最近發現在透過chrome看一些線上課程影片時，影片會有聲音沒畫面。
win10的電腦都沒問題，只有win7的電腦會有這種狀況，所以排除影片本身的問題。
後來才發現竟是chrome裡面設定造成的，在win7電腦中，需要把chrome裡面有一個硬體加速的功能關閉，影片的畫面才能正常顯示。
No Video but Sound when Playing Online Videos in Chrome on Windows 7
Recently, I noticed that when using Chrome to watch online course videos, there would be sound but no video playback. This issue was specific to computers running Windows 7, as there were no problems on Windows 10 machines. Therefore, I ruled out any problems with the videos themselves.
Later, I discovered that the issue was actually caused by a setting within Chrome. On the Windows 7 computers, it was necessary to disable a feature called hardware acceleration in Chrome to enable proper video playback.
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