if (fabs(snap_pts_as_frameno - frameno) < 0.01) {
auto display_func = [this, primary_stream_idx, snap_frame, secondary_frame, fade_alpha]{
if (destination != nullptr) {
if (fabs(snap_pts_as_frameno - frameno) < 0.01) {
auto display_func = [this, primary_stream_idx, snap_frame, secondary_frame, fade_alpha]{
if (destination != nullptr) {