rien n'est simple, mais il faut avancer

v4l2/t.c

@@ -22,8 +22,9 @@ int		verbosity;
 /* --------------------------------------------------------------------- */
 int essai(char *dev, int k)
 {
-int			vfd, foo;
-struct v4l2_format	fmt;
+int				vfd, foo;
+struct v4l2_format		fmt;
+struct v4l2_requestbuffers      reqbuf;
 
 fprintf(stderr, ">>> %s ( '%s' %d )\n", __func__, dev, k);
 
@@ -43,11 +44,17 @@ pr_v4l2_format("before ioctl", &fmt);
 
 foo = ioctl(vfd, VIDIOC_S_FMT, &fmt);
 fprintf(stderr, "ioctl -> %d\n", foo);
-if (foo < 0))	perror("ioctl S_FMT");
+if (foo < 0)	{
+	perror("ioctl S_FMT");
+	exit(1);
+	}
 
 pr_v4l2_format("after ioctl", &fmt);
 
 /*        todo V4L2_BUF_TYPE_VIDEO_CAPTURE */
+memset(&reqbuf, 0, sizeof(reqbuf));
+pr_v4l2_requestbuffers("after 0", &reqbuf);
+
 
 return k;
 }
@@ -66,6 +73,9 @@ puts("\t-d\tselect the video device");
 puts("\t-K\tset the K parameter");
 puts("\t-l\tlist video devices");
 puts("\t-v\tincrease verbosity");
+
+if (verbosity) { puts(""); fimg_print_version(1); }
+
 exit(0);
 }
 /* --------------------------------------------------------------------- */

v4l2/v4l2_pr_structs.c

@@ -52,7 +52,7 @@ return 0;
 /* --------------------------------------------------------------------- */
 int pr_v4l2_requestbuffers(char *txt, struct v4l2_requestbuffers *ptr)
 {
-fprintf(FP, "-- v4l2_requestbuffers, at %p\n", ptr);
+fprintf(FP, "-- v4l2_requestbuffers, %s %p\n", txt, ptr);
 fprintf(FP, "   type %d\n", ptr->type);		/* enum v4l2_buf_type */