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Captain_James
Participant
May 14, 2009
Answered

MBR (multibitrate) file support

  • May 14, 2009
  • 1 reply
  • 810 views

I've been reading about FMS 3.5's support for dynamic streaming capabilities, and can see how to set everything up so that if I have, say, 4 otherwise identical flv's with different bitrates, I can cause my video player to switch between them as required to fit the bandwidth at that moment.

What I'd like to know is whether there's any support for employing dynamic streaming with true multibitrate files — I think it's called "drift-free" streaming — where several bitrates are encoded into a single file (some WMV's do this).  To be honest, I'm more of an overall Flash developer than video specialist, so if I say or ask anything that seems silly or obvious, please be gentle.

I guess my questions are two:

1) Can FMS stream MBR files like I'm describing?

2) If it can, can the new classes for dynamic streaming work (or be adapted to work) with the multiple streams encoded within such files?

Many thanks!

    This topic has been closed for replies.
    Correct answer Laurel_Reitman

    Dynamic Streaming with Flash Media Server 3.5 uses seperate files.  The feature was specifically designed to work with existing files that you may have already encoded.  We don't support or require specially encoded files.  There are some best practices posted in the developer center, http://www.adobe.com/devnet/flashmediaserver/articles/dynstream_on_demand.html.  But we do not support multiple bit rates within a single file.

    Laurel Reitman

    Sr Product Manager

    1 reply

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    Laurel_ReitmanCorrect answer
    Participating Frequently
    June 1, 2009

    Dynamic Streaming with Flash Media Server 3.5 uses seperate files.  The feature was specifically designed to work with existing files that you may have already encoded.  We don't support or require specially encoded files.  There are some best practices posted in the developer center, http://www.adobe.com/devnet/flashmediaserver/articles/dynstream_on_demand.html.  But we do not support multiple bit rates within a single file.

    Laurel Reitman

    Sr Product Manager

    C
    Captain_JamesAuthor
    Participant
    June 1, 2009

    Thanks, Laurel.  I was beginning to wonder if anyone knew the answer

    Any ideas on whether this might be an included feature of version 4?  My understanding is that Windows Media can now operate this way, and it greatly reduces encoding time (one stream vs several), not to mention making file management easier.

    James

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