swfx.org flv duration v1.1
about
This tool takes FLV files created with versions of the Flash Video Exporter prior to 1.1 (or Sorenson Squeeze) and adds the duration metadata that is available in FLV files encoded with the Flash Video Exporter 1.1.
 
The duration metadata can be received by the updated MediaPlayer in Flash MX 2004 Pro so that you no longer need to enter the duration of the video manually.

Version 1.1 released 26 June 2004.

more information on flv duration
Information on how to access the duration information from ActionScript (that is, without needing to use the MediaPlayer component etc) take a look at this forum: http://flashmx2004.com/forums/index.php?showtopic=961

Specifically read the post dated Jan 20 2004, 10:27 PM from jmrhoade. Note that you may need to modify the NetStream.as file in your Macromedia Flash distribution (as discussed in this article) if you see the error discussed in the article above.

license
Swfx flv duration is released as donation ware.
 
If you find it useful and would like to support our efforts you can donate using PayPal. We suggest a donation of US$10.

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installation
The download is a zipped executable file. The application is written in Java so it will require that Java is installed. If you don't have Java installed you will be prompted to download when you try to run the executable.
 
Please email me if you have any problems using this application.

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download
Email Address:

Approx: 150KB

karl@swfx.org