On Sun, Jun 04, 2017 at 03:53:31AM -0400, Kevin Mark wrote: > 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 <kmark...@gmail.com> > --- > tests/fate/filter-video.mak | 4 ++++ > tests/filtergraphs/scale2ref_keep_aspect | 5 +++++ > tests/ref/fate/filter-scale2ref_keep_aspect | 14 ++++++++++++++ > 3 files changed, 23 insertions(+) > create mode 100644 tests/filtergraphs/scale2ref_keep_aspect > create mode 100644 tests/ref/fate/filter-scale2ref_keep_aspect
applied thx [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB The greatest way to live with honor in this world is to be what we pretend to be. -- Socrates
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