Force JPEG. Check, and exit if not.

1 files changed, 9 insertions, 5 deletions

diff --git a/src/v4l.cc b/src/v4l.cc
index 90cfb7c..6e71767 100644
--- a/src/v4l.cc
+++ b/src/v4l.cc
@@ -523,11 +523,15 @@ static void init_device(void)
 
     printf("w: %d\n", fmt.fmt.pix.width);
     printf("h: %d\n", fmt.fmt.pix.height);
-    char *p = (char*)&fmt.fmt.pix.pixelformat;
-    printf("f: %c\n", p[0]);
-    printf("f: %c\n", p[1]);
-    printf("f: %c\n", p[2]);
-    printf("f: %c\n", p[3]);
+
+    char format[5];
+    memcpy(format, &fmt.fmt.pix.pixelformat, 4);
+    format[4] = '\0';
+    printf("format: %s\n", format);
+    if(strcmp(format, "JPEG")) {
+      printf("Webcam does not support JPEG...!\n");
+      exit(1);
+    }
 
     /* Note VIDIOC_S_FMT may change width and height. */
   } else {