-// if(mwindow->edl->local_session->preview_end <= 0 ||
-// mwindow->edl->local_session->preview_end > new_length)
-// mwindow->edl->local_session->preview_end = new_length;
-// if(mwindow->edl->local_session->preview_start >
-// mwindow->edl->local_session->preview_end)
-// mwindow->edl->local_session->preview_start = 0;
-
-