V4L2: shrink PTS delay

modules/access/v4l2.c

@@ -283,7 +283,7 @@ vlc_module_begin ()
     add_string( CFG_PREFIX "aspect-ratio", "4:3", NULL, ASPECT_TEXT,
               ASPECT_LONGTEXT, true )
     add_float( CFG_PREFIX "fps", 0, NULL, FPS_TEXT, FPS_LONGTEXT, true )
-    add_integer( CFG_PREFIX "caching", DEFAULT_PTS_DELAY / 1000, NULL,
+    add_integer( CFG_PREFIX "caching", 50 /* ms */, NULL,
                 CACHING_TEXT, CACHING_LONGTEXT, true )
 #ifdef HAVE_LIBV4L2
     add_bool( CFG_PREFIX "use-libv4l2", false, NULL, LIBV4L2_TEXT, LIBV4L2_LONGTEXT, true );