vlc freezes on FLV videos

im using VLC 2.1.4 on a openSUSE 13.1
i had a weird problem after i downloaded some videos with ktorrent
then i tried to play these videos and weirdly stops both video and audio at 19th second , i played these videos with banshee and nothing wrong happened !!!
how can i fix this with VLC ?:stuck_out_tongue: