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vp8enc/vp8enc: set 1 for the default value of VP8E_SET_STATIC_THRESHOLD

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In Google webrtc, the setting VP8E_SET_STATIC_THRESHOLD is set to 1
(except when the content is known to be static very often in which
case it is set to 100, i.e. when sharing screen with Google Hangouts).

The cpu usage drops a lot when using 1 for above setting because it
allows the encoder to skip static/low content blocks. The current
0 default value uses too much cpu and confuses the user regarding
the cpu usage expectations. User expects vp8enc to use low cpu by
default.

Documentation of VP8E_SET_STATIC_THRESHOLD:
  https://github.com/webmproject/libvpx/blob/master/vpx/vp8cx.h#L188

chromium/webrtc:
  b484ec0082/modules/video_coding/codecs/vp8/libvpx_vp8_encoder.cc (822)

Closes #58
This commit is contained in:
Julien Isorce 2020-01-27 15:17:27 -08:00 committed by Nicolas Dufresne
parent 83e9d4f70d
commit 88ce7397fc
1 changed files with 6 additions and 3 deletions
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9
ext/vpx/gstvpxenc.c
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@ -88,7 +88,10 @@ GST_DEBUG_CATEGORY_STATIC (gst_vpxenc_debug);
#define DEFAULT_DEADLINE VPX_DL_BEST_QUALITY
#define DEFAULT_NOISE_SENSITIVITY 0
#define DEFAULT_SHARPNESS 0
#define DEFAULT_STATIC_THRESHOLD 0
/* Use same default value as Chromium/webrtc. */
#define DEFAULT_STATIC_THRESHOLD 1
#define DEFAULT_TOKEN_PARTITIONS 0
#define DEFAULT_ARNR_MAXFRAMES 0
#define DEFAULT_ARNR_STRENGTH 3
@ -582,8 +585,8 @@ gst_vpx_enc_class_init (GstVPXEncClass * klass)
g_object_class_install_property (gobject_class, PROP_STATIC_THRESHOLD,
g_param_spec_int ("static-threshold", "Static Threshold",
"Motion detection threshold",
0, G_MAXINT, DEFAULT_STATIC_THRESHOLD,
"Motion detection threshold. Recommendation is to set 100 for "
"screen/window sharing", 0, G_MAXINT, DEFAULT_STATIC_THRESHOLD,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
g_object_class_install_property (gobject_class, PROP_TOKEN_PARTITIONS,