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Re: Anyone have any idea what causes this ?
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Re: Anyone have any idea what causes this ?


  • Subject: Re: Anyone have any idea what causes this ?
  • From: Jeff Moore <email@hidden>
  • Date: Mon, 12 May 2008 14:35:32 -0700

As I said in my other post, this rather unfortunately worded log message does not actually signify that an error has taken place. To my knowledge, it generally will come up when a second process has started using the same device as another process. The IOAudio family is specifically logging when the clip position had to be moved backward to accommodate starting the second process at a point in time that for the first process had already clipped.

I'd be surprised if this log message had anything to do with your synchronization problem.

On May 12, 2008, at 2:16 PM, Mark Gilbert wrote:

Occasionally when opening a QuickTime movie, we see this error in the console:

"IOAudioStream[0x42d2b00]::clipIfNecessary() - Error: attempting to clip to a position more than one buffer ahead of last clip position"

Following this there is a good chance the Audio and Video will play out of sync when we start playback of the movie.

Does anyone have any idea what this error might be caused by ? Its an environmental issue, not a bug or configuration problem.

We tend to see this at the same time that we notice the movie taking much longer to open. We are opening over an NFS network connection so we think both observations point to a network related issue.



--

Jeff Moore
Core Audio
Apple


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References: 
 >Anyone have any idea what causes this ? (From: Mark Gilbert <email@hidden>)

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