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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!)
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* Fix various typos and broken phrasing
* Use the right log level for various messages
* Fix potentially calling gst_object_unref (NULL)
* Fix coding style
* Make various debug messages more useful
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Add videomaxrate and postproc_tmpnoise as optional filters to
empathy_video_src_init. Thay will used if thay are installed.
videomaxrate will set maximal framerate to 15fps if some haw webcam
will get more than 15fps it will not kill empathy-av with high CPU load.
postproc_tmpnoise will reduce video noise produced by most (all) webcams.
This will add smoll overhead for load but reduce CPU load of video encoder.
Also this should reduce network load (for theoraenc x2)
Signed-off-by: Alexey Fisher <bug-track@fisher-privat.net>
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Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
svn path=/trunk/; revision=2562
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Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
svn path=/trunk/; revision=2558
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Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
svn path=/trunk/; revision=2384
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