Unusual FCPX problem – red line in timeline render bar
I’ve been using FCPX continuously for paid work for 6 years, a slow adopter from 5 years with FCP Studio. I’ve encountered a problem not seen before, nor have I found it discussed on any forums. (Sorry for the long post but I wanted to provide as much description as possible.)
Recently updated a 2015 27″ iMac to Mojave 10.14.6 and also updated all Pro Apps including FCPX10.4.8. The problem is this:
After updating some older libraries thin red lines were visible in the timeline render bar above random clips, titles or transitions. Sometimes these clips play smoothly, sometimes they judder. Sometimes the clips export okay, sometimes the juddery playback or even a stalled frame is reproduced in the exported file. The red line can sometimes be made to disappear by placing a duplicate of the clip on the secondary storyline above the original or by moving a title, or by separating the audio track. But it may return later. The red line may also disappear if a colour adjustment is made, only to return later.
The timelines include all ProRes video files and the only consistency of this red line issue seems to be its randomness.
The red line phenomena also applies to new libraries created from scratch in projects with all ProRes video media. I’ve also noticed the project render routine itself is hit and miss, I usually disable background-render, now and then select all and manually trigger a render but portions of the timeline often refuse to render leaving the usual white dots.
I am at a complete loss to troubleshoot this any further. I’ve done all the usual routines – reset NVRAM, trashed FCPX prefs, trashed FCPX itself and reinstalled it, reinstalled Mojave, ran Disk Repair on the SSD system drive, tried copy/pasting a problem project from an existing library into a new library – the red lines just travel with the project. Also deleted all library and/or project render files to no avail – the red lines persist. There’s no apparent action in any aspect of the workflow that appears to induce the red lines nor can I find any reliable or repeatable way to eliminate them.
I now have such little confidence in FCPX’s ability to function reliably, as expected, that I would be reluctant to accept paid work with the app in this state. Even if there was any work to be had right now. ????
I’ve sent a description of the issue to Apple via the usual feedback support but I’m not really expecting a response. If anyone has any suggestions I’d be most appreciative.
Thanks for listening.
Independent producer, director, cinematographer, writer, editor
Milas Film Productions, Hong Kong