Closed
Description
cat << EOF | pandoc -f html -t markdown --extract-media img
<img src="data:image/avif;base64,AAAAHGZ0eXBhdmlmAAAAAGF2aWZtaWYxbWlhZgAAAXBtZXRhAAAAAAAAACFoZGxyAAAAAAAAAABw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">
EOF
Output:

However, that file is not a valid avif. It seems to be truncated for some reason.
$ avifdec -i img/78d7397a59b9d271ce9ab582eca96377cffff554
ERROR: Failed to parse image: Truncated data