我想使用 C++ 代码从位图图像制作 .avi 视频文件。
我写了以下代码:
//Get RGB array data from bmp file
uint8_t* rgb24Data = new uint8_t[3*imgWidth*imgHeight];
hBitmap = (HBITMAP) LoadImage( NULL, _T("myfile.bmp"), IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE);
GetDIBits(hdc, hBitmap, 0, imgHeight, rgb24Data , (BITMAPINFO*)&bmi, DIB_RGB_COLORS);
/* Allocate the encoded raw picture. */
AVPicture dst_picture;
avpicture_alloc(&dst_picture, AV_PIX_FMT_YUV420P, imgWidth, imgHeight);
/* Convert rgb24Data to YUV420p and stored into array dst_picture.data */
RGB24toYUV420P(imgWidth, imgHeight, rgb24Data, dst_picture.data); //How to implement this function?
//code for encode frame dst_picture here
我的问题是如何实施RGB24toYUV420P()
函数,该函数将转换RGB24
数据从数组 rgb24Data 到YUV420p
并存储到数组中dst_picture.data
对于 ffmpeg 编码器?