video/audio elements not recognized in IE6-8 even with MediaElement.js

[nacin]

​http://irclogs.wordpress.org/chanlog.php?channel=wordpress-dev&day=2013-07-31&sort=asc#m653229

We need to do a poor man's HTML5 shiv for the audio and video elements whenever we want to use them.

wp-mediaelement.js is too late — it *must* occur prior to the element in the DOM.

[ocean90]

echo "<!--[if lt IE 9]><script>document.createElement('video');</script><![endif]-->";

for wp_video_shortcode and

echo "<!--[if lt IE 9]><script>document.createElement('audio');</script><![endif]-->";

for wp_audio_shortcode.

[nacin]

In 24931:

When rendering an audio or video shortcode in IE 6-8, call document.createElement() as a poor man's HTML5 shiv. see #24902.

[nacin]

In 24932:

When rendering an audio or video shortcode in IE 6-8, call document.createElement() as a poor man's HTML5 shiv. see #24902.

Merges [24931] to the 3.6 branch.

[ocean90]

The other issue could be tracked down too...

There are differences between SCRIPT_DEBUG on and off. If on all is fine, if not, the sky is falling down.

SCRIPT_DEBUG false: <param name="source" value="silverlightmediaelement.xap"/>
SCRIPT_DEBUG true: <param name="source" value="http://example.com/wp-includes/js/mediaelement/silverlightmediaelement.xap"/>

Why? ​That's why!
It's going through all <script> and tries to find mediaelement-and-player.*. Because it's going through load-scripts.php as ?load=foo,bar,wp-mediaelement it can't find it.

Solution: Set pluginPath, see 24902.3.diff​ (We will do it in a better way without hardcoding it.)

[azaozz]

24902.4.diff fixes the issues with the missing path to the mediaelement directory when scripts are concatenated.

[aaroncampbell]

Just getting home and testing all this. The changes in [24931] and [24932] seem to make the video play as expected for me in IE 7-9 (it uses Flash and without Flash it falls back to a download link in a box).

For the SCRIPT_DEBUG issue, 24902.4.diff​ works for me but .3 did not.

[aaroncampbell]

I caught up on all the IRC logs and everything finally. The .3 patch didn't work for me because my install wasn't in root. Still, .4 is working really well here. I tested it in IE 7 and 8 in XP and in IE 9 and 10 on Windows 7.

[nacin]

In 24940:

Pass pluginPath to MediaElement.js, fixing playback when ME.js is served through load-scripts.php.

props ocean90, wonderboymusic, azaozz.
fixes #24902.

[nacin]

In 24941:

Pass pluginPath to MediaElement.js, fixing playback when ME.js is served through load-scripts.php.

Merges [24940] to the 3.6 branch.

props ocean90, wonderboymusic, azaozz.
fixes #24902.