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Comment by patja | Hacker News Reader

I find it interesting that he refuses to wear wireless headphones while podcasting because he can't tolerate the latency. But he's perfectly fine with it when watching a movie? Lip synch latency drives me crazy once I notice it.

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I thought modern devices delay the video, so it syncs up with the audio? When I'm using Bluetooth headphones on iOS, pressing play doesn't start the video immediately, but it does when I'm not using headphones. The audio stops after the video if I pause it when using Bluetooth headphones.

Yes, iOS devices will tend to delay the video when playing audio over BT. They also recently issued an update to the HomePod that allows it to do low-latency audio (so you can use it with an AppleTV playing/streaming games), but I think that's using their own proprietary streaming (AirPlay 2) over WiFi, not BT (details on the feature have been scarce and it's relatively new).

Interestingly, the low-latency audio breaks apps that provide their own video player (Twitch & YouTube), since they aren't aware of the low latency features and they try to compensate for a system feature on their own.

Yep. I was an early adopter of wireless audio and in the beginning audio-video sync was a real issue.

Since a few years ago, this is a solved problem.

I haven't experienced lip-sync latency with bluetooth watching video in years. Appletv, iPhone, iPad, MacBook - all sync video and BT audio up properly to account for latency.

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