Stream from Virtual Directories with FLVPlayback Component

Friday, April 18, 2008 by Mistlee

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April 18, 2008

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It's Fatality Friday at Flashnewz this week. Complete pandemonium's broken loose at the office. We've installed a hand-to-hand melee weapons rack in the break room and a drainage system for all the blood that's been pooling into the hallway. Most of us have a signature special move and even a custom fatality. Mine involves a spiked ball on a chain and a ceiling fan. It's pretty glorious.

Yeah, so these cats that made Kung Fu Election have put together a pretty solid fighting game featuring 2008's popular political figureheads. Completely in flash. Obama with a samurai sword, Hillary with blade fans and Giuliani with Wolverine claws. It's so simultaneously awesome as it is ridiculous. People obviously had some fun putting this together. The game art's even nice to look at.

But that's all I pretty much have for this particularly Mortal Kombat themed edition of FlashNewz. There are a couple other groovy sites to check out below as well as the guru himself Stefan Richter once again showing us some more tricks of the trade using FLVPlayback component.

Mark Rivera


For any thoughts or suggestions for a website to be featured in FlashNewz gimme a shout at

And don't forget to check out our Flash Directory

Featured Sites:
Kung Fu Election

Ever wish Hillary or Obama were Mortal Kombat characters? Me either but this quite awesome. I don't even like Giuliani but he rox with his Wolverine claws.

Kung Fu Election

Cool Site for that cute Asian girl from Dead or Alive and Elektra. Cool flash + cutie = worth a look.

Get Out and Play

High production video and flash site suprisingly for the relaunch of the thought ill-fated N-Gage.

Get Out and Play

Stream from Virtual Directories with FLVPlayback Component

Stefan Richter By Stefan Richter

Here comes a little gotcha that could potentially have you pulling your hair out for a fair few hours, and some more once you realise how simple the 'fix' is.
If you are streaming files from FMS (be it version 2 or 3) then you may have made use of its Virtual Directory feature. This allows you to use a key (basically a named mapping) to point FMS at different storage locations for video files.
For example you could configure a key name of 'myvideos' and map this to a location of C:myfilesvideostorage. The tag in vhost.xml would look like this:

myvideos; C:myfilesvideostorage

Then every time a stream is requested via the server will look for the myvideos key in the stream path and if found locate the appropriate video file inside /videostorage (or if required in a subfolder).

The following code would play the file nicevid.flv located at C:myfilesvideostorageclient1nicevid.flv"myvideos/client1/nicevid.flv");

So far so good.

So how would you use this approach with the FLVPlayback component? You may assume that you simply enter somthing such as the following as the video source property:

For a non-mapped location this would probably work. The FLVPlayback component does not normally require you to pass an application instance name so you would not pass one here either (myapp in this case is the application name).

It turns out though that if you use mapping you need to explicitly pass an application instance name, otherwise the FLVPlayback component will utilize videostorage as the instance and lose the mapping. Therefore the correct rtmp string in this case would be

Note that you can substitute myinstance for any name you see fit, it doesn't matter what you pass as long as you pass *something* here. So let's look at the elements of this rtmp string quickly:

rtmp:// - the server address
myapp - the application name
myinstance - the application instance name
videostorage - the named mapping which directs stream requests to the virtual directory we configured
client1 - a subfolder which holds videos
nicevid.flv - the actual video we want to play

Hopefully this helps somebody sometime.


About The Author

Stefan is a certified Flash Developer who has been involved with Flash Media Server since its very early days. From his home office in the UK he has handled a variety of projects, specializing in Flash Video and Rich Internet Applications for clients that include CNET, USA Network and Unilever. Stefan is the author of a series of Adobe Developer Center articles, has spoken at several industry events and contributes a regular column on Flash Video to Streaming Media Magazine. His site is one of the largest online resources on Flash Video.

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