Hello everyone,
I've read the ffmpeg tutorial and I'm trying to figure out how to access to
a precise pixel instead of a line of data. I would like to store all the
pixels in something like a memory buffer and then binarize and save my
frame to the ppm file. The frame is already converted to an RGB format as
you can see here;
https://github.com/mpenkov/ffmpeg-tutorial/blob/master/tutorial01.c.
Can someone help me out (I'm pretty new to ffmpeg) ?
This is the function we need to modify.
void SaveFrame(AVFrame *pFrame, int width, int height, int iFrame) {
FILE *pFile;
char szFilename[32];
int y;
// Open file
sprintf(szFilename, "frame%d.ppm", iFrame);
pFile=fopen(szFilename, "wb");
if(pFile==NULL)
return;
// Write header
fprintf(pFile, "P6\n%d %d\n255\n", width, height);
// Write pixel data
for(y=0; y<height; y++)
fwrite(pFrame->data[0]+y*pFrame->linesize[0], 1, width*3, pFile);
// Close file
fclose(pFile);
}
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