# note: A RIFF size that stops in the middle of the chunks behind it.
# expect: reject
# exercises: The "total_size > riff_size" test in ParseOptionalChunks(): the
#   walk adds up what it has skipped and refuses to walk past what the RIFF
#   header said was there.
chunks VP8X JUNK VP8
payload JUNK 00112233445566778899aabbccddeeff
riff_size 30
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