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From 09c6b1c1f17ad20c87a3bee7c4665bb6ef34a211 Mon Sep 17 00:00:00 2001
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From: Hans de Goede <hdegoede@redhat.com>
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Date: Wed, 22 Aug 2012 10:32:08 +0200
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Subject: [PATCH 2/4] Setup vp8enc in a way suitable for realtime encoding
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Note that upstream has nacked this patch wanting to fix it instead by
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using a realtime vp8enc preset, and teaching vp8enc to automatically pick
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a number of threads when threads == 0, see:
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https://bugzilla.gnome.org/show_bug.cgi?id=678447
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Although that would indeed be better, unfortunately code for neither exists
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atm, so for now we carry this patch in Fedora, since it makes the difference
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between making recordings in cheese working or not working.
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Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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---
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libcheese/cheese-camera.c | 26 +++++++++++++++++++++-----
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1 file changed, 21 insertions(+), 5 deletions(-)
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diff --git a/libcheese/cheese-camera.c b/libcheese/cheese-camera.c
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index af073f3..d41a669 100644
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--- a/libcheese/cheese-camera.c
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+++ b/libcheese/cheese-camera.c
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@@ -32,6 +32,7 @@
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#include <clutter-gst/clutter-gst.h>
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#include <gst/gst.h>
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#include <X11/Xlib.h>
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+#include <unistd.h>
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#include "cheese-camera.h"
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#include "cheese-camera-device.h"
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@@ -444,6 +445,7 @@ cheese_camera_set_video_recording (CheeseCamera *camera, GError **error)
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CheeseCameraPrivate *priv = camera->priv;
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GstElement *video_enc;
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GstElement *mux;
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+ int n_threads;
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g_return_if_fail (error == NULL || *error == NULL);
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@@ -453,11 +455,18 @@ cheese_camera_set_video_recording (CheeseCamera *camera, GError **error)
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return;
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}
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g_object_set (priv->camerabin, "video-encoder", video_enc, NULL);
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- /* Use a preset, or set some reasonable defaults. */
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- if (!gst_preset_load_preset (GST_PRESET (video_enc), "Profile Realtime"))
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- {
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- g_object_set (G_OBJECT (video_enc), "max-latency", 1, "speed", 2, NULL);
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- }
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+
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+ /* Since we do realtime encoding setup the encoder for speed without
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+ sacrificing too much quality */
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+ g_object_set (G_OBJECT (video_enc), "max-latency", 1, NULL);
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+ g_object_set (G_OBJECT (video_enc), "speed", 6, NULL);
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+#ifdef _SC_NPROCESSORS_ONLN
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+ n_threads = sysconf (_SC_NPROCESSORS_ONLN); /* includes hyper-threading */
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+ n_threads = MIN (n_threads, 64);
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+#else
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+ n_threads = 3;
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+#endif
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+ g_object_set (G_OBJECT (video_enc), "threads", n_threads, NULL);
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if ((mux = gst_element_factory_make ("webmmux", "webmmux")) == NULL)
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{
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@@ -692,6 +701,7 @@ cheese_camera_play (CheeseCamera *camera)
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{
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CheeseCameraPrivate *priv;
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CheeseCameraDevice *device;
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+ GObject *video_enc;
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GstCaps *caps;
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g_return_if_fail (CHEESE_IS_CAMERA (camera));
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@@ -714,6 +724,12 @@ cheese_camera_play (CheeseCamera *camera)
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g_signal_emit_by_name (priv->camerabin, "set-video-resolution-fps",
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priv->current_format->width,
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priv->current_format->height, 0, 1, 0);
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+ if (priv->current_format->width >= 1280 &&
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+ priv->current_format->height >= 720)
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+ {
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+ g_object_get (priv->camerabin, "video-encoder", &video_enc, NULL);
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+ g_object_set (video_enc, "token-parts", 2, NULL);
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+ }
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}
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gst_caps_unref (caps);
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--
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1.7.11.4
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