Kdenlive não renderiza corretamente

convidado@linux:~$ kdenlive
File given: true
Color mode changed to 0
File given: true
QWidget::insertAction: Attempt to insert null action
QWidget::insertAction: Attempt to insert null action
QInotifyFileSystemWatcherEngine::addPaths: inotify_add_watch failed: Permissão negada
QFileSystemWatcher: failed to add paths: /etc/security/fileshare.conf
//STARTING RENDERING: true , false , "/usr/bin/melt" , "dv_ntsc" , "avformat" , "-" , "/tmp/kde-convidado/kdenliveQU5506.mlt" , "/home/convidado/kdenlive/semtitulo.avi" , () , ("f=avi", "vcodec=dvvideo", "pix_fmt=yuv411p", "acodec=pcm_s16le", "s=720x480", "profile=dv_ntsc") , -1 , -1
Started render process: "/usr/bin/melt" "/tmp/kde-convidado/kdenliveQU5506.mlt -profile dv_ntsc -consumer avformat:/home/convidado/kdenlive/semtitulo.avi progress=1 f=avi vcodec=dvvideo pix_fmt=yuv411p acodec=pcm_s16le s=720x480 profile=dv_ntsc"
Rendering of "/home/convidado/kdenlive/semtitulo.avi" aborted, resulting video will probably be corrupted.
kdenlive(5506)/kdecore (KConfigSkeleton) KCoreConfigSkeleton::writeConfig:
convidado@linux:~$