ffmpeg/tests/filtergraphs/alphamerge_alphaextract_rgb

sws_flags=+accurate_rnd+bitexact;
format=bgra, split, alphamerge, split [x][y];
[y]        alphaextract [alpha];
[x][alpha] alphamerge
fate: add bitexact flags to alphaextract/alphamerge tests. Should fix a FATE failure. 2013-04-29 20:27:22 +00:00			`sws_flags=+accurate_rnd+bitexact;`
fate: move alphaextract and alphamerge tests to the new system. The standalone alphaextract tests are removed since already the filters are already tested by the alphamerge tests. 2013-04-29 18:59:52 +00:00			`format=bgra, split, alphamerge, split [x][y];`
			`[y] alphaextract [alpha];`
			`[x][alpha] alphamerge`