Compression

topic posted Wed, January 28, 2009 - 1:17 AM by  Chai
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Question: I'm currently exporting a short 2 minute project from FCP using Quicktime Conversion. It's ending up as a 2 gig file and I need it to be 1 gig so I can upload it to youtube.

Should I try to configure the conversion to reduce the file size (and if so, do you have any tips?) Or would I loose any quality if I simply ran it through Squeeze at this point?

Other info: 2 minute clip shot in HDV on a Cannon HV20, exporting from FCP using Quicktime Conversion H.264 Key frame every 24 best quality.
posted by:
Chai
Los Angeles
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  • Re: Compression

    Wed, January 28, 2009 - 2:38 PM
    Hey,

    There are a few things you can play with for compression - you can change the frame size - that's the most obvious - but if you want it the same size, try playing with the Data Rate.

    QT Conversion>Options>settings - under the Data Rate section - click "restrict to" and then start putting in numbers. 1500 is pretty high, but the lower you go the smaller your file size will get - of course the smaller you get the worse the quality. But if you play with it a bit you can find a sweet spot.

    But if you're shooting with HDV another solution is to convert it first to standard def (Compressor is good for this) - which will make a smaller file (just set the frame dimensions so that they're the same) and then compress that for YouTube.

    Those are just a few options. I'm sure there are more.
  • Re: Compression

    Wed, January 28, 2009 - 2:41 PM
    That's an outrageously large file for only 2 min. You need to choose some new settings.

    I put up a clip on YouTube, and using their guidelines for uploading (read 'em!), put up a 4-minute movie that was 303 MB in size at 640x480 using MPEG4 compression from FCP. Worked perfectly, and looks great.

    Remember, what you think are the best export settings are not necessarily the best export settings for YouTube. With tube sites, your output often needs to be closer to their end result after they recompress the file, or at least needs to be in specific formats that are optimized for their compression.
    • Re: Compression

      Wed, March 4, 2009 - 5:48 PM
      DV is one Gig per minute - so 2 Gigs for a 2 minute video is in line ;-)

      Anyway - play with "compressor" and "output using quicktime"

      and go to youtube to get the exact setting that they recommend.

      and 640x480 using MPEG4 is a good setting.

      And if you use "VisualHub" there is an advanced setting "fit to ..." a specific size...

      • Re: Compression

        Wed, March 4, 2009 - 9:38 PM
        MiniDV is not even close to one GB per minute. It's about 13 GB per HOUR (60 min. tapes have 13 GB capacity), which would be 1 GB equals about 5 min Even HDV files are roughly the same size.

        Look it up!


        • Re: Compression

          Thu, March 5, 2009 - 2:07 PM
          opps - I had DVCPro HD on my mind - which is 1 Gig per minute.....

          So, yes, the compression made the file bigger?

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