tests/ref/fate/gif-disposal-background

#tb 0: 1/2
#media_type 0: video
#codec_id 0: rawvideo
#dimensions 0: 72x36
#sar 0: 0/1
0,          0,          0,        1,    10368, 0x8b200cc8
0,          1,          1,        1,    10368, 0x4e208e4f
0,          2,          2,        1,    10368, 0x044dba8b
0,          3,          3,        1,    10368, 0x1d617e09
0,          4,          4,        1,    10368, 0xae38a6d2