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travelsheep

macrumors 6502a
Original poster
May 30, 2013
918
1,057
I upgraded to FCPX 10.4.7 (now at 10.4.10) and ever since rendering became unbearably slow. A simple 1080p movie (no generators) of 20 minutes now takes close to 30 minutes to render and write. Before it was just a few minutes (if I remember correctly around 10 minutes or less). Any tips?

MacOS Catalina 10.15.7
MacBook Pro 13" 2018 16 GB RAM
 

leonsquall

macrumors newbie
Sep 5, 2020
21
5
Indonesia
when i update the fcpx, it accidentally turn off background render, so when we finally render/export it will take longer, sometimes significantly longer if the project if longer, because all render is run when we exporting, if we have back ground render turn on, some rendering process already started when we edit video. but your library will significantly increase in size when we turn on background render. thats my experience. tq
 

AZhappyjack

macrumors G3
Jul 3, 2011
9,809
23,033
Happy Jack, AZ
when i update the fcpx, it accidentally turn off background render, so when we finally render/export it will take longer, sometimes significantly longer if the project if longer, because all render is run when we exporting, if we have back ground render turn on, some rendering process already started when we edit video. but your library will significantly increase in size when we turn on background render. thats my experience. tq

I have background render off because it interferes with editing in the timeline... background render causes regular, simple tasks in the timeline to become slow, stuttering and, frankly, makes FCPx impossible to use. I can render a 60-90 minute 1080p video with subtitles, some effects and transitions in about 15 minutes.
 

leonsquall

macrumors newbie
Sep 5, 2020
21
5
Indonesia
I have background render off because it interferes with editing in the timeline... background render causes regular, simple tasks in the timeline to become slow, stuttering and, frankly, makes FCPx impossible to use. I can render a 60-90 minute 1080p video with subtitles, some effects and transitions in about 15 minutes.

just to find possibility, may be he use background render before... now it turned off... it will face slow down in export, i don't compare do we have to turn background render or no... it your own preference, just stay in poster problem... why he fell render take longer than usual... may be usually he use background render now it turned off...
 

travelsheep

macrumors 6502a
Original poster
May 30, 2013
918
1,057
I have background render off because it interferes with editing in the timeline... background render causes regular, simple tasks in the timeline to become slow, stuttering and, frankly, makes FCPx impossible to use. I can render a 60-90 minute 1080p video with subtitles, some effects and transitions in about 15 minutes.

Are you kidding me?? I have a 16GB 2018 MacBook Pro 13" (with 220GB still free SSD drive). A simple 20 min 1080p video (video track from SONY A6400 on Auto, with some subtitles, some color corrections and half a dozen still images), takes 20-30 minutes to render.

Maybe I should uninstall/reinstall FCPX? I will do this right now... 15 minutes... wow!!
 

AZhappyjack

macrumors G3
Jul 3, 2011
9,809
23,033
Happy Jack, AZ
Are you kidding me?? I have a 16GB 2018 MacBook Pro 13" (with 220GB still free SSD drive). A simple 20 min 1080p video (video track from SONY A6400 on Auto, with some subtitles, some color corrections and half a dozen still images), takes 20-30 minutes to render.

Maybe I should uninstall/reinstall FCPX? I will do this right now... 15 minutes... wow!!

Not kidding. I've been doing this for about 6 years now... editing two or three 60-90 minute videos each week - some are 720p, most are 1080p ... some with color adjustments, lots of titles, transitions plugins, and in some cases, split screen effect with two concurrent clips... I don't recall a render ever taking more than 35-40 minutes... and, as I said, most are rendered in 15-20 minutes... Mac mini i7 w 32GB RAM, 1TB internal SSD, 1TB Samsung T5 SSD connected via USB-C as a scratch drive.
 

ColdCase

macrumors 68040
Feb 10, 2008
3,363
276
NH
Using SSDs for both library and destination will speed things up. My 2020 MBA does a simple 10 minute 1080p movie (cuts and transitions, maybe a couple text generators) in a minute maybe two. Source material may have slightly different resolution or frame rate depending on the number of cameras spliced together. I typically have both source and destination video data on the internal PCI SSD because I'm an immediate gratification type of guy thats also impatient :) . If the destination is an external USB SSD times can double.

Are your timeline, source and share resolution and frame rate the same? Translating between frame rates can slow things down, depending on several variables.

2020 MBA Catalina 10.15.7 1.2Ghz i7 16 GB RAM Iris Plus Graphics.
 
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