media example with one APNG source qualified with a type attribute.

Note: Picturefill supports APNG types on any source element, and will disregard a source if its type is not supported in a particular environment.

<picture>
        <!--[if IE 9]><video style="display: none;"><![endif]-->
        <source srcset="../examples/images/ballanim.png" type="image/x-apng">
        <source srcset="../examples/images/ballanim.gif" type="image/gif">
        
        <!--[if IE 9]></video><![endif]-->
        <img srcset="../examples/images/ballanim.gif" alt="A giant stone face at The Bayon temple in Angkor Thom, Cambodia">
</picture>

Also note that the Mime Type image/x-apng is not real — it is only used by picturefill to distinguish between PNG and APNG (this is experimental and may be changed in a later release).