Sound out of sync at DVinfo.net

Peter Lataster · May 23rd, 2007, 08:25 AM

Has anyone encountered this problem? Some shots, while shooting 720/25 with a 110 are out of sync, three or four frames. It never happens on the first shot of the tape but then, after every re-start of the camera sound is not in sync anymore. I would be gratefull for any info on this strange phenomenon.
We work on a G4, 1.25.

Brian Luce · May 23rd, 2007, 11:08 AM

Quote:

Originally Posted by Peter Lataster

Has anyone encountered this problem? Some shots, while shooting 720/25 with a 110 are out of sync, three or four frames. It never happens on the first shot of the tape but then, after every re-start of the camera sound is not in sync anymore. I would be gratefull for any info on this strange phenomenon.
We work on a G4, 1.25.

Are you sure it's the camera and not the NLE?

Tim Dashwood · May 23rd, 2007, 11:26 AM

This is a result of the way you captured the media. I assume you captured m2t files using HDVxDV, LumiereHD, or DVHSCap and converted with MPEG streamclip.
If this is the case it is important that you do not capture across start/stop breaks. Always start a new clip at every start/stop break or you will have sync issues.
If you capture with FCP5.1.x the clips will automatically be broken up to avoid sync issues.

If you really want to capture a whole tape in one go as one clip then you have to use a capture card or AJA ioHD style device.

Peter Lataster · May 23rd, 2007, 11:44 AM

Thanks Brian & Tim, for your replies. But the footage is captured with fcp 5.1.4, native hdv. We don't mind having different clips after every re-start of the camera but obviously we like to have sync sound. So it's still a mystery to us. Maybe a G4 ppc is not the right tool?

Gareth Watkins · May 23rd, 2007, 12:13 PM

Hi Pete

I've had this a few times importing HDV into PPro 2.... I get zero drop outs on the import, but it shows drops and audio going out of sync in the timeline....this despite me telling it to stop capture on dropped frames..

I'm just wondering if the editing software misses the long GoP drops with HDV... It shows up as an orange flash on the timeline... rather than the mosaic I'm used to in dropped frames.

I got round it on the one important clip by unlinking and manually syncing the video and audio...

Curiously when I import as DV downconverted in camera the drops don't show up...
Wierd...

Anyone else found this???

cheers
Gareth

Tim Dashwood · May 23rd, 2007, 12:20 PM

Quote:

Originally Posted by Peter Lataster

Thanks Brian & Tim, for your replies. But the footage is captured with fcp 5.1.4, native hdv. We don't mind having different clips after every re-start of the camera but obviously we like to have sync sound. So it's still a mystery to us. Maybe a G4 ppc is not the right tool?

If it is native then it makes no sense to me why the first clip would be fine and the subsequent ones would lose sync.

Did you capture to an external hard drive that is too slow? Maybe formatted as FAT-32?

I'll move this to the FCP forum where more FCP people may have some tips.

Pete Cofrancesco · May 24th, 2007, 04:16 PM

I've often found when the camera drops frames the audio goes out of sync. Its a pain to fix in the time line but it doesn't happen often, so you just learn to deal with it.

May 23rd, 2007, 08:25 AM	#1
Peter Lataster New Boot Join Date: Feb 2007 Location: Amsterdam, Netherlands Posts: 9	Sound out of sync Has anyone encountered this problem? Some shots, while shooting 720/25 with a 110 are out of sync, three or four frames. It never happens on the first shot of the tape but then, after every re-start of the camera sound is not in sync anymore. I would be gratefull for any info on this strange phenomenon. We work on a G4, 1.25.

May 23rd, 2007, 11:26 AM	#3
Tim Dashwood Wrangler Join Date: Aug 2005 Location: Toronto, ON, Canada Posts: 3,637	This is a result of the way you captured the media. I assume you captured m2t files using HDVxDV, LumiereHD, or DVHSCap and converted with MPEG streamclip. If this is the case it is important that you do not capture across start/stop breaks. Always start a new clip at every start/stop break or you will have sync issues. If you capture with FCP5.1.x the clips will automatically be broken up to avoid sync issues. If you really want to capture a whole tape in one go as one clip then you have to use a capture card or AJA ioHD style device. __________________ Tim Dashwood

May 23rd, 2007, 11:44 AM	#4
Peter Lataster New Boot Join Date: Feb 2007 Location: Amsterdam, Netherlands Posts: 9	Thanks Brian & Tim, for your replies. But the footage is captured with fcp 5.1.4, native hdv. We don't mind having different clips after every re-start of the camera but obviously we like to have sync sound. So it's still a mystery to us. Maybe a G4 ppc is not the right tool?

May 23rd, 2007, 12:13 PM	#5
Gareth Watkins Major Player Join Date: Feb 2004 Location: France Posts: 578	Hi Pete I've had this a few times importing HDV into PPro 2.... I get zero drop outs on the import, but it shows drops and audio going out of sync in the timeline....this despite me telling it to stop capture on dropped frames.. I'm just wondering if the editing software misses the long GoP drops with HDV... It shows up as an orange flash on the timeline... rather than the mosaic I'm used to in dropped frames. I got round it on the one important clip by unlinking and manually syncing the video and audio... Curiously when I import as DV downconverted in camera the drops don't show up... Wierd... Anyone else found this??? cheers Gareth

May 24th, 2007, 04:16 PM	#7
Pete Cofrancesco Inner Circle Join Date: May 2004 Location: USA Posts: 3,005	I've often found when the camera drops frames the audio goes out of sync. Its a pain to fix in the time line but it doesn't happen often, so you just learn to deal with it.