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lavfi/showspectrum: set default height to 512

Only power-of-two FFTs are supported; so to get a full spectrum
(that is, one up to Nyquist), the height must be a power of two.

Therefore, change the default height from 480 to 512.

Signed-off-by: Rudolf Polzer <divverent@xonotic.org>
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divVerent authored and richardpl committed Feb 3, 2013
1 parent 4d37d2b commit 773fc6e0c7122740c3dd6530df6406282ced34da
Showing with 3 additions and 3 deletions.
  1. +1 −1 doc/filters.texi
  2. +2 −2 libavfilter/avf_showspectrum.c
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@@ -6019,7 +6019,7 @@ spectrum.
The filter accepts the following named parameters:
@table @option
@item size, s
-Specify the video size for the output. Default value is @code{640x480}.
+Specify the video size for the output. Default value is @code{640x512}.
@item slide
Specify if the spectrum should slide along the window. Default value is
@code{0}.
@@ -51,8 +51,8 @@ typedef struct {
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption showspectrum_options[] = {
- { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "640x480"}, 0, 0, FLAGS },
- { "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "640x480"}, 0, 0, FLAGS },
+ { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "640x512"}, 0, 0, FLAGS },
+ { "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "640x512"}, 0, 0, FLAGS },
{ "slide", "set sliding mode", OFFSET(sliding), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, FLAGS },
{ NULL },
};

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