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我想使用libavcodec将HBitmap转换为视频流。 我用得到我的HBITMAP:将位图保存到视频(libavcodec ffmpeg)
HBITMAP hCaptureBitmap =CreateCompatibleBitmap(hDesktopDC, nScreenWidth, nScreenHeight);
SelectObject(hCaptureDC,hCaptureBitmap);
BitBlt(hCaptureDC,0,0,nScreenWidth,nScreenHeight,hDesktopDC,0,0,SRCCOPY);
,我想将其转换为YUV(这是由我使用的编解码器需要)。为此我使用:
SwsContext *fooContext = sws_getContext(c->width,c->height,PIX_FMT_BGR32, c->width,c->height,PIX_FMT_YUV420P,SWS_FAST_BILINEAR,NULL,NULL,NULL);
uint8_t *movie_dib_bits = reinterpret_cast<uint8_t *>(bm.bmBits) + bm.bmWidthBytes * (bm.bmHeight - 1);
int dibrowbytes = -bm.bmWidthBytes;
uint8_t* data_out[1];
int stride_out[1];
data_out[0] = movie_dib_bits;
stride_out[0] = dibrowbytes;
sws_scale(fooContext,data_out,stride_out,0,c->height,picture->data,picture->linesize);
但是,这根本不起作用......任何想法为什么?或者我怎样才能做到这一点?
谢谢!