diff --git a/functions/gif2avif.fish b/functions/gif2avif.fish
new file mode 100644
index 0000000..b7bd979
--- /dev/null
+++ b/functions/gif2avif.fish
@@ -0,0 +1,8 @@
+# gif2avif <GIF>
+# convert gif to avif image
+function gif2avif
+    set base (string replace -r '\.gif$' '' -- $argv[1])
+    ffmpeg -i "$argv[1]" -pix_fmt yuv444p10 -strict -1 "$base.y4m"
+    avifenc "$base.y4m" "$base.avif"
+    rm -v "$base.y4m"
+end