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pre { line-height: 125%; margin: 0; }
td.linenos pre { color: #000000; background-col
/* display single iframes as stillimages
 * iframes can be created with the 'convert' tool from imagemagick
 * and mpeg2encode from ftp.mpeg.org, and must have a supported
 * size, e.g. 702x576:
 *   $ convert -sample 702x576\! test.jpg test.mpg
 *
 * or more advanced using netpbm and mpeg2enc (not mpeg2encode) :
 *   $ cat image.jpg | jpegtopnm | pnmscale -xsize=704 -ysize=576 |\
 *      ppmntsc --pal | ppmtoy4m  -F 25:1 -A 4:3 -S 420mpeg2 |\
 *      mpeg2enc -f 7 -T 90 -F 3 -np -a 2 -o "image.mpg"
 *
 */

#include <sys/ioctl.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <time.h>
#include <unistd.h>

#include <linux/types.h>
#include <linux/dvb/video.h>


static const char *usage_string = "\n\t"
	"usage: %s <still.mpg> [still.mpg ...]\n"
	"
EODEV=\"/dev/dvb/adapter1/video1\".\n\t" "to display the image <n> seconds, instead of 10, set the variable SSTIME\n\t" "e.g. [user@linux]$ export SSTIME=\"60\" to display the still for 1 minute.\n\t" "this options can be set in the same line as the %s command:\n\t" "e.g. $ SSTIME=25 VIDEODEV=/dev/dvb/adapter1/video1 %s ...\n"; int main (int argc, char **argv) { int fd; int filefd; struct stat st; struct video_still_picture sp; char *videodev = "/dev/dvb/adapter0/video0"; char *env_sstime; int i = 1; int tsec = 10; if (argc < 2) { fprintf (stderr, usage_string, argv[0],argv[0],argv[0]); return -1; } if (getenv ("VIDEODEV")) videodev = getenv("VIDEODEV"); if (getenv ("SSTIME")) { env_sstime = getenv("SSTIME"); tsec = atoi(env_sstime); } if ((fd = open(videodev, O_RDWR)) < 0) { perror(videodev); return -1; } next_pic: printf("I-frame : '%s'\n", argv[i]); if ((filefd = open(argv[i], O_RDONLY)) < 0) { perror(argv[i]); 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); if (!sp.iFrame) { fprintf (stderr, "No memory for I-Frame\n"); return -1; } printf ("read: %d bytes\n", (int) read(filefd, sp.iFrame, sp.size)); close(filefd); if ((ioctl(fd, VIDEO_STILLPICTURE, &sp) < 0)) { perror("ioctl VIDEO_STILLPICTURE"); return -1; } free(sp.iFrame); printf("Display image %d seconds ...\n",tsec); sleep(tsec); printf("Done.\n"); if (argc > ++i) goto next_pic; return 0; }