Changes between Version 5 and Version 6 of Scaling

Timestamp:

Dec 22, 2015, 7:59:37 PM (10 years ago)

Author:

compn

Comment:

--

Scaling

@@ -32 +32 @@
 [[Image(input_double_width.png)]]
 
+If you want to half the size of the picture, just multiply by .5
+{{{
+ffmpeg -i input.jpg -vf scale=iw*.5:ih*.5 input_half_size.png
+}}}
+
 Sometimes there is a need to scale the input image in such way it fits into a specified rectangle, i.e. if you have a placeholder (empty rectangle) in which you want to scale any given image. This is a little bit tricky, since you need to check the original aspect ratio, in order to decide which component to specify and to set the other component to -1 (to keep the aspect ratio). For example, if we would like to scale our input image into a rectangle with dimensions of 320x240, we could use something like this:
 {{{