# note: One ANMF carrying two image chunks.
# expect: reject
# anim: reject
# info: reject
# exercises: How the walk leaves a frame it cannot finish. StoreFrame()
#   takes the first VP8L, sees a second while image_chunks is already one,
#   and jumps to the label that rewinds and stops -- leaving the reader
#   positioned inside the ANMF payload, at the second image's header. The
#   outer walk then reads that as a top-level chunk and refuses it, because
#   in an animation every image belongs to a frame.
frame
frame_duration 100
chunks VP8L VP8L
lossless
width 16
height 16
argb 0xff800000 x256