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authorKevin Mark <kmark937@gmail.com>2017-06-04 03:53:31 -0400
committerMichael Niedermayer <michael@niedermayer.cc>2017-06-05 01:50:25 +0200
commit4af496473a0684b798d5712d8c96357e9b036b43 (patch)
tree52f8c00e6a08beab55254e0387329ea766c1934d /libavcodec/bmvaudio.c
parent46b865ea9f86cbd12e1bf701913263c7932cccb0 (diff)
downloadffmpeg-4af496473a0684b798d5712d8c96357e9b036b43.tar.gz
FATE: Add test for libavfilter/scale2ref
This new FATE test for the scale2ref filter makes use of the recently added scale2ref-specific variables to maintain the aspect ratio of a test input. Filtergraph explanation: [main] has an AR of 4:3. [ref] has an AR of 16:9. 640 / 4 = 160. So the new width for [main] is 160. 160 / ((320 / 240) * (1 / 1)) = 160 / (4 / 3) = 120. So the new height for [main] is 120. 160 / 120 = 4 / 3 so [main]'s aspect ratio has been maintained while using [ref]'s width as a reference point. [ref] is nullsink'd since it is left unchanged by scale2ref (and so shouldn't need to be tested). If we were to use "iw/4:-1" in place of "iw/4:ow/mdar": 640 / 4 = 160. So the new width for [main] would be 160. 360 / 4 = 90. So the new height for [main] would be 90. 160 / 90 = 16 / 9 so [main] now has the same aspect ratio as [ref] which is probably what you do not want. This is currently the only test for scale2ref. Signed-off-by: Kevin Mark <kmark937@gmail.com> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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