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No, but it has been added to VLC git master (cf. changelog [1]) as an experimental feature using libaom.

[1] https://git.videolan.org/?p=vlc.git;a=blob_plain;f=NEWS;hb=H...

No. With the bitstream only just frozen, I expect decoder/encoder wrappers for libaom to take a few months.

Is it expected that libaom will be the de facto standard open source enoder, like x264 is for h.264?

Who knows? But ffmpeg should be able to include multiple different encoding libraries for av1 regardless. libaom would be one of them at least.

The bitstream isn't frozen yet.

As an aside: A wrapper within FFmpeg for libaom is only a few hours work, but if you want to play with it Right Now, VLC has support. A native decoder will indeed take significantly longer though.

A wrapper within FFmpeg for libaom is only a few hours work

Batteries and bikeshedding on the Devel ML not included...

I was mistaken, one is already written, but not merged.

So we're already in bikeshed mode ;)

Mea culpa.

Already added - http://git.videolan.org/?p=ffmpeg.git;a=commit;h=0dc11d8bbd4... and http://git.videolan.org/?p=ffmpeg.git;a=commit;h=99cc3cf7a26...

GStreamer has support for AV1 in 1.14 if you want to use it today.