Audio-visual out of sync in FCP only
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From: Martin S Taylor on 23 Feb 2010 08:07 I have a .dv file which plays properly in QuickTime Player, but when I play it in Final Cut Pro the audio is significantly out of sync. How is this possible? Martin S Taylor
From: Elliott Roper on 23 Feb 2010 10:25 In article <0001HW.C7A9838E003FC6D2B01029BF(a)text.news.virginmedia.com>, Martin S Taylor <mst(a)hRyEpMnOoVtEiTsHm.cIo.uSk> wrote: > I have a .dv file which plays properly in QuickTime Player, but when I play > it in Final Cut Pro the audio is significantly out of sync. > > How is this possible? How is your external video configured? Where are you watching? Where are you listening? See p 1885 of the FCP 7 User Manual " If you�re using external speakers connected to a camcorder, deck, or third-party capture card, and external video is set to All Frames, the video displayed on your computer�s monitor (from the Viewer or Canvas) will not be in sync with the audio. The audio will instead be in sync with the video that is displayed on the NTSC or PAL monitor that�s connected to the same output device." If you have a bizarre combination of output devices for external playback of audio and video, try setting FCP � System Settings � Playback Control � Frame Offset to a different value There are a few other suggestions blaming dropped frames in there too, but the above is the usual cause. I used to get that playing the audio out the Mac while watching the video via Firewire and the camcorder. (The opposite set-up from the Manual's example) My DV camcorder has now died so I have no way of checking whether I remember it right. -- To de-mung my e-mail address:- fsnospam$elliott$$ PGP Fingerprint: 1A96 3CF7 637F 896B C810 E199 7E5C A9E4 8E59 E248
From: Martin S Taylor on 23 Feb 2010 13:02 Elliott Roper wrote > In article <0001HW.C7A9838E003FC6D2B01029BF(a)text.news.virginmedia.com>, > Martin S Taylor <mst(a)hRyEpMnOoVtEiTsHm.cIo.uSk> wrote: > >> I have a .dv file which plays properly in QuickTime Player, but when I play >> it in Final Cut Pro the audio is significantly out of sync. >> >> How is this possible? > > How is your external video configured? Where are you watching? Where > are you listening? See p 1885 of the FCP 7 User Manual I only have FCP 5 User Manual; can you give me a section heading or something? > " If you�re using external speakers connected to a camcorder, deck, or > third-party capture card, and external video is set to All Frames, the > video displayed on your computer�s monitor (from the Viewer or Canvas) > will not be in sync with the audio. The audio will instead be in sync > with the video that is displayed on the NTSC or PAL monitor that�s > connected to the same output device." > > If you have a bizarre combination of output devices for external > playback of audio and video, try setting FCP � System Settings � > Playback Control � Frame Offset to a different value This doesn't sound likely; I'm just playing the clip through SoundSticks and watching it on the iMac screen. However... > There are a few other suggestions blaming dropped frames in there too ....this is extremely likely, since the clip was captured onto a very big, but very slow-to-write disk. It's quite likely that frames have been dropped, and if enough of them have gone, then that explains things, I suppose. I'm still baffled that a clip can play properly in QT Player but be out of sync in FCP, but there you go. Thanks, Elliott. MST
From: Elliott Roper on 23 Feb 2010 16:55 In article <0001HW.C7A9C8A4004FF7FEB01029BF(a)text.news.virginmedia.com>, Martin S Taylor <mst(a)hRyEpMnOoVtEiTsHm.cIo.uSk> wrote: > Elliott Roper wrote > > In article <0001HW.C7A9838E003FC6D2B01029BF(a)text.news.virginmedia.com>, > > Martin S Taylor <mst(a)hRyEpMnOoVtEiTsHm.cIo.uSk> wrote: > > > >> I have a .dv file which plays properly in QuickTime Player, but when I > >> play > >> it in Final Cut Pro the audio is significantly out of sync. > >> > >> How is this possible? > > > > How is your external video configured? Where are you watching? Where > > are you listening? See p 1885 of the FCP 7 User Manual > > I only have FCP 5 User Manual; can you give me a section heading or > something? I had a quick look in my old hard copy FCP 5 manual The index at the back of Vol 4 is useful. Frame offset is discussed on V1 p 220. I think it is worth playing with that setting. > > > " If you�re using external speakers connected to a camcorder, deck, or > > third-party capture card, and external video is set to All Frames, the > > video displayed on your computer�s monitor (from the Viewer or Canvas) > > will not be in sync with the audio. The audio will instead be in sync > > with the video that is displayed on the NTSC or PAL monitor that�s > > connected to the same output device." > > > > If you have a bizarre combination of output devices for external > > playback of audio and video, try setting FCP � System Settings � > > Playback Control � Frame Offset to a different value > > This doesn't sound likely; I'm just playing the clip through SoundSticks and > watching it on the iMac screen. However... > > > There are a few other suggestions blaming dropped frames in there too > > ...this is extremely likely, since the clip was captured onto a very big, but > very slow-to-write disk. It's quite likely that frames have been dropped, and > if enough of them have gone, then that explains things, I suppose. > > I'm still baffled that a clip can play properly in QT Player but be out of > sync in FCP, but there you go. So am I. Dropped frame is a dropped frame. In the old days I always captured batch with it set to abort after any dropped frame. That's why I think your offset is not well matched to your hardware. My FCP 7 offset is set to +4. I have a sneaking suspicion it copied from my old FCP settings. I no longer use DV so I can't do the obvious test. It is trivial to see if a different setting improves your lip sync. > > Thanks, Elliott. > > MST > -- To de-mung my e-mail address:- fsnospam$elliott$$ PGP Fingerprint: 1A96 3CF7 637F 896B C810 E199 7E5C A9E4 8E59 E248
From: Martin S Taylor on 23 Feb 2010 17:47
Elliott Roper wrote >> ...this is extremely likely, since the clip was captured onto a very big, >> but >> very slow-to-write disk. It's quite likely that frames have been dropped, >> and >> if enough of them have gone, then that explains things, I suppose. >> >> I'm still baffled that a clip can play properly in QT Player but be out of >> sync in FCP, but there you go. > > So am I. Dropped frame is a dropped frame. In the old days I always > captured batch with it set to abort after any dropped frame. I had a play around, and I dunno. My offset is set to 4, as seems standard. Downloading to a fast disk, this is fine, but when I download footage to the slow disk, the occasional frame is dropped. This much is clear. It also accounts for a possible slight mis-sync when I play the .dv file back using QT player, but it's hard to see. What is odd is that there's a *huge* mis-sync when I play it back using FCP. But as I say, downloading the footage to a fast disk makes the problem go away. So that's what I'm doing while I'm as busy as I am at the moment - I may have a poke around when I have some time to spare. ______ While you're there, as it were, the (FireWire) camcorder normally works fine, but sometimes it locks up and is ignored by programs which should be able to access it. FCP, QT 7, QT (new) can all see it, but none of them will import from it. The new QT Player, for instance, just displays a yellow triangle when I set it to record from the camcorder. Is there a way I can force a reset without rebooting the computer? Cheers, MST |