Same here. Trying out Logic X on a few different setups:
4-core Mac Pro with one 27" Cinema Display monitor: no video lag (by lag I mean, when you press play it takes 1-2 seconds to actually start playing)
Mac Pro (3.33 ghz 6 core) with two 30" monitors, 5770 card: some lag, not consistently, like every 3rd or fourth time.
Mac Pro (3.33 ghz 6 core) with two 30" monitors and 42" TV (HDMI), 5770 card: consistently lags. The strange thing is that we unhooked the TV to test it, but the lag did not go away.
OS is 10.8.4, Logic X 10.0.1 on all three. All three have solid state boot drives, session running from boot drive. I hope they fix this soon. I think it's to do with Logic using the newer Quicktime engine.
Does anybody think a more powerful video card, such as the EVGA GeForce GTX 680, might fix this issue?
I think it is more likely to be some 'dud' Quicktime code somewhere.. causing a conflict with LPX as others have mentioned this issue when it still works fine in LP9
It might be related to this issue...
and maybe this in some way...
The first link says to check QTKit activity and delete other movies in the same folder (which seems weird - why would other movies not loaded in Logic have any effect?)
I checked and QTKit shows 0% CPU, so it's not that.
We "clean" our movies to a very strict standard (H.264, AAF audio), I will have to experiment to see if there is a better format for Logic. But I think it's related to the number of monitors and the graphics card can't handle it - although L9 could. So the question remains, would a more powerful graphics card help? I know that Core Video does some processing and buffering on the GPU, so maybe that is being done differently than L9?
I tried a bunch of things:
Tried every possible combo of audio and video prefs, no difference.
deleted all fade files automation data: lag disappeared but came back after about 15 start/stops
deleted all audio, but not the movie: lag disappeared (as expected I guess)
disabled all plugins by disabling core audio: lags less but still lags, which is weird.
deleted all non-VI plugins one by, still lags
Opened Quicktime X and exported the move as "iPod, iPhone 4, and AppleTV (m4v): still lags
Opened Compressor and exported as "SD for Apple Devices" : NO LAG!!!!
However, I also made a new empty file and imported the session into that, with the old version of the movie, also no lag.
So there is something weird in my autoload, but it's how it interacts with the codec.
According to a tame 'techie' I know.. there are a lot more 'under the hood' changes to LPX than meets the eye and might be apparent.... He noted there seems to be a lot of changes made to the GUI routines, the use of Cocoa, the codec related stuff.. and other graphics related code..so bearing in mind all that... and the fact that LPX is still very 'zero day' .. Im not really that surprised that there will be some bizzare behaviour and bugs around..... and I have no doubt that at some point.. these weird little bugs will be worked out (hopefully)...
Thanks for the info however.. I'll add all that to my own notes... in case one of my clients has a similar issue.
More info on this:
Seems to be a problem with all recent versions of Logic X (up to 10.0.2 anyway). Not limited to setups with only one monitor.
Converting from the Quicktime video to m4v with Compressor 4 to "SD for Apple devices" format seems to help a lot but doesn't completely get rid of the problem. Seems to me it's a bug.
I'm having the same problem, and it's driving me nuts. I'm scoring a major TV series, and this is absolutely not "pro". I have never had problems with video in Logic, and I've been a user since 2004. It's unbelievably silly and I feel a bit silly myself for having upgraded before waiting a year which is usually what I do with anything Apple related.
Basically, I have the same problem as everyone else in the above forum.
I'm having this problem too.I spent about 3 days making a Logic X template to start scoring a BBC drama series.The video stuttered and slowed down the whole system. I went back to 9 - the video worked perfectly.I concluded X is just not a pro application for working to picture. There were also other glitches - in the piano roll editor a very useful feature is being able to move notes while the picture scrubs - handy for hitting specific events. In X the video didn't scub. I'm back to 9, happily scoring away, but apprehensive about moving to X now.
I've been having the same problems.
I extracted the original audio track, which appeared to be in 44kHz, and imported it as a independant audio track (converted to 48kHz) and I can now work to the film just fine.
No stuttering or skipping.
No idea if the sample rate was fighting somewhere between the original track and the 48kHz Logic project - but it's provided a basic workaround, and I can get on with the work.
I can't believe the original post for this was back in July and it still hasn't been sorted out. I teach at an FE college and we have upgraded to X and the students have started several projects that won't be back compatible. Why don't Apple Beta test like all the other software companies? I don't want to spend over 2500 pounds on upgrades and then find I have have to go back to Logic 9 because Apple can't sort out this problem. They need to stop concentrating on GarageBand and sort out the professional software first.