ffmpeg/tests/ref/fate/sub2video_time_limited

#tb 0: 1/25
#media_type 0: video
#codec_id 0: rawvideo
#dimensions 0: 1920x1080
#sar 0: 0/1
0,          2,          2,        1,  8294400, 0x00000000
0,          2,          2,        1,  8294400, 0xa87c518f
0,         10,         10,        1,  8294400, 0xa87c518f
fate/ffmpeg: add test for time limited sub2video instance Utilizes a subpicture sample with one decodable subpicture for the test. Based on a failing test case in reported by Michael in https://ffmpeg.org/pipermail/ffmpeg-devel/2019-February/240398.html which at the time had no test case for it. Additionally, this is the first test case for the presentation graphics format. 2020-03-11 23:22:15 +00:00			`#tb 0: 1/25`
			`#media_type 0: video`
			`#codec_id 0: rawvideo`
			`#dimensions 0: 1920x1080`
			`#sar 0: 0/1`
			`0, 2, 2, 1, 8294400, 0x00000000`
			`0, 2, 2, 1, 8294400, 0xa87c518f`
			`0, 10, 10, 1, 8294400, 0xa87c518f`