FFMPEG帧到DirectX表面 [英] FFMPEG Frame to DirectX Surface
本文介绍了FFMPEG帧到DirectX表面的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
给定一个从FFMPEG的 avcodec_decode_video
()函数指向AVFrame的指针,如何将图像复制到DirectX表面? (假设我有一个指向适当大小的DX X8R8G8B8表面的指针。)
Given a pointer to an AVFrame from FFMPEG's avcodec_decode_video
() function how do I copy the image to a DirectX surface? (Assume I have a pointer to an appropriately sized DX X8R8G8B8 surface.)
谢谢。
John。 / p>
John.
推荐答案
您可以使用FFMPEG的img_convert()函数将图像同时复制到表面并将其转换为RGB格式。这里有几行代码粘贴从我最近的一个项目,我做了一个类似的事情(虽然我使用SDL而不是DirectX):
You can use FFMPEG's img_convert() function to simultaneously copy the image to your surface and convert it to RGB format. Here's a few lines of code pasted from a recent project of mine which did a similar thing (although I was using SDL instead of DirectX):
AVFrame *frame;
avcodec_decode_video(_ffcontext, frame, etc...);
lockYourSurface();
uint8_t *buf = getPointerToYourSurfacePixels();
// Create an AVPicture structure which contains a pointer to the RGB surface.
AVPicture pict;
memset(&pict, 0, sizeof(pict));
avpicture_fill(&pict, buf, PIX_FMT_RGB32,
_ffcontext->width, _ffcontext->height);
// Convert the image into RGB and copy to the surface.
img_convert(&pict, PIX_FMT_RGB32, (AVPicture *)frame,
_context->pix_fmt, _context->width, _context->height);
unlockYourSurface();
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