- psz_display_mode = var_InheritString( p_demux, "decklink-mode" );
- if( !psz_display_mode || strlen( psz_display_mode ) == 0 || strlen( psz_display_mode ) > 4 ) {
+ psz_display_mode = var_CreateGetNonEmptyString( p_demux, "decklink-mode" );
+ if( !psz_display_mode || strlen( psz_display_mode ) > 4 ) {