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Multicam is impossible

485 Views 27 Replies Latest reply: Jan 8, 2014 11:37 AM by Russ H RSS
  • Tom Wolsky Level 10 Level 10 (104,615 points)
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    Jan 8, 2014 7:59 AM (in response to markfrompluneret)

    Proxies are much smaller files. Depending on the formats you're using, they can be half resolution and they are more heavily compressed. Because they're much lower data rate than most formats multicam can handle more streams more easily.

  • Luis Sequeira1 Level 5 Level 5 (4,790 points)
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    Jan 8, 2014 8:11 AM (in response to markfrompluneret)

    They may be in ProRes 422 (Proxy) codec, and typically a quarter of the frame size - e.g. if the original is 1920x1080 the proxy may be 960x540 - that will make for much smaller file sizes.

  • Tom Wolsky Level 10 Level 10 (104,615 points)
    Currently Being Moderated
    Jan 8, 2014 8:11 AM (in response to markfrompluneret)

    They're in ProRes Proxy 422. Basically the same code more heavily compressed and half frame resolution. Optimized is PR422.

  • Luis Sequeira1 Level 5 Level 5 (4,790 points)
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    Jan 8, 2014 8:12 AM (in response to markfrompluneret)

    markfrompluneret wrote:

     

    What is it about proxies that makes them faster?

    because its a time and space investment.

     

    Or perhaps this needs another thread ...

     

    since if the issue is multicam its too late to build proxies and I only have 600 Gb left ...

     

    You may need to only create proxies for the clips used in the multicam, and since this is where you are feeling the problem, I guess it is worth a try. Do it for a small multicam clip and see how it goes.

  • Luis Sequeira1 Level 5 Level 5 (4,790 points)
    Currently Being Moderated
    Jan 8, 2014 8:28 AM (in response to markfrompluneret)

    You can STILL create and work with proxies in the current project...

  • Tom Wolsky Level 10 Level 10 (104,615 points)
    Currently Being Moderated
    Jan 8, 2014 9:26 AM (in response to markfrompluneret)

    There are many reasons why a clip might need to be rendered; not matching the project properties is one if them, and not uncommon when working in multicam where media from different cameras in different formats are often mixed.

  • Russ H Level 6 Level 6 (12,875 points)
    Currently Being Moderated
    Jan 8, 2014 11:37 AM (in response to markfrompluneret)

    markfrompluneret wrote:

     

    Well I'd like it to be good but I think with the volume I have

    it will take a lot of space and time if I elect to create them ...

    how could I estimate that ?

    Jumping back into this…

     

    I'd say figure on about 40 Mbps for Proxy. (That's bits per sec – not bytes.)

     

    Just to point out that you indicated you have 600GB for free space. There shouldn't be a problem – even with 4 streams. You can always trash them after you're finished cutting.

     

    Russ

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