# note: An ALPH chunk with the VP8X alpha flag left clear.
# expect: ok
# exercises: The flag and the chunk are independent: the decoder walks to the
#   ALPH chunk and uses it whatever VP8X claimed. A file the muxer would call
#   inconsistent and the decoder does not.
chunks VP8X ALPH VP8
width 16
height 16
yac_qi 30
macroblock
coeffs y2 -20
coeffs y[2] 1:5 -3