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How to speed up rendering/ transcoding in FCPX

879 Views 2 Replies Latest reply: Nov 22, 2012 7:06 PM by Russ H RSS
PEC1 Level 1 Level 1 (0 points)
Currently Being Moderated
Oct 18, 2012 7:17 PM

It has just taken 8 (eight) hours to render then transcode two hours of video footage, before any editing.

I have two video clips from a Panasonic camera in .MTS form. (1920 x 1080)

To get them onto FCPX I used Handbrake to convert them to .mp4 files.

On FCPX import preferences, 4 items ticked, Copy file to event, Create opti media, Create proxy media, Analyze audio.

I also then clicked stabilization, on both clips.


Machine is a Mac Pro serial # YM******XYK with upgraded video card and 20g RAM (4x 4G +4x 1G)

Using OS 10.6.8

Using USB hard-drive to store original footage, but

onboard hard-drive for event and project


Activity monitor showed most of the time CPU's at 30% use 60% idle and RAM 7.7M used.  13M idle.

There was a short period when FCPX CPU at 750%, however RAM never went above 8M


I know best way to quicken render / transcode is buy a bigger computer,


However would like to know if I can get better % use out of CPU and RAM

It would appear that I did not need any more RAM above 8M, as machine appears not to use rest.


Also, I would like to know if I am bringing footage into FCPX, in the most efficient way.


PS, footage is of a hall presentation. Sound taken off camera mic and camera operator keeps moving / bumping camera. So need to analyze, then optimize both audio and video to make best of a bad shoot.


<Edited by Host>

Mac Pro, Mac OS X (10.5.8)
  • Russ H Level 6 Level 6 (13,015 points)
    Currently Being Moderated
    Nov 22, 2012 7:06 PM (in response to PEC1)

    A couple of comments.


    Don't render your timeline before exporting unless there is an effect that slows playback enough to interfere with editing decisions. If you export the unrendered TL, it will be a much faster process – all in – than rendering and then exporting.


    If you have the card structure intact you can import your AVCHD clips. If you only have the MTS files, you can use MPEG Streamclip and the Panasonic plug-in to convert to Pr Res.


    Don't convert to MP4; convert to a PR Quick Time and editing should go smoothly,


    Good luck.




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