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Forums Compression Techniques An H.264 encoded file suitable for both podcasting and streaming

  • An H.264 encoded file suitable for both podcasting and streaming

  • Marc Morel

    January 27, 2008 at 1:32 am

    Hi All,

    H.264 / Podcast newbie here so this might either be real basic or real “undoable”.

    First, if I understand correctly, H.264 is the codec and it can be “wrapped” in either an mp4, an m4v or a mov file. Is this correct?

    Second, I have a bunch of 2-5 minute talking head video interviews to put up on a web page. Is there a preferred “wrapper” for streaming? Is there one for podcasting? And is there a format that would serve both purposes equally well? A format I could compress once and have the file be either viewed directly from a web page or available as a podcast.

    Hope this makes sense, thanks in advance for any insights or advice you may have,


  • Ben Waggoner

    January 27, 2008 at 11:55 pm

    I’d say go for .mp4 – that’ll work in the broadest variety of devices.

    However, there really isn’t a good hybrid for streaming/podcasting, since podcasting should be VBR and streaming CBR. Also, a streaming .mov/.mp4 needs hint tracks, which increase the file size for downloads. So, better to do two different encodes for the two scenarios. Also, podcasts tend to be at too high a data rate for streaming.

    My compression blog:

    My compression class at Stanford:

  • Marc Morel

    January 28, 2008 at 1:10 am

    Hi Ben,

    I had forseen the hint track difference but the VBR/CBR and data rate differences definitely point to 2 separate encodes.



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