我那个 nvidia 的显卡 (应该是在 Linux 下就是) 就算在 chrome://gpu 裏是 Video Decode: Hardware accelerated, 在播片的时候还是会说 *HW video decode acceleration not available.* 然后我发现 Chrome OS 有 vaapi 的 decoder, 就把 #ifdef OS_CHROMEOS 改成 OS_LINUX, 具体看这个 patch (base64 编码):
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然后就没有显示 *HW video decode acceleration not available.* 了，但 CPU usage 没有下降。
之后我的显卡坏了，於是先用着核显，然后发现 CPU usage 下降了
要先安装 libva 和 x11-libs/libva-[intel|vdpau]-driver 再打 patch, 然后 compile，这样就可以了
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然后就没有显示 *HW video decode acceleration not available.* 了，但 CPU usage 没有下降。
之后我的显卡坏了，於是先用着核显，然后发现 CPU usage 下降了
要先安装 libva 和 x11-libs/libva-[intel|vdpau]-driver 再打 patch, 然后 compile，这样就可以了
