From bb34d147997de5dd422749c649099b47ddaa9adb Mon Sep 17 00:00:00 2001
From: niels <niels@dyne.org>
Date: Fri, 22 May 2015 19:44:00 +0200
Subject: [PATCH] check if width and height are set for loopback device

---
 veejay-current/veejay-server/libstream/v4l2utils.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/veejay-current/veejay-server/libstream/v4l2utils.c b/veejay-current/veejay-server/libstream/v4l2utils.c
index 717b1cbb..d84b7863 100644
--- a/veejay-current/veejay-server/libstream/v4l2utils.c
+++ b/veejay-current/veejay-server/libstream/v4l2utils.c
@@ -954,6 +954,14 @@ void *v4l2open ( const char *file, const int input_channel, int host_fmt, int wi
 	v4l2_enum_video_standards( v, norm );
 	v4l2_enum_frame_sizes(v);
 
+	if( v->is_vloopback == 1 && (wid == 0 || hei == 0 ) ) {
+		veejay_msg(VEEJAY_MSG_ERROR, "v4l2: please set width and height (-w and -h) for video loopback device");
+		free(v);
+		close(fd);
+		return NULL;
+	}
+
+
 	if( v4l2_configure_format( v, host_fmt, wid, hei ) == 0 ) {
 		veejay_msg(VEEJAY_MSG_ERROR, "v4l2: Failed to negotiate pixel format with your capture device.");
 		free(v);