int w = mwindow->edl->session->output_w;
int h = mwindow->edl->session->output_h;
VFrame *vframe = new VFrame(w, h, BC_RGB888);
+ vframe->clear_frame();
int sample_rate = mwindow->edl->get_sample_rate();
int channels = mwindow->edl->session->audio_channels;
if( channels > 2 ) channels = 2;