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我的应用程序通过SDL + ffmpeg库(不是exe工具)播放视频。通过程序对YUV视频数据(SDL_Overlay)执行Sdd水印
,我想给文本添加到视频
的FFmpeg的VHOOK source code显示它的数据转换为RGB32。 不能直接在YUV中完成吗?
在这里我现在的代码,你能给我一些建议吗?
SDL_Overlay * pOverlay = SDL_CreateYUVOverlay(pDecodedFrame->width
, pDecodedFrame->height
, SDL_YV12_OVERLAY
, pThis->m_pSurface
);
if(pOverlay != NULL)
{
SDL_LockYUVOverlay(pOverlay);
pSwsContext = sws_getCachedContext(pSwsContext
, pDecodedFrame->width
, pDecodedFrame->height
, pThis->m_pMediaFile->GetVideoPixcelFormat()
, pDecodedFrame->width
, pDecodedFrame->height
, PIX_FMT_YUV420P
, SWS_SPLINE
, NULL
, NULL
, NULL
);
AVPicture tPicture;
tPicture.data[0] = pOverlay->pixels[0];
tPicture.data[1] = pOverlay->pixels[2];
tPicture.data[2] = pOverlay->pixels[1];
tPicture.linesize[0] = pOverlay->pitches[0];
tPicture.linesize[1] = pOverlay->pitches[2];
tPicture.linesize[2] = pOverlay->pitches[1];
int nSliceHeight = sws_scale(pSwsContext
, pDecodedFrame->data
, pDecodedFrame->linesize
, 0
, pDecodedFrame->height
, tPicture.data
, tPicture.linesize
);
SDL_UnlockYUVOverlay(pOverlay);
VideoPicture tVideoPicture = {0};
tVideoPicture.pOverlay = pOverlay;
tVideoPicture.nWidth = pDecodedFrame->width;
tVideoPicture.nHeight = pDecodedFrame->height;
tVideoPicture.dbPTS = dbPTS;
pThis->m_pVideoPictureQueue.Append(tVideoPicture);
}