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Oliver Peters
FCPX bug
on Apr 28, 2018 at 8:58:12 pm

Weird bug in current version.







This gap issue of less than a frame has been with FCPX on and off since the beginning.

- Oliver

Oliver Peters - oliverpeters.com


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Jared Ewing
Re: FCPX bug
on Apr 28, 2018 at 10:57:38 pm

Good find and thank you for posting this video. Have you submitted this bug to Apple?

https://www.apple.com/feedback/finalcutpro.html

- Jared
@FinalCutProHelp


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Bret Williams
Re: FCPX bug
on Apr 29, 2018 at 1:08:07 pm

Strange. I’ve never seen this or heard of it in 6 years. Does this happen if the files are replaced with FCPX closed? You’re not really supposed to be replacing files like that with the app open. It usually works but I wouldn’t rely on it.

_______________________________________________________________________
http://BretFX.com FCPX Plugins & Templates for Editors & Motion Graphics Artists
Hang Tag http://bretfx.com/product/hang-tag
Overshoot Text http://bretfx.com/product/overshoot-text/
Outliner http://bretfx.com/product/outliner/
Clock Maker http://bretfx.com/product/bretfx-clock-maker/


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Oliver Peters
Re: FCPX bug
on Apr 29, 2018 at 3:37:07 pm

[Bret Williams] "Strange. I’ve never seen this or heard of it in 6 years. Does this happen if the files are replaced with FCPX closed?"

I didn't encounter this originally. The video is from a thread on FCP.co. However, I have seen this "less than 1 frame" timeline issue on and off with stills in FCPX since the very beginning. It's one of those ongoing bugs that never quite seems to get fixed. And isn't there in every case.

- Oliver

Oliver Peters - oliverpeters.com


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Simon Ubsdell
Re: FCPX bug
on Apr 29, 2018 at 3:49:00 pm

[Oliver Peters] "However, I have seen this "less than 1 frame" timeline issue on and off with stills in FCPX since the very beginning."

"Beware the zero length gap!"

https://forums.creativecow.net/readpost/344/2772

A post from seven years ago ...

Simon Ubsdell
tokyo productions
hawaiki


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Bret Williams
Re: FCPX bug
on Apr 29, 2018 at 8:09:08 pm

Never seen nor heard of it to now. Bizarre. And I'm on the net, always.

_______________________________________________________________________
http://BretFX.com FCPX Plugins & Templates for Editors & Motion Graphics Artists
Hang Tag http://bretfx.com/product/hang-tag
Overshoot Text http://bretfx.com/product/overshoot-text/
Outliner http://bretfx.com/product/outliner/
Clock Maker http://bretfx.com/product/bretfx-clock-maker/


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Jeremy Garchow
Re: FCPX bug
on Apr 29, 2018 at 8:32:46 pm
Last Edited By Jeremy Garchow on Apr 29, 2018 at 10:00:04 pm

This happens if you have a 25 or 50 FPS clip in the secondary, and you overwrite it to the primary. The primary storyline will shift time when it should just overwrite and and keep time of all the clips surrounding it.


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Simon Ubsdell
Re: FCPX bug
on Apr 29, 2018 at 2:41:45 pm

[Oliver Peters] "This gap issue of less than a frame has been with FCPX on and off since the beginning."

See also my thread above.

https://forums.creativecow.net/readpost/335/101270

It's my (unverified) feeling that timeline timing has been a weak point of the FCP X model since the beginning, showing up in a number of different issues.

Simon Ubsdell
tokyo productions
hawaiki


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bob kimberly
Re: FCPX bug
on Apr 29, 2018 at 3:37:20 pm

just wanted to know if those clips are actually stills....I have 2 thoughts on this...firstly, the images could be of slightly different sizes which may cause a gap, but more importantly if the media is a still or jpeg you have to remember that stills don't have any field dominance like an actual video clip would....
I have only seen this on occasion when I was using media of different sizes or formats (eg: 720p and 1080i) pushed up against each other if the main project setting was drop frame at 30 fps. or a jpeg of a size larger than the timeline setting....(2000 x 1700 on an hd timeline)...
have you tried to convert the stills to video then import them...I found this method worked.


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Jeremy Garchow
Re: FCPX bug
on Apr 29, 2018 at 4:13:05 pm

I think, and this is a guess, that is has to do with mixed time base. FCPX isn’t particularly fantastic with this process, and the way it counts frames is almost too accurate, in that it calculates too far in to subframes. Subframes are find for audio, but not video. Somehow, the timing gets screwed up and the video does not rest on whole frames anymore, but somewhere in between, and the interface doesn't correct for this anomaly.

All still frames are brought in at "60p". If you timeline is anything other than 60p, these little glitch frames occur. It doesn’t happen with clips without dissolves because there’s been no recalculation of time.

I don't have hard evidence for this, it is just a hunch.


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Simon Ubsdell
Re: FCPX bug
on Apr 29, 2018 at 5:26:48 pm
Last Edited By Simon Ubsdell on Apr 29, 2018 at 6:56:55 pm

[Jeremy Garchow] "I don't have hard evidence for this, it is just a hunch."

It's a good theory certainly.

However, to be pedantic, I don't think it's right to say that FCP X uses frames (or samples) to count with, at least not directly. Instead it uses seconds and fractions of seconds based on the timebase of the sequence.

Thus the duration of a clip that's 37 frames long in a 25p sequence is expressed as: 3700/2500s. A clip that's 45 frames long in a 30p timeline is expressed as 22500/15000s. And so on.

<asset-clip name="DZ Counter" offset="4s" ref="r2" duration="3700/2500s" tcFormat="NDF"/>

Simon Ubsdell
tokyo productions
hawaiki


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Jeremy Garchow
Re: FCPX bug
on Apr 29, 2018 at 8:34:41 pm

[Simon Ubsdell] "Thus the duration of a clip that's 37 frames long in a 25p sequence is expressed as: 3700/2500s. A clip that's 45 frames long in a 30p timeline is expressed as 22500/15000s. And so on."

Yes, this is what I am taking about. As always, you say it much better than I. ;)


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