I want to make .avi video file from bitmap images by using c++ code.
I wrote the following code:
//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
My problem is how to implement RGB24toYUV420P()
function, this function will convert RGB24
data from array rgb24Data to YUV420p
and store into array dst_picture.data
for ffmpeg encoder?
Best Answer
You can use
libswscale
fromFFmpeg
like this:Note that you should create an instance of the
SwsContext
object only once, not for each frame.