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AVCHD recording misses audio on 7-8 last frames

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Old 25-05-2012, 1:11 AM   #1
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AVCHD recording misses audio on 7-8 last frames

Hi All

I am having an issue with recording AVCHD video on a Panasonic FZ150...

For some reason, the sound of the last 7 or 8 frames seems to be missing when making longer recordings and files need to be split up due to the 4GB file-size limit.

Does anyone know how to correct this?

Thanks,
Peter
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Old 25-05-2012, 1:42 AM   #2
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Welcome,
- sorry I don't know this camcorder, but you are talking about 1/2 second only - is that such an issue? Traditionally, the cameraman always let the camera run after "Cut" just to be sure he wasn't too quick which might cut the sound-track.

In the same way he started before "Action" and shouted "Running" to confirm it was up to speed and the film was indeed running... only then does the Director shout "Action"

The 4G limitation has been mentioned before - it's there and "we" have to work arround these inconveniences. I believe it's due to the file-format.

Last edited by 12harry; 25-05-2012 at 1:45 AM.
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Old 25-05-2012, 1:50 AM   #3
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Quote:
Originally Posted by 12harry View Post
Welcome,
- sorry I don't know this camcorder, but you are talking about 1/2 second only - is that such an issue? Traditionally, the cameraman always let the camera run after "Cut" just to be sure he wasn't too quick which might cut the sound-track.

In the same way he started before "Action" and shouted "Running" to confirm it was up to speed and the film was indeed running... only then dies the Director shout "Action"

The 4G limitation has been mentioned before - it's there and "we" have to work arround these inconveniences. I believe it's due to the file-format.
Hi!

I am talking about a longer continuous recording of over an hour or so. The weird part is that video is not showing any missing parts, just audio.

Half a second (even less) is just quite annoying in recording of music...

Regards,
Peter
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Old 25-05-2012, 2:26 AM   #4
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Such effects are probably considtent with the process Mfrs use in the camera . . . I suspect you don't have a "fault" merely discovered yet anoy=ther limitation.

Yep, sure it's annoying to lose anything, but you have to watch the battery-level - now there is something else to check.
Personally I try not to run for more than 10 mins, just in case a file is corrupted. A second FZ150-camera should fix this and provide a different viewpoint, which helps make the vid "interesting" - but I'm sure you know this.
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Old 25-05-2012, 10:22 AM   #5
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Providing a seamless video as the camcorder generates new files and dropping the audio sounds like a serious bug to me

They got the hard bit right but lost the audio ?

Workaround of course is record a second copy of the audio using a external audio recorder.
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Old 02-06-2012, 9:38 AM   #6
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Hi All,

Since my last post I have been in (frequent) contact with the Panasonic Servicedesk. Although very helpful, I had great problems getting the the Panasonic employees to understand what is the problem. However, the last lady I spoke to escalated the issue, and I need to call them back on Monday.

I do agree with Graham (post above this one) that is seems to be a bug, not a limitation of some kind. If they can do seamless video, audio should be seamless too.

Buying a second camera is not an option, and for the kind of recording (event registration might be a better word) it would not add something.

Also, normally I do record audio on a separate device, and thanks to avforums member Rogs I know how to align the audio with video However, while I was doing the recording that showed me the issue, I simply had no time to set up the separated system as I was late getting at the location as I was directed to a different church :-)

Anyway, just an update... If anything comes from Panasonic's escalation I will post whatever info I get; maybe it can help someone else as well.

Regards,
Peter
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Old 04-06-2012, 1:21 AM   #7
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Good luck for the reply - however, I wonder if the "problem" isn't a playback issue?

(Are you playing this clip on a PC? - if not, then it's an issue as you describe...)
The only real way to test a clip (or an EDit for that matter), is to burn a DVD and watch it on a dedicated DVD player and TV . . . relying on a PC to maintain Lip-Sync is risky and my own has a habit of screwing up the ends of the last clips in a short movie. I'm believing this is not an issue when burnt to DVD.
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