Same here, disabling Hardware Acceleration is not a solution.
Posts made by khenio
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	RE: Opera 45 slow video playback especially with youtubeOpera for Windows
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	RE: Videos and streams audio/video out of syncOpera for WindowsI'm unsure, youtube videos appears to be fine, on Twitter videos there is random small freezes when i watch it on one of my 1080p60hz monitor, if i move opera to my main 1440p144hz monitor the little freezes go away. I tried to disable every extensions but it didn't changed anything, also i have no power saving feature enabled but the issue does not appears on the others browsers. My Video Card driver is up to date: 17.5.2, no problems at that side. 
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	Videos and streams audio/video out of syncOpera for WindowsHello I'm having the exact same issues as described in this link: https://forums.opera.com/topic/16197/twitch-video-audio-out-of-sync And the stream doesn't seems to be very smooth, there is some sort of video "lag" that makes the sound out of sync. I don't have those issues with others browsers. In the link they talk about multi monitors too, i do have a multi monitor setup 
 1: 1440p144hz
 2: 1080p60hz
 3: 1080p60hzI'm watching twitch streams on the 1080p60hz monitors Version : 45.0.2552.888 (PGO) - Opera est à jour 
 Flux de mise à jour : Stable
 Système : Windows 10 64-bit (WoW64)