- android - RelativeLayout 背景可绘制重叠内容
- android - 如何链接 cpufeatures lib 以获取 native android 库?
- java - OnItemClickListener 不起作用,但 OnLongItemClickListener 在自定义 ListView 中起作用
- java - Android 文件转字符串
我有一个解决方案,我使用 Media Foundation 的 h264 编码器对来自网络摄像头的视频 (YUY2) 样本进行编码。然后我通过 TCP 连接将它发送到另一个应用程序,该应用程序使用 Media Foundation 的 h264 解码器将流解码回 YUY2 格式。解码后,视频样本/图像使用 DirectX 呈现在屏幕上。
问题在于,在关键帧之间,视频图像会出现越来越多的伪像。收到关键帧时,伪影消失。
我将 TCP 连接排除在范围之外,并在编码后立即进行解码,但仍然有工件困扰着我。
这是从网络摄像头接收样本的回调方法:
//-------------------------------------------------------------------
// OnReadSample
//
// Called when the IMFMediaSource::ReadSample method completes.
//-------------------------------------------------------------------
HRESULT CPreview::OnReadSample(
HRESULT hrStatus,
DWORD /* dwStreamIndex */,
DWORD dwStreamFlags,
LONGLONG llTimestamp,
IMFSample *pSample // Can be NULL
)
{
HRESULT hr = S_OK;
IMFMediaBuffer *pBuffer = NULL;
EnterCriticalSection(&m_critsec);
if (FAILED(hrStatus))
{
hr = hrStatus;
}
if (SUCCEEDED(hr))
{
if (pSample)
{
IMFSample *pEncodedSample = NULL;
hr = m_pCodec->EncodeSample(pSample, &pEncodedSample);
if (hr == MF_E_TRANSFORM_NEED_MORE_INPUT || pEncodedSample == NULL)
{
hr = m_pReader->ReadSample((DWORD)MF_SOURCE_READER_FIRST_VIDEO_STREAM, 0, NULL, NULL, NULL, NULL);
LeaveCriticalSection(&m_critsec);
return S_OK;
}
LONGLONG llEncodedSampleTimeStamp = 0;
LONGLONG llEncodedSampleDuration = 0;
pEncodedSample->GetSampleTime(&llEncodedSampleTimeStamp);
pEncodedSample->GetSampleDuration(&llEncodedSampleDuration);
pBuffer = NULL;
hr = pEncodedSample->GetBufferByIndex(0, &pBuffer);
if (hr != S_OK)
{
hr = m_pReader->ReadSample((DWORD)MF_SOURCE_READER_FIRST_VIDEO_STREAM, 0, NULL, NULL, NULL, NULL);
LeaveCriticalSection(&m_critsec);
return hr;
}
BYTE *pOutBuffer = NULL;
DWORD dwMaxLength, dwCurrentLength;
hr = pBuffer->Lock(&pOutBuffer, &dwMaxLength, &dwCurrentLength);
if (hr != S_OK)
{
hr = m_pReader->ReadSample((DWORD)MF_SOURCE_READER_FIRST_VIDEO_STREAM, 0, NULL, NULL, NULL, NULL);
LeaveCriticalSection(&m_critsec);
return hr;
}
// Send encoded webcam data to connected clients
//SendData(pOutBuffer, dwCurrentLength, llEncodedSampleTimeStamp, llEncodedSampleDuration);
pBuffer->Unlock();
SafeRelease(&pBuffer);
IMFSample *pDecodedSample = NULL;
m_pCodec->DecodeSample(pEncodedSample, &pDecodedSample);
if (pDecodedSample != NULL)
{
pDecodedSample->SetSampleTime(llTimestamp);
pDecodedSample->SetSampleTime(llTimestamp - llLastSampleTimeStamp);
llLastSampleTimeStamp = llTimestamp;
hr = pDecodedSample->GetBufferByIndex(0, &pBuffer);
//hr = pSample->GetBufferByIndex(0, &pBuffer);
// Draw the frame.
if (SUCCEEDED(hr))
{
hr = m_draw.DrawFrame(pBuffer);
}
SafeRelease(&pDecodedSample);
}
SafeRelease(&pBuffer);
SafeRelease(&pEncodedSample);
}
}
// Request the next frame.
if (SUCCEEDED(hr))
{
hr = m_pReader->ReadSample(
(DWORD)MF_SOURCE_READER_FIRST_VIDEO_STREAM,
0,
NULL, // actual
NULL, // flags
NULL, // timestamp
NULL // sample
);
}
if (FAILED(hr))
{
NotifyError(hr);
}
SafeRelease(&pBuffer);
LeaveCriticalSection(&m_critsec);
return hr;
}
这是编码器/解码器的初始化代码:
HRESULT Codec::InitializeEncoder()
{
IMFMediaType *pMFTInputMediaType = NULL, *pMFTOutputMediaType = NULL;
IUnknown *spTransformUnk = NULL;
DWORD mftStatus = 0;
UINT8 blob[] = { 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0xc0, 0x1e, 0x96, 0x54, 0x05, 0x01,
0xe9, 0x80, 0x80, 0x40, 0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x3c, 0x80 };
CoInitializeEx(NULL, COINIT_APARTMENTTHREADED | COINIT_DISABLE_OLE1DDE);
MFStartup(MF_VERSION);
// Create H.264 encoder.
CHECK_HR(CoCreateInstance(CLSID_CMSH264EncoderMFT, NULL, CLSCTX_INPROC_SERVER, IID_IUnknown, (void**)&spTransformUnk), "Failed to create H264 encoder MFT.\n");
CHECK_HR(spTransformUnk->QueryInterface(IID_PPV_ARGS(&pEncoderTransform)), "Failed to get IMFTransform interface from H264 encoder MFT object.\n");
// Transform output type
MFCreateMediaType(&pMFTOutputMediaType);
pMFTOutputMediaType->SetGUID(MF_MT_MAJOR_TYPE, MFMediaType_Video);
pMFTOutputMediaType->SetGUID(MF_MT_SUBTYPE, MFVideoFormat_H264);
pMFTOutputMediaType->SetUINT32(MF_MT_AVG_BITRATE, 500000);
CHECK_HR(MFSetAttributeSize(pMFTOutputMediaType, MF_MT_FRAME_SIZE, 640, 480), "Failed to set frame size on H264 MFT out type.\n");
CHECK_HR(MFSetAttributeRatio(pMFTOutputMediaType, MF_MT_FRAME_RATE, 30, 1), "Failed to set frame rate on H264 MFT out type.\n");
CHECK_HR(MFSetAttributeRatio(pMFTOutputMediaType, MF_MT_PIXEL_ASPECT_RATIO, 1, 1), "Failed to set aspect ratio on H264 MFT out type.\n");
pMFTOutputMediaType->SetUINT32(MF_MT_INTERLACE_MODE, MFVideoInterlace_MixedInterlaceOrProgressive);
pMFTOutputMediaType->SetUINT32(MF_MT_ALL_SAMPLES_INDEPENDENT, TRUE);
// Special attributes for H264 transform, if needed
/*CHECK_HR(pMFTOutputMediaType->SetUINT32(MF_MT_MPEG2_PROFILE, eAVEncH264VProfile_Base), "Failed to set profile on H264 MFT out type.\n");
CHECK_HR(pMFTOutputMediaType->SetUINT32(MF_MT_MPEG2_LEVEL, eAVEncH264VLevel4), "Failed to set level on H264 MFT out type.\n");
CHECK_HR(pMFTOutputMediaType->SetUINT32(MF_MT_MAX_KEYFRAME_SPACING, 10), "Failed to set key frame interval on H264 MFT out type.\n");
CHECK_HR(pMFTOutputMediaType->SetUINT32(CODECAPI_AVEncCommonQuality, 100), "Failed to set H264 codec qulaity.\n");
CHECK_HR(pMFTOutputMediaType->SetUINT32(CODECAPI_AVEncMPVGOPSize, 1), "Failed to set CODECAPI_AVEncMPVGOPSize = 1\n");*/
CHECK_HR(pEncoderTransform->SetOutputType(0, pMFTOutputMediaType, 0), "Failed to set output media type on H.264 encoder MFT.\n");
// Transform input type
MFCreateMediaType(&pMFTInputMediaType);
pMFTInputMediaType->SetGUID(MF_MT_MAJOR_TYPE, MFMediaType_Video);
pMFTInputMediaType->SetGUID(MF_MT_SUBTYPE, MFVideoFormat_YUY2);
CHECK_HR(MFSetAttributeSize(pMFTInputMediaType, MF_MT_FRAME_SIZE, 640, 480), "Failed to set frame size on H264 MFT out type.\n");
CHECK_HR(MFSetAttributeRatio(pMFTInputMediaType, MF_MT_FRAME_RATE, 30, 1), "Failed to set frame rate on H264 MFT out type.\n");
CHECK_HR(MFSetAttributeRatio(pMFTInputMediaType, MF_MT_PIXEL_ASPECT_RATIO, 1, 1), "Failed to set aspect ratio on H264 MFT out type.\n");
CHECK_HR(pEncoderTransform->SetInputType(0, pMFTInputMediaType, 0), "Failed to set input media type on H.264 encoder MFT.\n");
CHECK_HR(pEncoderTransform->GetInputStatus(0, &mftStatus), "Failed to get input status from H.264 MFT.\n");
if (MFT_INPUT_STATUS_ACCEPT_DATA != mftStatus)
{
printf("E: pEncoderTransform->GetInputStatus() not accept data.\n");
goto done;
}
CHECK_HR(pEncoderTransform->ProcessMessage(MFT_MESSAGE_COMMAND_FLUSH, NULL), "Failed to process FLUSH command on H.264 MFT.\n");
CHECK_HR(pEncoderTransform->ProcessMessage(MFT_MESSAGE_NOTIFY_BEGIN_STREAMING, NULL), "Failed to process BEGIN_STREAMING command on H.264 MFT.\n");
CHECK_HR(pEncoderTransform->ProcessMessage(MFT_MESSAGE_NOTIFY_START_OF_STREAM, NULL), "Failed to process START_OF_STREAM command on H.264 MFT.\n");
return S_OK;
done:
SafeRelease(&pMFTInputMediaType);
SafeRelease(&pMFTOutputMediaType);
return S_FALSE;
}
HRESULT Codec::InitializeDecoder()
{
IUnknown *spTransformUnk = NULL;
IMFMediaType *pMFTOutputMediaType = NULL;
IMFMediaType *pMFTInputMediaType = NULL;
DWORD mftStatus = 0;
// Create H.264 decoder.
CHECK_HR(CoCreateInstance(CLSID_CMSH264DecoderMFT, NULL, CLSCTX_INPROC_SERVER, IID_IUnknown, (void**)&spTransformUnk), "Failed to create H264 decoder MFT.\n");
// Query for the IMFTransform interface
CHECK_HR(spTransformUnk->QueryInterface(IID_PPV_ARGS(&pDecoderTransform)), "Failed to get IMFTransform interface from H264 decoder MFT object.\n");
// Create input mediatype for the decoder
MFCreateMediaType(&pMFTInputMediaType);
pMFTInputMediaType->SetGUID(MF_MT_MAJOR_TYPE, MFMediaType_Video);
pMFTInputMediaType->SetGUID(MF_MT_SUBTYPE, MFVideoFormat_H264);
CHECK_HR(MFSetAttributeSize(pMFTInputMediaType, MF_MT_FRAME_SIZE, 640, 480), "Failed to set frame size on H264 MFT out type.\n");
CHECK_HR(MFSetAttributeRatio(pMFTInputMediaType, MF_MT_FRAME_RATE, 30, 1), "Failed to set frame rate on H264 MFT out type.\n");
CHECK_HR(MFSetAttributeRatio(pMFTInputMediaType, MF_MT_PIXEL_ASPECT_RATIO, 1, 1), "Failed to set aspect ratio on H264 MFT out type.\n");
pMFTInputMediaType->SetUINT32(MF_MT_INTERLACE_MODE, MFVideoInterlace_MixedInterlaceOrProgressive);
pMFTInputMediaType->SetUINT32(MF_MT_ALL_SAMPLES_INDEPENDENT, TRUE);
CHECK_HR(pDecoderTransform->SetInputType(0, pMFTInputMediaType, 0), "Failed to set input media type on H.264 encoder MFT.\n");
CHECK_HR(pDecoderTransform->GetInputStatus(0, &mftStatus), "Failed to get input status from H.264 MFT.\n");
if (MFT_INPUT_STATUS_ACCEPT_DATA != mftStatus)
{
printf("E: pDecoderTransform->GetInputStatus() not accept data.\n");
goto done;
}
// Create outmedia type for the decoder
MFCreateMediaType(&pMFTOutputMediaType);
pMFTOutputMediaType->SetGUID(MF_MT_MAJOR_TYPE, MFMediaType_Video);
pMFTOutputMediaType->SetGUID(MF_MT_SUBTYPE, MFVideoFormat_YUY2);
CHECK_HR(MFSetAttributeSize(pMFTOutputMediaType, MF_MT_FRAME_SIZE, 640, 480), "Failed to set frame size on H264 MFT out type.\n");
CHECK_HR(MFSetAttributeRatio(pMFTOutputMediaType, MF_MT_FRAME_RATE, 30, 1), "Failed to set frame rate on H264 MFT out type.\n");
CHECK_HR(MFSetAttributeRatio(pMFTOutputMediaType, MF_MT_PIXEL_ASPECT_RATIO, 1, 1), "Failed to set aspect ratio on H264 MFT out type.\n");
CHECK_HR(pDecoderTransform->SetOutputType(0, pMFTOutputMediaType, 0), "Failed to set output media type on H.264 decoder MFT.\n");
CHECK_HR(pDecoderTransform->ProcessMessage(MFT_MESSAGE_COMMAND_FLUSH, NULL), "Failed to process FLUSH command on H.264 MFT.\n");
CHECK_HR(pDecoderTransform->ProcessMessage(MFT_MESSAGE_NOTIFY_BEGIN_STREAMING, NULL), "Failed to process BEGIN_STREAMING command on H.264 MFT.\n");
CHECK_HR(pDecoderTransform->ProcessMessage(MFT_MESSAGE_NOTIFY_START_OF_STREAM, NULL), "Failed to process START_OF_STREAM command on H.264 MFT.\n");
return S_OK;
done:
SafeRelease(&pMFTInputMediaType);
SafeRelease(&pMFTOutputMediaType);
return S_FALSE;
}
这是实际的解码/编码器部分:
HRESULT Codec::EncodeSample(IMFSample *pSample, IMFSample **ppEncodedSample)
{
return TransformSample(pEncoderTransform, pSample, ppEncodedSample);
}
HRESULT Codec::DecodeSample(IMFSample *pSample, IMFSample **ppEncodedSample)
{
return TransformSample(pDecoderTransform, pSample, ppEncodedSample);
}
HRESULT Codec::TransformSample(IMFTransform *pTransform, IMFSample *pSample, IMFSample **ppSampleOut)
{
IMFSample *pOutSample = NULL;
IMFMediaBuffer *pBuffer = NULL;
DWORD mftOutFlags;
pTransform->ProcessInput(0, pSample, 0);
CHECK_HR(pTransform->GetOutputStatus(&mftOutFlags), "H264 MFT GetOutputStatus failed.\n");
// Note: Decoder does not return MFT flag MFT_OUTPUT_STATUS_SAMPLE_READY, so we just need to rely on S_OK return
if (pTransform == pEncoderTransform && mftOutFlags == S_OK)
{
return S_OK;
}
else if (pTransform == pEncoderTransform && mftOutFlags == MFT_OUTPUT_STATUS_SAMPLE_READY ||
pTransform == pDecoderTransform && mftOutFlags == S_OK)
{
DWORD processOutputStatus = 0;
MFT_OUTPUT_DATA_BUFFER outputDataBuffer;
MFT_OUTPUT_STREAM_INFO StreamInfo;
pTransform->GetOutputStreamInfo(0, &StreamInfo);
CHECK_HR(MFCreateSample(&pOutSample), "Failed to create MF sample.\n");
CHECK_HR(MFCreateMemoryBuffer(StreamInfo.cbSize, &pBuffer), "Failed to create memory buffer.\n");
if (pTransform == pEncoderTransform)
CHECK_HR(pBuffer->SetCurrentLength(StreamInfo.cbSize), "Failed SetCurrentLength.\n");
CHECK_HR(pOutSample->AddBuffer(pBuffer), "Failed to add sample to buffer.\n");
outputDataBuffer.dwStreamID = 0;
outputDataBuffer.dwStatus = 0;
outputDataBuffer.pEvents = NULL;
outputDataBuffer.pSample = pOutSample;
HRESULT hr = pTransform->ProcessOutput(0, 1, &outputDataBuffer, &processOutputStatus);
if (hr == MF_E_TRANSFORM_NEED_MORE_INPUT)
{
SafeRelease(&pBuffer);
SafeRelease(&pOutSample);
return hr;
}
LONGLONG llVideoTimeStamp, llSampleDuration;
pSample->GetSampleTime(&llVideoTimeStamp);
pSample->GetSampleDuration(&llSampleDuration);
CHECK_HR(outputDataBuffer.pSample->SetSampleTime(llVideoTimeStamp), "Error setting MFT sample time.\n");
CHECK_HR(outputDataBuffer.pSample->SetSampleDuration(llSampleDuration), "Error setting MFT sample duration.\n");
if (pTransform == pEncoderTransform)
{
IMFMediaBuffer *pMediaBuffer = NULL;
DWORD dwBufLength;
CHECK_HR(pOutSample->ConvertToContiguousBuffer(&pMediaBuffer), "ConvertToContiguousBuffer failed.\n");
CHECK_HR(pMediaBuffer->GetCurrentLength(&dwBufLength), "Get buffer length failed.\n");
WCHAR *strDebug = new WCHAR[256];
wsprintf(strDebug, L"Encoded sample ready: time %I64d, sample duration %I64d, sample size %i.\n", llVideoTimeStamp, llSampleDuration, dwBufLength);
OutputDebugString(strDebug);
SafeRelease(&pMediaBuffer);
}
else if (pTransform == pDecoderTransform)
{
IMFMediaBuffer *pMediaBuffer = NULL;
DWORD dwBufLength;
CHECK_HR(pOutSample->ConvertToContiguousBuffer(&pMediaBuffer), "ConvertToContiguousBuffer failed.\n");
CHECK_HR(pMediaBuffer->GetCurrentLength(&dwBufLength), "Get buffer length failed.\n");
WCHAR *strDebug = new WCHAR[256];
wsprintf(strDebug, L"Decoded sample ready: time %I64d, sample duration %I64d, sample size %i.\n", llVideoTimeStamp, llSampleDuration, dwBufLength);
OutputDebugString(strDebug);
SafeRelease(&pMediaBuffer);
}
// Decoded sample out
*ppSampleOut = pOutSample;
//SafeRelease(&pMediaBuffer);
SafeRelease(&pBuffer);
return S_OK;
}
done:
SafeRelease(&pBuffer);
SafeRelease(&pOutSample);
return S_FALSE;
}
我已经为此搜索了很长时间的解决方案,发现了一个与我的问题定义非常相似的问题,但由于它针对的是不同的 API,因此对我没有帮助。 FFMPEG decoding artifacts between keyframes
最好的问候,托尼·里科宁
最佳答案
我来晚了一点,但我可以确认主页上的答案是正确的解决方案。我也遇到了同样的问题,但我只使用了这个示例代码的解码器部分。我在阅读 MP4 文件时发现关键帧之间的伪像越来越多。我一收到关键帧,图像看起来不错,然后逐渐变差。这是我在 Codec::InitializeDecoder() 中添加的代码:
// Set CODECAPI_AVLowLatencyMode
ICodecAPI *mpCodecAPI = NULL;
hr = pDecoderTransform->QueryInterface(IID_PPV_ARGS(&mpCodecAPI));
CHECK_HR(hr, "Failed to get ICodecAPI.\n");
VARIANT var;
var.vt = VT_BOOL;
var.boolVal = VARIANT_TRUE;
hr = mpCodecAPI->SetValue(&CODECAPI_AVLowLatencyMode, &var);
CHECK_HR(hr, "Failed to enable low latency mode.\n");
添加这些更改后,程序运行得更好了!感谢 GitHub 上的这个软件为我提供了必要的代码: https://github.com/GameTechDev/ChatHeads/blob/master/VideoStreaming/EncodeTransform.cpp
关于c++ - Media Foundation 网络摄像头视频 H264 编码/解码在播放时产生伪像,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/41546721/
避免必须自己创建整个相机应用程序,我调用: Intent camera = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); this.startActivit
我使用这种方法从前置摄像头录制视频: Recording video via Mediarecorder 它在我的 Nexus 4 上运行良好,但有人说有很多手机的前置摄像头无法录制视频,只能拍照。我
我正在使用 Android 手机的摄像头作为输入来测试成像算法,并且需要一种方法来始终如一地测试算法。理想情况下,我想获取预先录制的视频源并让手机“假装”视频源是来自相机的实时视频。 我理想的解决方案
我想在 android 上通过 v4l 访问外部 USB 摄像头。 我试过了 SimpleWebCam .在对原始源代码进行一些细微修改后,我实现了使其在 Root过的 android 设备上运行。然
我正在尝试连接两个连接到单个 USB 端口的 USB 网络摄像头。问题是当时只有一个摄像头工作...我在 python 中使用 OpenCV。这可能吗?我的目标是将多台相机连接到一台计算机以进行机器视
我想知道如何在 virtualbox 中使用笔记本电脑的内置网络摄像头和 android x86。 我已经尝试启动默认的“相机”应用程序,它告诉我必须配置 SDCard,我在本教程中所做的:SD ca
我在 64 位华硕的 Ubuntu 12.10 上安装了 ARToolKit。安装没有错误,所以我觉得我没问题。但是当我想尝试一个例子时,它找不到相机。如果我在 char *vconf = ""; 没
我想以编程方式移动 webvr 场景中 View 的位置。为此,我使用了position.add 方法。 以下是我如何以编程方式移动相机: 摄像机移至此处: var obj3d = docume
我正在使用 Camera 2 API 将 JPEG 图像保存在磁盘上。我的 Nexus 5X 目前有 3-4 fps,我想将其提高到 20-30。可能吗? 将图像格式更改为 YUV 我设法生成 30
Baby Monitor (http://www.babymonitor3g.com/) 等应用程序可让两台 iOS 设备相互连接。连接后,一台设备可以激活另一台设备上的摄像头、灯光和麦克风,即使该应
我有一个论坛帖子表单,允许发帖人附加录音和/或网络摄像头快照。这两个都是使用 navigator.getUserMedia() 实现的应用程序接口(interface)。对于音频,我建立了 varia
我对 Opencv 和 Python 有疑问。当我尝试从相机中查看帧时,它无法识别 USB 相机,我使用了带有两个 USB 相机的书籍中的标准代码,问题是只有一个相机工作,我不知道。我在 window
我编写了一个程序,基本上使用步进电机 + a4988 驱动程序将托盘放在连接到 Raspberry Pi 的相机下方。代码将托盘带到起始位置,迈出一步,拍照并重复 10 次。然后托盘返回到起始位置。我
我的 uEye 相机遇到了一个问题。使用我的笔记本电脑摄像头(id 0)或 usb 上的网络摄像头(id 1)这条线完美运行: TheVideoCapturer.open(1); (TheVideoC
我是 Android 版 openCV 的新手,我需要一个在后台运行的图像处理应用(检测图像的线条)。 我已经制作了一个应用程序来完成我需要的所有图像处理(使用 jni),但它不能在后台运行并且它使用
我正在尝试使用 OpenCV 从 USB 摄像头捕获视频。 #include #include using namespace std; using namespace cv; int main(
我正在寻找启用和禁用默认 iPhone 相机的方法,例如在特定时间或纬度/经度。有些地方是禁止摄像头的,所以我们可以在到达这样的地方时关闭它,这里只是举个例子。好吧,我认为在 iPhone 中禁用和启
有人有这种“东西”的工作样本吗? 在理论上,以这种方式实现它是个好主意,但我没有看到任何相关的代码 fragment 来说明如何实现它。 我不要花哨的东西,越简单越好。我只想在单独的线程上实现与相机控
我正在开发一个新网站。您可以加入房间通话并进行语音通话,因此可以使用您的网络摄像头,但您也可以共享您的屏幕。 问题是当我将轨道添加到流中时,对等点不再工作......我不知道如何解决这个问题。我还尝试
我需要在 Flutter 中创建一个考试应用程序,我们需要每隔一段时间拍摄用户的照片和视频,而在执行此操作时我们不想显示相机屏幕。 我尝试使用 Flutter 的 Camera 插件,但我无法找到任何
我是一名优秀的程序员,十分优秀!