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使用 AV1 进行 YouTube 视频播放
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What is your OS and browser? If your browser does not support AV1, you cannot use it.
And some old videos might not have AV1 codec.
firefox 121.0.1
Windows 11 22635
firefox 121.0.1Windows 11 22635
For windows 11, you have to install AV1 Video Extension from MS store.
https://www.microsoft.com/en-us/p/av1-video-extension/9mvzqvxjbq9v
( for details, see https://www.reddit.com/r/firefox/comments/u17udy/installed_firefox_100_beta_and_av1_doesnt_seem_to/ )
I already have it installed
I don't know. Any error message in the console log? (right click the page and click inspect)
Not every video have AV1 source. Try https://www.youtube.com/watch?v=dFlDRhvM4L0
You might also try to use another browser. It might be due to the settings in Firefox.
not work