GStreamers basetransform has a nasty issue where its caps negotiation doesn't
keep the ordering of caps when unioning, as a result of this linking the
pipeline as "<src> ! videoscale ! colorspace ! video/x-raw-yuv" means at the
<src> element yuv is no longer preferred.
Changing the pipeline to be "<src> ! colorspace ! videoscale ! video/x-raw-yuv"
forces the videoscale to only negotiate video/x-raw-yuv, which in turns ensures
the colorspace and <src> element pick the right colorspace.
In combination with emulated formats in v4l2src picking the wrong colorspace
causes quite a performance hit (the src would do a color conversion in libv4l,
while the colorspace element would later convert it back to a colorspace
actually native to the src device!)
g_debug ("Current video src caps are : %s", str);
g_free (str);
g_debug ("Current video src caps are : %s", str);
g_free (str);
+ if ((element = empathy_gst_add_to_bin (GST_BIN (obj),
+ element, "ffmpegcolorspace")) == NULL)
+ g_error ("Failed to add \"ffmpegcolorspace\" (gst-plugins-base missing?)");
+
if ((element = empathy_gst_add_to_bin (GST_BIN (obj),
element, "videoscale")) == NULL)
g_error ("Failed to add \"videoscale\", (gst-plugins-base missing?)");
if ((element = empathy_gst_add_to_bin (GST_BIN (obj),
element, "videoscale")) == NULL)
g_error ("Failed to add \"videoscale\", (gst-plugins-base missing?)");
+ if ((element = empathy_gst_add_to_bin (GST_BIN (obj),
+ element, "capsfilter")) == NULL)
+ g_error (
+ "Failed to add \"capsfilter\" (gstreamer core elements missing?)");
+
+ g_object_set (G_OBJECT (element), "caps", caps, NULL);
+
+
/* optionally add postproc_tmpnoise to improve the performance of encoders */
element_back = element;
if ((element = empathy_gst_add_to_bin (GST_BIN (obj),
/* optionally add postproc_tmpnoise to improve the performance of encoders */
element_back = element;
if ((element = empathy_gst_add_to_bin (GST_BIN (obj),
element = element_back;
}
element = element_back;
}
- if ((element = empathy_gst_add_to_bin (GST_BIN (obj),
- element, "ffmpegcolorspace")) == NULL)
- g_error ("Failed to add \"ffmpegcolorspace\" (gst-plugins-base missing?)");
-
- if ((element = empathy_gst_add_to_bin (GST_BIN (obj),
- element, "capsfilter")) == NULL)
- g_error (
- "Failed to add \"capsfilter\" (gstreamer core elements missing?)");
-
- g_object_set (G_OBJECT (element), "caps", caps, NULL);
-
src = gst_element_get_static_pad (element, "src");
g_assert (src != NULL);
src = gst_element_get_static_pad (element, "src");
g_assert (src != NULL);