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Netflix Audio/Video Out of Sync

My new AppleTV arrived today (yay!) and I quickly set-up and configured it. While generally impressed I'm observing that the audio and video for Netflix streaming are not synching up properly. I've got the ATV hardwired to my network and am not connecting via wireless.

I have both the HDMI and optical cables plugged in I've tried audio over both interfaces and with the ATV setting for "Digital Out" set to on and off and all variations have the same synch issue.

I've tested the same show with the Netflix app on my iPhone (over wifi) and using the OSX Silverlight player (hardwired) which both synch the audio/video properly.

Anyone else experiencing this? Did you find a solution?

Mac Pro 1,1 (w/ 2.33 E5345 & ATI 4870), Mac OS X (10.6.4)

Posted on Sep 30, 2010 1:28 PM

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64 replies

Oct 11, 2010 3:19 PM in response to Der Det

I have the same audio sync issues. I did not notice it with purchased movies, or netflix movies, only TV shows via netflix. I will have to go back and try a couple different movies, etc to see if I just missed it. (I doubt it, the sync is pretty far off... hard to miss unless you simply arent watching).

FWIW - I am using N wireless and going through an HDMI receiver. I will also try connecting directly to the TV, though it seems from other posts this will likely not improve things. I do not have an optical audio cable, but I may pick one up to try this route as well.

Hope we can find a solution soon.

-Kerry

Nov 23, 2010 4:59 AM in response to Der Det

I also have problems with audio sync. I was watching Stargate Universe (like a previous post). Worked fine on the Blu Ray connected to TV via HDMI, but was out of sync on Apple TV connected to the same TV through HDMI. Apple TV is on hard wired Ethernet. With the audio out of sync I kept expecting Godzilla to show up in a Stargate episode.

Dec 4, 2010 3:40 PM in response to Handyman65

I have also noticed the audio being out of sync with several episodes of Stargate Universe (rented on the new Apple TV from Netflix), which leads me to wonder if it isn't a problem with their encoding house. But I have also seen an audio sync problem with a Netflix rental of "Good Will Hunting" but that was sporadic throughout the entire movie.

Message was edited to clarify that the Stargate Universe episodes were rented from Netflix via the new Apple TV.

Dec 4, 2010 4:21 PM in response to Kevin Shawley

I should have done this test before posting my preivous reply. The Stargate Universe episodes that have audio out of sync when playing them from Netflix on the Apple TV are also out of sync when playing Netflix through my Playstation 3. So, it doesn't appear that the problem lies with Apple but instead lies with Netflix or the encoding house that prepared the episodes for them.

Dec 9, 2010 3:47 PM in response to Der Det

The audio sync problem has nothing to do with Netflix. A digital video signal goes through a lot of processing within your TV and is therefore delayed by a few frames. The optical audio signal is processed almost instantaneously by your DAC or receiver and arrives ahead of the video. Many A/V receivers have an audio delay feature to correct this problem. If your TV has an optical audio output, try feeding this to the DAC or receiver.

Dec 13, 2010 10:28 AM in response to Der Det

I bought the latest Apple TV this past SAT to hook up with my new LCD HDTV for the express purpose of streaming Netflix content as I was tired of hooking up my MAc Book Pro to my TV, opening up a browser etc. To my dismay, I have the exact same issues a lot of people are having, namely, a video/audio out-of-sync problem. I find it ironic that two posters here have had issues with the exact same content, i.e. StarGate Universe - the exact show I have been watching with NO issues using Safari, logged onto Netflix and hooked to my TV. And I mean NO issues - never a hiccup - perfect streaming and audio and video perfectly in synch (I have Comcast 22mbps downstream service).

However, trying to stream via Apple TV, the audio is at least 500ms behind the video. I've tried a few episodes and all have the same issue. I've not tried on other content. I have only hooked up the Apple TV with the HDMI cord. So, unless content is streamed differently from Netflix using the Apple TV vs my Mac Book Pro (which I seriously doubt) then it appears to me, that the issue lies with the Apple TV and not Netflix.

I am wondering if hooking up the Apple TV with the XtremeMac XtremeHD Toslink Audio Cable will make any difference.

So, until this is fixed, I am back to hooking up the old Mac Book Pro to watch streaming content...

Netflix Audio/Video Out of Sync

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