[Cin] SVT-AV1 works on i586, but slowly.

[Andrew Randrianasulu]

Installed SVT-AV1 1.5.0 from Slackbuilds on my Slackware 15.0 i586

it works, but at around 0.8 fps for 720p video

ffmpeg -i MLP_animation_sleepsong_IeIDCNS-VUw.webm -s 1280x720  -an -f
yuv4mpegpipe   - | SvtAv1EncApp -i - -b mlp.ivf --passes 1 --rc 1 --tbr 1000


after looking at code I see all asm there is 64bit :)

this explains why it is much faster on x86_64.

Anyway, even 0.8 fps is ok for short (few mins) clips, I guess.
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