next_clip_fade_time = std::min(time_left_this_clip, duration_next_clip);
in_pts_start_next_clip = next_clip.pts_in + lrint(next_clip_fade_time * TIMEBASE * speed);
}
next_clip_fade_time = std::min(time_left_this_clip, duration_next_clip);
in_pts_start_next_clip = next_clip.pts_in + lrint(next_clip_fade_time * TIMEBASE * speed);
}