sample_yuv.c

#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[])
{
	int h,w;
	int width;
	int height;
	int total;
	size_t frame_size;
	long filesize;
	FILE *fp_in;
	FILE *fp_out;
	unsigned char y,u,v;
	unsigned char *frame_buf;

	if(argc < 5)
	{
		printf("Usage\n");
		printf("  %s movie.yuv movie_out.yuv 1920 1080\n", argv[0]);
		exit(1);
	}

	width=atoi(argv[3]);
	height=atoi(argv[4]);
	total=width*height;
	frame_size=total+total/4+total/4;

	frame_buf=(unsigned char *)malloc(sizeof(unsigned char)*frame_size);

	printf("video size: %d x %d\n", width, height);

	if(NULL==(fp_in = fopen(argv[1], "rb")))
	{
		fprintf(stderr, "cant open %s\n", argv[1]);
		exit(1);
	}

	if(NULL==(fp_out = fopen(argv[2], "wb")))
	{
		fprintf(stderr, "cant open %s\n", argv[2]);
		exit(1);
	}

	fseek(fp_in, 0, 2);
	filesize = ftell(fp_in);
	fseek(fp_in, 0, 0);

	while(frame_size==fread(frame_buf, 1, frame_size, fp_in))
	{
		for(w=0;w<width;w++)
		{
			for(h=0;h<height;h++)
			{
				y=frame_buf[h*width+w];
				u=frame_buf[(h/2)*(width/2)+(w/2)+total];
				v=frame_buf[(h/2)*(width/2)+(w/2)+total+(total/4)];
			}
		}

		printf("%ld/%ld(%5.1f%%)\n", ftell(fp_in)/frame_size, filesize/frame_size, (double)ftell(fp_in)/filesize*100);

		fwrite(frame_buf, 1, frame_size, fp_out);
	}

	free(frame_buf);

	return 0;
}