# note: A chunk with a fourcc the format does not define, ahead of the frame.
# expect: ok
# exercises: The same skip path as the metadata chunks, but with a tag no
#   version of libwebp knows. An unknown chunk must be stepped over, not
#   refused: that is what makes the format extensible.
chunks VP8X JUNK VP8
payload JUNK deadbeefcafe
width 32
height 32
yac_qi 30
macroblock
coeffs y2 -20
coeffs y[6] 1:4 -2
macroblock
intra_y_mode V_PRED
coeffs y2 12
macroblock count 2