Just to add some context to the "very-very-very slow" part: using the
fastest speed preset, v1.0.0 is 26x slower than v3.2.0. It also uses 3x
the RAM. (tested on a 1080p video using a single thread to remove any
multi-threading changes from the equation)

Not only that, but v1.0.0's fastest preset is incapable of producing
files as efficiently compressed as v3.2.0's fastest preset, so the
latest release even has an 11.5% compression efficiency improvement.
v1.0.0 also doesn't have a real-time encoding mode, that was added in
v2.0.0.

Furthermore, the changelog
(https://aomedia.googlesource.com/aom/+/df61427b1bcf6f6beff7d1293895633929af6a76/CHANGELOG)
states that v2.0.0 is the "First official release of libaom." How I
interpret this is that v1.0.0 was an unoptimized reference codec
release, akin to the reference software of other codecs (like the HM of
HEVC and VTM for VVC), and v2.0.0 was the first libaom release intended
for end-users.

Personally, I consider v1.0.0 impractical for real use cases, and as
such an update would be required to make any of the aom packages useful.

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https://bugs.launchpad.net/bugs/1947695

Title:
  libaom update needed

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