The software decoder is not considerably slower than the VP9 decoder, which is pretty fast. If you want to try it out, Firefox Nightly ships a pre-release AV1 d

The software decoder is not considerably slower than the VP9 decoder, which is pretty fast. If you want to try it out, Firefox Nightly ships a pre-release AV1 decoder behind a runtime preference, so you can try it out. There's still a chance that it can't keep up, of course. Also, it's likely that you've been using the hardware decoder on your machine for H.264, which would further take a load off. H.265 decoders also vary considerably in terms of speed, I've noticed recently that ffmpeg decodes H.265 faster than it used to. https://hacks.mozilla.org/2017/11/dash-playback-of-av1-video/ https://hacks.mozilla.org/2017/11/dash-playback-of-av1-video...