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-rw-r--r--libavfilter/vf_scale.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/libavfilter/vf_scale.c b/libavfilter/vf_scale.c
index 2ea55ef441..945ed121dd 100644
--- a/libavfilter/vf_scale.c
+++ b/libavfilter/vf_scale.c
@@ -81,6 +81,7 @@ typedef struct {
* New dimensions. Special values are:
* 0 = original width/height
* -1 = keep original aspect
+ * -N = try to keep aspect but make sure it is divisible by N
*/
int w, h;
char *size_str;