Animatecc exported via AME my animation video in good color except for several contiguous images/shots with color that was opaque from the rest of the H264 video. My Animate timeline images have consistent color values; no opaque images. I troubleshooted and discovered after several hours that I had tried to put 'video slugs' before those same shots by keyframing about twenty frames before each of my images/shots. In those keyframes I selected the rectangle tool and a black color and created a black canvas for the sets of frames. Thinking there was a connection with my problem, I went back to my animation in the timeline and removed them. I exported my animation again via AME and the result was an H264 video with consistent color throughout that matched my timeline animation. What's going on?