Safari HTML5 double audio delay Issue -- Solved

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growler62000 Author

Level 2

195 points

Safari HTML5 double audio delay Issue -- Solved

When playing a video on YouTube, mostly I would see a placeholder with “HTML5” & when I clicked it the video would start but, often there would be another audio track playing with a delay! So 2 audio tracks playing same audio out of synch!

I noticed if I did NOT click the “HTML5” -- the audio only would begin playing with no video or a still shot on the screen. If I clicked pause only the video & one audio track would stop & the audio only track would continue. Could not get both audio tracks to synch up!

Note: these videos played just fine on other browsers.

I searched & discovered this post by Carolyn which I followed & seems to have fixed it!

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Carolyn Samit

Level 10

Oct 30, 2013 12:34 PM

Re: Audio playback problems in Safari since Mavericks upgrade

in response to JohnnyLV

Open System Preferences > Flash Player then select the Advanced tab.

Click Delete All under Browsing Data and Settings

Not empty the Safari cache.

From your Safari menu bar click Safari > Preferences then select the Advanced tab.

Select: Show Develop menu in menu bar

Now click Develop from the menu bar. From the drop down menu click Empty Caches.

Now try a video.

https://discussions.apple.com/thread/5506319

iMac, OS X Mavericks (10.9.5), 4 GB RAM, G Drive 2TB HDD, Win XP Pro-Boot Camp

Posted on Oct 1, 2014 1:51 AM

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Answer 1

growler62000 Author

Level 2

195 points

Oct 1, 2014 4:38 AM in response to growler62000

Spoke too soon, not fixed! Happened again. Random Youtube Video.

I’ll watch videos on a different browser.

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Answer 2

Linc Davis

Level 10

209,739 points

Oct 1, 2014 2:17 PM in response to growler62000

While signed in to your YouTube account, load this page. You may see a link with the text "Leave the HTML5 Trial." If so, click that link.

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Answer 3

growler62000 Author

Level 2

195 points

Oct 2, 2014 12:11 AM in response to Linc Davis

I have not signed into my YouTube Account for months, Normally no need.

I’ll try it though.

OK, I signed in & then clicked your link, the page has not link that said: "Leave the HTML5 Trial."

YouTube HTML5 Video Player

Many YouTube videos will play using HTML5 in supported browsers. You can request that the HTML5 player be used if your browser doesn't use it by default.

If you encounter any problems, right-click on the player and choose "report playback issue", or let us know on the user support forums. Your feedback will help us continue to improve the player.

I saw 6 boxes with 2 checked; HTMLVideoElement & H.264

4 with red “!” ; Media Source Extensions, WebM VP8, MSW $ H.264 & MSE & WebM VP9

Below that was a yellow triangle & “The Default player is currently being used.”

Below that a blue rectangle highlighting: “Request the HTML5 player”

I was actually thinking the issue was related to Mavericks’ new feature that does not allow auto play video until you click in the video. I suppose I could try to turn that off but, I like the concept where you only see/hear video & use resources to play video when you decide to do so.

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Answer 4

growler62000 Author

Level 2

195 points

Oct 2, 2014 12:19 AM in response to growler62000

Can’t edit my typo, should read: the page has no link that said: "Leave the HTML5 Trial."

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Answer 5

Linc Davis

Level 10

209,739 points

Oct 2, 2014 7:48 AM in response to growler62000

From the Safari menu bar, select

Safari ▹ Preferences... ▹ Extensions

Turn all extensions OFF and test. If the problem is resolved, turn extensions back ON and then disable them one or a few at a time until you find the culprit.

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Answer 6

growler62000 Author

Level 2

195 points

Oct 5, 2014 4:08 AM in response to Linc Davis

I just noticed this reply, Didn’t get the email notification.

Thanks. I will try your suggestion & see if it works.

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Answer 7

growler62000 Author

Level 2

195 points

Oct 6, 2014 7:20 AM in response to Linc Davis

I think it is fixed! Thanks to Linc Davis! Was the extension that created the placeholder which only stopped video but, not always audio from playing immediately.

I have 4 extensions:

I uninstalled:

Ultimate Status Bar & Click To Flash

I’m leaving, for now, AdBlock & Flash to HTML5

Click to Flash must have been the culprit!

I’ve tested videos on; YouTube, Fox, USA Today & all videos start immediately . No placeholders, I think that feature is disabled & hence issue resolved.

Thanks again!

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