Transition time doesn't work with CSS3 - html

Question

I'm making a website with a full background image transition.
The problem is the animation, i can't make them work properly. I want them to fade from one to another without the black screen between the images. This is my website in live: http://testes-cmt.bl.ee
I've tried a lot of things, but i can't fix this problem, even when trying to change the time.
Does anyone knows how to fix this?
This is my code so far:
HTML:
<ul class="cb-slideshow">
<li><span>Image 01</span></li>
<li><span>Image 02</span></li>
<li><span>Image 03</span></li>
<li><span>Image 04</span></li>
</ul>
CSS:
.cb-slideshow li span {
width: 100%;
height: 100%;
position: absolute;
top: 0px;
left: 0px;
color: transparent;
background-size: cover;
background-position: 50% 50%;
background-repeat: none;
opacity: 0;
z-index: 0;
-webkit-backface-visibility: hidden;
-webkit-animation: imageAnimation 32s linear infinite 0s;
-moz-animation: imageAnimation 32s linear infinite 0s;
-o-animation: imageAnimation 32s linear infinite 0s;
-ms-animation: imageAnimation 32s linear infinite 0s;
animation: imageAnimation 32s linear infinite 0s;
}
.cb-slideshow li div {
z-index: 1000;
position: absolute;
bottom: 30px;
left: 0px;
width: 100%;
text-align: center;
opacity: 0;
color: #fff;
-webkit-animation: titleAnimation 32s linear infinite 0s;
-moz-animation: titleAnimation 32s linear infinite 0s;
-o-animation: titleAnimation 32s linear infinite 0s;
-ms-animation: titleAnimation 32s linear infinite 0s;
animation: titleAnimation 32s linear infinite 0s;
}
.cb-slideshow li:nth-child(1) span {
background-image: url(../images/1.jpg)
}
.cb-slideshow li:nth-child(2) span {
background-image: url(../images/2.jpg);
-webkit-animation-delay: 8s;
-moz-animation-delay: 8s;
-o-animation-delay: 8s;
-ms-animation-delay: 8s;
animation-delay: 8s;
}
.cb-slideshow li:nth-child(3) span {
background-image: url(../images/3.jpg);
-webkit-animation-delay: 16s;
-moz-animation-delay: 16s;
-o-animation-delay: 16s;
-ms-animation-delay: 16s;
animation-delay: 16s;
}
.cb-slideshow li:nth-child(4) span {
background-image: url(../images/4.jpg);
-webkit-animation-delay: 24s;
-moz-animation-delay: 24s;
-o-animation-delay: 24s;
-ms-animation-delay: 24s;
animation-delay: 24s;
}
.cb-slideshow li:nth-child(2) div {
-webkit-animation-delay: 8s;
-moz-animation-delay: 8s;
-o-animation-delay: 8s;
-ms-animation-delay: 8s;
animation-delay: 8s;
}
.cb-slideshow li:nth-child(3) div {
-webkit-animation-delay: 16s;
-moz-animation-delay: 16s;
-o-animation-delay: 16s;
-ms-animation-delay: 16s;
animation-delay: 16s;
}
.cb-slideshow li:nth-child(4) div {
-webkit-animation-delay: 24s;
-moz-animation-delay: 24s;
-o-animation-delay: 24s;
-ms-animation-delay: 24s;
animation-delay: 24s;
}
#-webkit-keyframes imageAnimation {
0% { opacity: 0;
-webkit-animation-timing-function: ease-in; }
8% { opacity: 1;
-webkit-animation-timing-function: ease-out; }
17% { opacity: 1 }
25% { opacity: 0 }
100% { opacity: 0 }
}
#-moz-keyframes imageAnimation {
0% { opacity: 0;
-moz-animation-timing-function: ease-in; }
8% { opacity: 1;
-moz-animation-timing-function: ease-out; }
17% { opacity: 1 }
25% { opacity: 0 }
100% { opacity: 0 }
}
#-o-keyframes imageAnimation {
0% { opacity: 0;
-o-animation-timing-function: ease-in; }
8% { opacity: 1;
-o-animation-timing-function: ease-out; }
17% { opacity: 1 }
25% { opacity: 0 }
100% { opacity: 0 }
}
#-ms-keyframes imageAnimation {
0% { opacity: 0;
-ms-animation-timing-function: ease-in; }
8% { opacity: 1;
-ms-animation-timing-function: ease-out; }
17% { opacity: 1 }
25% { opacity: 0 }
100% { opacity: 0 }
}
#keyframes imageAnimation {
0% { opacity: 0;
animation-timing-function: ease-in; }
8% { opacity: 1;
animation-timing-function: ease-out; }
17% { opacity: 1 }
25% { opacity: 0 }
100% { opacity: 0 }
}

Answer 1

The quickest way I found to make the transitions crossfade rather than go through black was to adjust the #keyframes to extend the opacity: 1 time:
#keyframes imageAnimation {
0% { opacity: 0;
animation-timing-function: ease-in; }
8% { opacity: 1;
animation-timing-function: ease-out; }
30% { opacity: 1 }
40% { opacity: 0 }
100% { opacity: 0 }
}
Something like this JSFiddle.