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better way to reduce my video sizes

562 Views 6 Replies Latest reply: Dec 27, 2012 7:24 AM by sampan RSS
sampan Level 1 Level 1 (10 points)
Currently Being Moderated
Dec 25, 2012 8:07 AM

merry christams


i have FCPX and Compressor installed. I created a custom setting in Compressor and hopefully

this will reduce my video size as much as possible but still retain a good resolution. the final filesize

is still big. in my about 30min video 1440x1080, i converted to 1280x720 with H.264 setting (between

medium and high quality), the filesize ended up about 500MB.


I want to make it smaller than that. I tried Compressor's default YouTube setting but the filesize ended up

bigger than 500MB. Just wonder if I should keep H.264 or MPEG4. Instead of adjusting to lower quality,

what else can I do?


Any suggestions?


Final Cut Pro X, Mac OS X (10.6.8)
  • Russ H Level 6 Level 6 (12,920 points)
    Currently Being Moderated
    Dec 25, 2012 9:06 AM (in response to sampan)

    Generally speaking, you control size by choice of codec, frame size, frame rate, and/or bit rate. There is – of course – a trade off between size and quality.


    I think you will get the most useful advice if you tell us what you intend to do with this movie. Do you need to upload it to a Web video service like YouTube?




  • Russ H Level 6 Level 6 (12,920 points)
    Currently Being Moderated
    Dec 26, 2012 4:10 PM (in response to sampan)

    sampan wrote:


    Am I doing right?


    Hi Sampan.


    Hard to say; you have to take into account the  quality. How does it look? Does it play smoothly? 


    Without knowing about your system details, there are a couple of things that are probably dragging out the processing time: 1) resizing and 2) de-interlacing.


    If I take an h264 file (or a Pro Res 422) and lower the data rate for Web distribution it takes about 2X real time to compress. That is, a 15 minute file takes about 30 minutes without using clusters. (That's on a 3 year old 5i iMac – not exactly state of the art hardware.) So all things equal I would expect your 30 minute to be re-compressed in an hour or less on  my system.


    But de-interlacing in Compreesor is time-intensive. The good news is it does a good job. The bad new, you already know. If you have the option, shoot progressive.


    Tghe resizing issue is a bit complicated. The camera shot an anamorphic (non square) pixel shape. Web services want square. I guess I would re-size to 720P using square pixels.


    But do yourself a favor and do a test with a small section of your movie before committing to  a setting.


    Good luck.



  • Russ H Level 6 Level 6 (12,920 points)
    Currently Being Moderated
    Dec 27, 2012 6:59 AM (in response to sampan)

    Glad it's working – in a matter of speaking, that is.


    You're right that the hardware is a llimiting factor. The CPU will determine the rendering speed. (Are you running a Core Duo or Core 2 Duo? Because the Core Duo actually isn't supported by FCPX.)


    Again, one thng that would speed things up at lot  is to shoot pregressive any time you have the choice - eliminating the de-interlacing step, as well as the need to use Frame Controls.


    Good luck.




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