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//qWarning() << "update";    QPixmap pixmap = this->grab();    QImage image = pixmap.toImage();    //qWarning() << "byteCount " << image.byteCount();//    BYTE * rgb = new BYTE[bufsize];//    BYTE * yuv = new BYTE[bufsize * 3 / 2];//    RGB2YUV(&pStream, &yuv, 4, 640, 480)    int w = image.width();    int h = image.height();   // image.invertPixels(QImage::InvertRgb);    //==============================================================    AVFrame *pFrameRGB = avcodec_alloc_frame();    // Determine required buffer size and allocate buffer    int numBytes1 = avpicture_get_size(PIX_FMT_RGB32, w, h);    uint8_t *buffer1 = (uint8_t *)av_malloc(numBytes1*sizeof(uint8_t));    avpicture_fill((AVPicture *)pFrameRGB, buffer1, PIX_FMT_RGB32, w, h);    pFrameRGB->data[0] = image.bits();    qWarning() << "numBytes1 " << numBytes1;    AVFrame *pFrameYUV = avcodec_alloc_frame();    // Determine required buffer size and allocate buffer    int numBytes2 = avpicture_get_size(AV_PIX_FMT_YUV420P, w, h);    uint8_t *buffer2 = (uint8_t *)av_malloc(numBytes2*sizeof(uint8_t));    avpicture_fill((AVPicture *)pFrameYUV, buffer2, AV_PIX_FMT_YUV420P, w, h);    qWarning() << "numBytes2 " << numBytes2;    SwsContext *  rgb_to_yuv_ctx = sws_getContext(w,h, PIX_FMT_RGB32,                                  w,h, AV_PIX_FMT_YUV420P,                                  SWS_BICUBIC, NULL,NULL,NULL);//    sws_scale(rgb_to_yuv_ctx, pFrameRGB->data, pFrameRGB->linesize, 0,//            pCodecCtx->height, pFrameYUV->data, pFrameYUV->linesize);    sws_scale(rgb_to_yuv_ctx, pFrameRGB->data, pFrameRGB->linesize, 0,                h, pFrameYUV->data, pFrameYUV->linesize);        int rc = LE_ESVideoData(instance, buffer2, numBytes2);    //qWarning() << rc << endl;    sws_freeContext(rgb_to_yuv_ctx);    av_free(buffer1);    av_free(buffer2);    av_free(pFrameRGB);    av_free(pFrameYUV);

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