[linux-dvb] displaying image on the dvb card

[Alessio Sangalli]

Hi, I'm trying to display an image on the DVB card, I've read a thread 
on the linux-dvb mailing list:

http://linuxtv.org/mailinglists/linux-dvb/2001/03-2001/msg00445.html

However, I only get a black screen...

I take my image, I resize it with 'display' to 352x288;

then I encode it with:
convert test.jpg test.mpeg
(convert uses mpeg2encode from mpeg.org)

This creates a file of about 10KB in size. Then I give this file to a 
program very similar to the one written by Marcus on the mailing list 
(see below)...

I tried many times, but I alway get than black screen. Do you have any
advice?


bye, thank you
as

The program listing:

#include <stdlib.h>
#include <linux/videodev.h>
#include <ost/dmx.h>
#include <ost/sec.h>
#include <ost/frontend.h>
#include <ost/video.h>
#include <ost/audio.h>
#include <ost/osd.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>



int main(int argc, char **argv)
{
         int filefd;
         struct stat st;
         struct videoDisplayStillPicture sp;
         int fd;
         int ans;

         if (argc < 2) return -1;
         if ( (filefd = open(argv[1], O_RDONLY)) < 0)
         {
                 perror("File open:");
                 return 1;
         }
         if((fd = open("/dev/ost/video", O_RDWR|O_NONBLOCK)) < 0){
                 perror("VIDEO DEVICE: ");
                 return -1;
         }
         fstat(filefd, &st);

         sp.iFrame = (char *) malloc(st.st_size);
         sp.size = st.st_size;
         printf("I-frame size: %d\n", sp.size);
         printf("read: %d bytes\n", read(filefd,sp.iFrame,sp.size));
         if ((ans = ioctl(fd, VIDEO_STILLPICTURE, sp)) < 0)
         {
                 perror("VIDEO STILLPICTURE: ");
                 return 1;
         }
         sleep(3);
}



and I compile this with:
g++ -I/usr/src/DVB/ost/include/ test.c



bye thank you
as






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