if (has_video) {
AVInputFormat *fmt1;
#warning FIXME: find a better interface
- if(!strncmp(video_device,"x11:",4)) {
+ if(video_device&&!strncmp(video_device,"x11:",4)) {
video_grab_format="x11grab";
}
fmt1 = av_find_input_format(video_grab_format);