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H264 playback in Quicktime out of sync

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Peter Morris
H264 playback in Quicktime out of sync
on May 30, 2010 at 3:23:02 pm

Hi,

I've been encoding video in H264 with Quicktime Pro (Windows).

The issue is, the video plays back fine in players like VLC and others.

However, with playback in Quicktime (again on Windows), there is a very slight, but noticeable audio sync issue. The audio seems to be 3 or 4 frames ahead of the video.

I've search Apple's forums, even tried contacting them directly, but to no avail. It appears to be an on-going issue with the player.

I also tried encoding the video to .H264 with Main Concept, but the audio/video remain out of sync in Quicktime playback.

If anyone has any other insights or a fix, I'd appreciate it.

Thanks.


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Daniel Low
Re: H264 playback in Quicktime out of sync
on May 31, 2010 at 12:35:06 pm

Windows is generally crap with Quicktime. The only 'fix' is to move to OS X. Otherwise keep using VLC.

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Peter Morris
Re: H264 playback in Quicktime out of sync
on May 31, 2010 at 4:17:55 pm

So then, playback on Mac would be okay then? I don't have one to test on.

And is the feeling that this is pretty much an on-going issue with Windows Quicktime Player? That what it seems like...


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Daniel Low
Re: H264 playback in Quicktime out of sync
on May 31, 2010 at 4:54:32 pm

[Peter Morris] "So then, playback on Mac would be okay then?"

Impossible to say, but almost certainly.



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cowcowcowcow
Chris Blair
Re: H264 playback in Quicktime out of sync
on Jun 1, 2010 at 12:18:31 am

We've seen this on a lot of Windows computers with Quicktime (both free vesion and Pro). Best we've been able to find in doing searches is that Quicktime for Windows doesn't like a lot of Windows sound drivers and/or sound chips and cards. One fix we've seen is to go into the Quicktime settings from Control Panel and change the audio playback sample rate to 32khz instead of 44 or 48khz. This has synced audio back up on a number of systems. It has no effect on quality or anything other than changing how Quicktime is outputting the audio to your sound card and drivers.

Quicktime for Windows is very quirky, especially in how it handles audio.

Chris Blair
Magnetic Image, Inc.
Evansville, IN
http://www.videomi.com
Read our blog http://www.videomi.com/blog


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Daniel Low
Re: H264 playback in Quicktime out of sync
on Jun 1, 2010 at 12:29:36 am

Great tip!

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Peter Morris
Re: H264 playback in Quicktime out of sync
on Jun 1, 2010 at 1:10:11 am

Chris and Daniel, thanks a lot!

I really appreciate it!


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