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| author | Kevin Mark <kmark937@gmail.com> | 2017-06-04 03:53:31 -0400 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-06-05 01:50:25 +0200 |
| commit | 4af496473a0684b798d5712d8c96357e9b036b43 (patch) | |
| tree | 52f8c00e6a08beab55254e0387329ea766c1934d /tests/filtergraphs | |
| parent | 46b865ea9f86cbd12e1bf701913263c7932cccb0 (diff) | |
| download | ffmpeg-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>
Diffstat (limited to 'tests/filtergraphs')
| -rw-r--r-- | tests/filtergraphs/scale2ref_keep_aspect | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/tests/filtergraphs/scale2ref_keep_aspect b/tests/filtergraphs/scale2ref_keep_aspect new file mode 100644 index 0000000000..f407460ec7 --- /dev/null +++ b/tests/filtergraphs/scale2ref_keep_aspect @@ -0,0 +1,5 @@ +sws_flags=+accurate_rnd+bitexact; +testsrc=size=320x240 [main]; +testsrc=size=640x360 [ref]; +[main][ref] scale2ref=iw/4:ow/mdar [main][ref]; +[ref] nullsink |