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-rw-r--r--vpx/vp8cx.h5
-rw-r--r--vpxenc.c3
2 files changed, 6 insertions, 2 deletions
diff --git a/vpx/vp8cx.h b/vpx/vp8cx.h
index d4aa0e21e..8d38c981a 100644
--- a/vpx/vp8cx.h
+++ b/vpx/vp8cx.h
@@ -169,7 +169,10 @@ enum vp8e_enc_control_id {
*/
VP8E_SET_NOISE_SENSITIVITY,
- /*!\brief Codec control function to set sharpness.
+ /*!\brief Codec control function to set higher sharpness at the expense
+ * of a lower PSNR.
+ *
+ * \note Valid range: 0..7
*
* Supported in codecs: VP8, VP9
*/
diff --git a/vpxenc.c b/vpxenc.c
index 770a91762..9fd36af33 100644
--- a/vpxenc.c
+++ b/vpxenc.c
@@ -342,7 +342,8 @@ static const arg_def_t *kf_args[] = { &kf_min_dist, &kf_max_dist, &kf_disabled,
static const arg_def_t noise_sens =
ARG_DEF(NULL, "noise-sensitivity", 1, "Noise sensitivity (frames to blur)");
static const arg_def_t sharpness =
- ARG_DEF(NULL, "sharpness", 1, "Loop filter sharpness (0..7)");
+ ARG_DEF(NULL, "sharpness", 1,
+ "Increase sharpness at the expense of lower PSNR. (0..7)");
static const arg_def_t static_thresh =
ARG_DEF(NULL, "static-thresh", 1, "Motion detection threshold");
static const arg_def_t auto_altref =