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essaeyu
Known Participant
August 4, 2006
Question

Regarding Standards & Codecs

  • August 4, 2006
  • 4 replies
  • 454 views
Hi,

I have following queries related to Flash/Flash Media Server:

a) The ITU (International Telecommunications Union) has come up with different standards and protocols for videoconferencing e.g. H.323, H.320 etc. Of these, H.323 is the standard for videoconferencing over TCP/IP networks. If I develop a videoconferencing / multimedia chat application using Flash Media Server, which of the ITU standards if any will it conform to, if any? If not, has Macromedia developed its own standard?

b) Which video codec does the latest Flash video use? Is it ‘Spark codec’ by Sorenson or VP6 codec by On2?

c) Which audio codec does flash use?

Many Thanks,

essaeyu
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    4 replies

    Melvin_Draco
    Inspiring
    August 8, 2006
    a) I don't know.

    b) Both. The previous version of FLV uses "Spark Codec" and the last one "VP6 codec by On2". You can provide video encoded with the Sorenson Spark codec
    to clients with Flash Player 7 and video encoded with the On2 VP6 codec to clients with Flash Player 8.

    c) Flash Player 6 and later also includes a built-in Speech codec, specifically added for streaming live audio. The Speech codec is the only audio codec available for live streaming audio from the Flash Player.
    JarredN
    Participant
    August 8, 2006
    I am under the impression that by default, FMS2 will use the Sorenson codec for captured/recorded video in its .flv files. I am trying to instead capture video through FMS2 using the On2 codec. How/where can I change this configuration setting? I went through all of the .xml configuration files in the "conf" subdirectory under the FMS2 installation folder. To my disappointment, I was unable to find any setting to do this.

    Can someone help? Thanks!
    Anonymous
    August 8, 2006
    Unfortunatly you won't be able to encode live On2 video with FMS alone. The only product able to do it is On2 Live SDK, because on2 is propietary from this company. You can encode on-demand video with on2, but for live video you need this additional product.
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