+ p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
+ if( !p_sys )
+ return VLC_ENOMEM;
+
+ var_Create( p_demux, "demuxdump-append", VLC_VAR_BOOL|VLC_VAR_DOINHERIT );
+ var_Get( p_demux, "demuxdump-append", &val );
+ b_append = val.b_bool;
+ if ( b_append )
+ psz_mode = "ab";
+ else
+ psz_mode = "wb";
+