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Forums Compression Techniques ProRes LT to H.264 in Compressor – How to reduce compression times?

  • ProRes LT to H.264 in Compressor – How to reduce compression times?

  • Josh Haggard

    July 30, 2011 at 1:32 am

    I am compressing a ProRes LT 720p30 sequence to H.264 using Ken Stone’s vimeo settings:

    The only changes I have made are:
    Data Rate: 2500 K/Bs
    Streaming: Fast start

    I am using MacBook Pro with 2.66Ghz Intel Core 2 Duo, 4GB RAM

    I also send the sequence straight to compressor from FCP.

    40 minutes of video takes around 5 hours to compress.

    Does anyone have any suggestions on how to reduce compression time?

    What are the limiting hardware features on compression times? Is it CPU/RAM/GPU?
    Would compression times be greatly reduced by buying a beefy Mac Pro?
    Any word on virtual clusters? Or even networkingmultiple Macbook Pro’s to use as a cluster?
    I have had mixed advice on exporting from FCP and then importing to compressor rather than using the ‘send to’ function – I am in the middle of a job so don’t want to experiment with my workflow at the moment.


  • Craig Seeman

    July 31, 2011 at 4:31 pm

    Many factors influence compression time. I’d say Core2Duo might be your weak link though.
    A MacPro would help.
    Clustering would help.
    A MacBookPro with Express port and Matrox MXO2Mini with MAX h.264 acceleration would help.
    Using single pass instead of multipass would help (but may impact quality).

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