer 0x3bc14 iState 2 iWriteState 1 iClockState 0), frame dropped
11-22 16:51:25.884: ERROR/CameraInput(59): Recording is not ready (iPeer 0x3bc14 iState 2 iWriteState 1 iClockState 0), frame dropped
11-22 16:51:25.924: ERROR/CameraInput(59): Recording is not ready (iPeer 0x3bc14 iState 2 iWriteState 1 iClockState 0), frame dropped
11-22 16:51:25.964: ERROR/CameraInput(59): Recording is not ready (iPeer 0x3bc14 iState 2 iWriteState 1 iClockState 0), frame dropped
11-22 16:51:26.004: ERROR/CameraInput(59): Recording is not ready (iPeer 0x3bc14 iState 2 iWriteState 1 iClockState 0), frame dropped
11-22 16:51:26.044: ERROR/CameraInput(59): Recording is not ready (iPeer 0x3bc14 iState 2 iWriteState 1 iClockState 0), frame dropped
11-22 16:51:28.824: INFO/AudioHardwareQSD(59): AudioHardware pcm playback is going to standby.
11-22 16:51:31.324: DEBUG/Preview(4052): !!!!!!!!!!Stoping recording!!!!!!!!!!!!!!

This creates a file on the specified location which is totally obscured, just a bunch of green horizontal lines.

All permission are placed. Using Android 2.2. Tried the exact code as this but still got similar VENC_ERROR

推荐答案

You need to stop the preview prior to unlocking the camera

mCamera.stopPreview();

mCamera.unlock();