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iPhone 3Gs audio drift in Final cut Pro (but not qt player or imovie)

1898 Views 13 Replies Latest reply: Oct 1, 2009 8:07 PM by Denis Quinn RSS
clanky Calculating status...
Currently Being Moderated
Aug 18, 2009 8:10 AM
Is anyone else having audio drift issues with video from the 3gs when imported into FCP? We find that a 30 minute clip plays just fine in Quicktime player with perfectly synced audio, but when brought into final cut pro the clip has several seconds of drift over thirty minutes. This is before it's ever placed into a timeline, and the issue persists even if we transcode to prores 4:4:4 or any other codec. Issue duplicated in FCP 6 and 7.

Also, the movies are often brought in upside-down, even though they are displayed perfectly by quicktime player.

If, however, I bring the same clip into imovie and export it, the resulting clip has perfectly synced audio which works fine in FCP.

Essentially, apple's free tools seem to have no problem with iphone-captured video, but Final Cut, which is the pro tool, seems to have issues. Unless I'm missing some obvious (or abstruse) configuration step which is causing the problem.

Any insight greatly appreciated; everyone in our shop is stumped.
Macbook Pro, Imac 24", Mac OS X (10.5.8), FCP 6 and 7
  • David S. Level 7 Level 7 (20,630 points)
    Is there some limitation that iMovie has for your production from the iPhone?

    Or some benefit afforded by FCP that will enhance the film?
    MacPro 2.66Ghz 5 Gbs RAM, Mac OS X (10.5.4), ATI3870 512 MBs RAM - Three Seagate ST3500320AS
  • Shane Ross Level 8 Level 8 (41,655 points)
    apple's free tools seem to have no problem with iphone-captured video, but Final Cut, which is the pro tool, seems to have issues. Unless I'm missing some obvious (or abstruse) configuration step which is causing the problem.


    You seem to be missing the fact that FCP is a PROFESSIONAL app...no, you got that right....but the iPhone is the FARTHEST away from a professional camera you can get. It records to H.264 and that is NOT an editing format.

    Use Compressor to convert it to DV.

    Shane

    MacPro Octo 3.0Ghz, 4GB RAM, ATI x1900XT, Matrox MXO2,, Mac OS X (10.5.5), FCP 6.0.5, HD One, Dark Tower Raid - FCP forum elitist.
  • Jim Cookman Level 7 Level 7 (23,435 points)
    The normal workflow would be to shoot with a decent or better camera and audio, edit in FCS and compress for iphone/ipod or whatever. Not the other way around!
    G5 quad, 6 gigs, 2x500, nvidia 7800, 2.5TB Brian Conner Special, couple g-raids,, Mac OS X (10.4.5), 4 other macs, various. 2 minute walk to the beach elitist..
  • Nick Holmes Level 7 Level 7 (29,805 points)
    The iPhone shoots MPEG 4 so you are going to have to convert it to something else in any case.

    clanky wrote:
    If, however, I bring the same clip into imovie and export it, the resulting clip has perfectly synced audio which works fine in FCP.


    There ya go. Use the right tool for the job.

    clanky wrote:
    In short, this is clearly a bug...


    How exactly? Apple has never claimed that Final Cut Pro works with MPEG 4, only that it works with the majority of industry standard and some proprietary editing formats.
    Mac Pro 8 Core/Mini/3ACDs, Mac OS X (10.5.8), FCP forum elitist
  • Shane Ross Level 8 Level 8 (41,655 points)
    For the record I have shot with the iPhone 3G(S), and I have converted it to DV/NTSC and I have edited it and posted it on the web...with FCP. NO sync issues. So something must be wrong on your end.

    the issue persists even if we transcode to prores 4:4:4 or any other codec.


    ProRes 4444? Why are you throwing this mini-scooter format at a film finishing codec? That is way overkill.

    It's a somewhat ridiculous position to take that Apple's video tool would not support their only video-capable device.


    They do...with iMovie. Consumer device meets consumer editing application. BUT, I have also seen 2 music videos shot with the iPhone...both edited with FCP. So they got it to work too.

    Keep the frame rate 30fps...do not convert it to 29.97. The phone shoots 30...so try that.
    Shane

    MacPro Octo 3.0Ghz, 4GB RAM, ATI x1900XT, Matrox MXO2,, Mac OS X (10.5.5), FCP 6.0.5, HD One, Dark Tower Raid - FCP forum elitist.
  • Shane Ross Level 8 Level 8 (41,655 points)
    Currently Being Moderated
    Aug 18, 2009 11:54 AM (in response to clanky)
    The only consumer cameras that shoot 30fps solid, are camera phones and still cameras with movie mode. Even the Canon 5D MkII does this.

    All other cameras shoot at 29.97fps. This 30 straight FPS seems to be only affecting the still cameras and camera phones.

    Shane

    MacPro Octo 3.0Ghz, 4GB RAM, ATI x1900XT, Matrox MXO2,, Mac OS X (10.5.5), FCP 6.0.5, HD One, Dark Tower Raid - FCP forum elitist.
  • eugeniaMac Level 1 Level 1 (0 points)
    Hi Shane. I need urgent help. I've record some video with a Full HD Samsung camera. I want to edit with Final Cut Pro 6.0.4 this images and I tried every single setting and still doesnt work, I have to render it every time I drop a clip on the timeline or when I try to watch it on the viewer it has a lot of drop frames. Sorry for so many questions but I am a desperate editor hahahaah.

    Cheers

    Eugenia Perez
    Mac OS X (10.5.7)
  • David S. Level 7 Level 7 (20,630 points)
    Please stop thread jacking.

    This is your third post on your issue and it has nothing to do with the original post.
    MacPro 2.66Ghz 5 Gbs RAM, Mac OS X (10.5.4), ATI3870 512 MBs RAM - Three Seagate ST3500320AS
  • Denis Quinn Calculating status...
    Hi Guys,

    I have related question. Been reading all the Canon 5D info and have converted to ProRes422 so as to be able to edit my film.

    However converted from h.264 to APR 30FPS, native speed of camera, and didn`t force a change into 29.97 when using MPEGstreamclip to do this conversion.

    QUESTION: Can I just make a duplicate of the Apple ProsRes video settings and use a 30 FPS sequence or will this be problematic to output to NTSC DVD? Should I re-convert h.264 to Apple ProRes at 29.97?

    Cheers
    G5 Dual 2 Ghz, Mac OS X (10.4.6), macmini intel dualcore

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