From: Limin Wang <lance.lmw...@gmail.com>
Reviewed-by: Gyan <ffm...@gyani.pro>
Signed-off-by: Limin Wang <lance.lmw...@gmail.com>
---
doc/filters.texi | 55 ++++++++++++++++++++++++++++++++++++++++++++++++++++---
1 file changed, 52 insertions(+), 3 deletions(-)
diff --git a/doc/filters.texi b/doc/filters.texi
index e6f8bf0..581a96b 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -19060,6 +19060,13 @@ terminates. Default value is 0.
@itemize
@item
Display 4 inputs into 2x2 grid.
+
+Below is the 4 inputs position:
+@example
+input1(0, 0) | input3(w0, 0)
+input2(0, h0) | input4(w0, h0)
+@end example
+
Note that if inputs are of different sizes unused gaps might appear,
as not all of output video is used.
@example
@@ -19068,6 +19075,15 @@ xstack=inputs=4:layout=0_0|0_h0|w0_0|w0_h0
@item
Display 4 inputs into 1x4 grid.
+
+Below is the 4 inputs position:
+@example
+input1(0, 0)
+input2(0, h0)
+input3(0, h0+h1)
+input4(0, h0+h1+h2)
+@end example
+
Note that if inputs are of different sizes unused gaps might appear,
as not all of output video is used.
@example
@@ -19076,11 +19092,44 @@ xstack=inputs=4:layout=0_0|0_h0|0_h0+h1|0_h0+h1+h2
@item
Display 9 inputs into 3x3 grid.
-Note that if inputs are of different sizes unused gaps might appear,
-as not all of output video is used.
+
+Below is the 9 inputs position:
@example
-xstack=inputs=9:layout=w3_0|w3_h0+h2|w3_h0|0_h4|0_0|w3+w1_0|0_h1+h2|w3+w1_h0|w3+w1_h1+h2
+input1(0, 0) | input4(w0, 0) | input7(w0+w3, 0)
+input2(0, h0) | input5(w0, h0) | input8(w0+w3, h0)
+input3(0, h0+h1) | input6(w0, h0+h1) | input9(w0+w3, h0+h1)
@end example
+
+Note that if the input size is different, there may be unused gaps or
+overlaps. For example, if the height of input4 is greater than input1,
+input5 will overlaid the top of input4, if the width of input5 is less
+than input4, then input5 will have unused gaps.
+
+@example
+xstack=inputs=9:layout=0_0|0_h0|0_h0+h1|w0_0|w0_h0|w0_h0+h1|w0+w3_0|w0+w3_h0|w0+w3_h0+h1
+@end example
+
+@item
+Display 16 inputs into 4x4 grid.
+
+Below is the 16 inputs position:
+@example
+input1(0, 0) | input5(w0, 0) | input9 (w0+w4, 0) |
input13(w0+w4+w8, 0)
+input2(0, h0) | input6(w0, h0) | input10(w0+w4, h0) |
input14(w0+w4+w8, h0)
+input3(0, h0+h1) | input7(w0, h0+h1) | input11(w0+w4, h0+h1) |
input15(w0+w4+w8, h0+h1)
+input4(0, h0+h1+h2)| input8(w0, h0+h1+h2)| input12(w0+w4, h0+h1+h2)|
input16(w0+w4+w8, h0+h1+h2)
+@end example
+
+Note that if the input size is different, there may be unused gaps or
+overlaps. For example, if the height of input5 is greater than input1,
+input6 will overlaid the top of input5, if the width of input6 is less
+than input5, then input6 will have unused gaps.
+
+@example
+xstack=inputs=16:layout=0_0|0_h0|0_h0+h1|0_h0+h1+h2|w0_0|w0_h0|w0_h0+h1|w0_h0+h1+h2|w0+w4_0|
+w0+w4_h0|w0+w4_h0+h1|w0+w4_h0+h1+h2|w0+w4+w8_0|w0+w4+w8_h0|w0+w4+w8_h0+h1|w0+w4+w8_h0+h1+h2
+@end example
+
@end itemize
@anchor{yadif}
--
2.6.4
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