Creating H.264 FLV file as per Spec, does not play with Adobe Flash Player 10

1] We have developed an application to encapsulate H.264 video inside FLV container, following the "Adobe Video File Format Specifications 9". According to the specification the H.264 video data is embedded in FLV tags, as follows
FLV Headers: Meta Tag: Sequence of Video Tag.
But in spite of following the specifications, Adobe Flash Player (version 10) could not play this FLV file. However, some players were able to play this FLV file. The fact that Adobe did not play it was very surprising.
2] We searched and finally found one FLV file, which contained H.264 video (unlike others which usually contained Sorenson's H.263). This file was played fine by Adobe Flash Player. So it led us to investigate further and we found that
[A] the video tag was preceded with 2 byte length of the every "contained" H.264 NALU. This applied to all the NALUs / I-slices/P-slices and so on. This is not documented.
[B] Only the first video tag (containing video sequence params), is preceded by the sequence "01 4D 00 15 FD E1" followed by 2 byte length and then the video data (sequence parameters in this case). What are these additional bytes ? where are they documented ?
Could you pls share your views about the above and point us to the documents, if any, which are in agreement with the above observations.We think there is a discrepency in the document related with authoring FLV file with H.264 content.
Thanks,
Abhijeet Wakle
Sigro Systems

You could push it out to one or two users and test. Moving up to the latest version of Flash Player is USUALLY a good idea, however, if you happen to be on Captivate 4, be aware that there was an issue reported some time ago that once you upgraded your development machine to Flash Player 11 it interfered with publishing out courses. I cannot remember seeing a bugfix issued to Cp4 users for this (someone correct me if I'm wrong). If you're on Cp5 or 5.5 this shouldn't be an issue.

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