How to disable url conversion for media in TinyMCE?

wuya

I'm using the media plug-in to insert a flash swf object into a textarea, but the source is a relative path like "../flash/1.swf", and the HTML becomes something like "/iw-cc/flash/1.swf", which is obviously wrong.

I had similar problem with images in the past, and I have solved that problem by setting the tinymce config convert_urls to false, and it worked for images, but not media objects. So anyone knows what I can do to disable this automatic url conversion for media and have the url remain "../flash/1.swf"? Thanks.