# note: A frame carrying both an alpha chunk and a lossless image.
# expect: reject
# anim: reject
# info: reject
# exercises: "VP8L has its own alpha": the lossless format carries a fourth
#   channel already, so an ALPH beside it is contradictory rather than
#   redundant, and StoreFrame() refuses the pair outright as soon as it
#   reads the VP8L tag with alpha_chunks non-zero.
alpha 1
frame
frame_duration 100
chunks ALPH VP8L
alph_raw
lossless
width 16
height 16
alpha_is_used 1
argb 0x80800000 x256