private void open_video()
{
this.width = (int)this.ti.frame_width;
this.height = (int)this.ti.frame_height;
Xiph.th_stripe_callback stripe_callback;
stripe_callback.ctx = null;
stripe_callback.stripe_decoded = new Xiph.th_stripe_decoded_func(this.stripe_decoded);
Xiph.th_decode_ctl_opts th_decode_ctl_opts = new Xiph.th_decode_ctl_opts();
th_decode_ctl_opts.stripe_callback = stripe_callback;
Xiph.th_decode_ctl(this.td, 7, th_decode_ctl_opts);
}