[FFmpeg-devel] [PATCH] lavfi/showspectrum: default height to 512

[Rudolf Polzer]

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 too.

Therefore, change the default height from 480 to 512.

Signed-off-by: Rudolf Polzer <divverent at xonotic.org>
---
 libavfilter/avf_showspectrum.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavfilter/avf_showspectrum.c b/libavfilter/avf_showspectrum.c
index 41f7a8e..be4d800 100644
--- a/libavfilter/avf_showspectrum.c
+++ b/libavfilter/avf_showspectrum.c
@@ -57,8 +57,8 @@ 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 },
     { "combined", "set combined mode", OFFSET(combined), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, FLAGS },
     { "intensity", "set intensity based coloring", OFFSET(intensity_colors), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, FLAGS },
-- 
1.8.1.1