URL Event cuepoints embedded in live flv stream

I would like to stream live flv files with on-the-fly embedded cuepoints to synchronize slide shows to the live stream
I use the function frequently on on-demand streams, but those are static xml cuepoint lists
I understand that it can be done. I read in the doucmentation that there are navigation and event streams embedded in the .flv, regardless of whether it's live or on-demand. I need a way to enter cue points at the encoder and to set a listener for them in the player. I know the url i will be calling for ahead of time, just not the time in the event that it will be called.
Thanks for your help..

Charles,
Thanks for your response. Our use case seems is pretty basic. We have a live stream which will have cuepoints added at random times of the live encode. Additionally we want to retain the functionality for cuepoints added by actionscript to the dynamic timeline metadata The stream is h.264 and the encoder is inserting an in-stream callback for the cue point.
I know I can create a custom callback on the NetStream.client, but was initially investigating if they could/would be handled by current OSMF timeline processes. Another method I have thought of is to use different handlers for the embedded and dynamic timelines. MARKER_ADD events on the embedded timeline trigger an action immediately, rather than waiting for the MARKER_TIME_REACHED event.
Thanks,
Jeff

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URL Event cuepoints embedded in live flv stream

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