Pseudo Code
static size_t fill_yuv_image_from_file(AVPicture *pict, int frame_index,int
width, int height,FILE *video_dst_filename)
{
uint8_t *video_buf=NULL;
int x,y;
size_t bytesRead;
video_buf =(uint8_t *)malloc((3*width*height)>>1);
//Initialize to zero
memset(video_buf,0,sizeof(uint8_t)* ((3*width*height)>>1));
bytesRead =fread((uint8_t
*)video_buf,sizeof(uint8_t),((3*width*height)>>1),video_dst_filename);
if(feof(video_dst_filename))
{
fprintf(stdout,"\n End of File. BytesRead is :%ld",bytesRead);
free(video_buf);
return END_OF_FILE;
}
if(bytesRead)
{
fprintf(stdout,"\n No Of Video Bytes Read :%ld",bytesRead);
/* Y */
for(y =0;y < height ;y++){
for(x = 0; x < width; x++){
pict->data[0][y * pict->linesize[0] + x]=*video_buf++;
}
}
/* Cb */
for (y = 0; y < height / 2; y++) {
for (x = 0; x < width / 2; x++) {
pict->data[1][y * pict->linesize[1] + x] = *video_buf++;
//[y*height+x];
}
}
/* Cr */
for (y = 0; y < height / 2; y++) {
for (x = 0; x < width / 2; x++) {
pict->data[2][y * pict->linesize[2] + x] = *video_buf++;
//[y*height+(x+1)];
}
}
video_buf-=((3*width*height)>>1);
}
else{
fprintf(stdout,"\n Video Bytes Read:%ld",bytesRead);
}
free(video_buf);
return bytesRead;
}
From: [email protected] [mailto:[email protected]] On
Behalf Of Francesco Damato
Sent: Wednesday, October 16, 2013 8:05 PM
To: This list is about using libavcodec, libavformat, libavutil, libavdevice
and libavfilter.
Subject: [Libav-user] encoder h264
Hi,
i am writing a C program (encoder) that use h264 to encode video read from avi
or mp4 file; the avcodec_encode_video2 function takes input raw video data from
frame, so i demux my files and i obtain a raw video file; now i want encode it,
so how can i open the raw file, read the frames and encode them into h264??
I saw the example decoding_encoding.c that generates a video from dummy
pictures... but how do I replace this part and read and encode my rawvideo file?
Can you help me, there are other examples or books available?
Thanks!!!
--
Francesco Damato
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