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gstreamer/gst/videomixer
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Douglas Bagnall 0b898ab911 videoconvert: Compare y offset with height, not width, when testing for overlap 
This could have prevented images showing that should have when the
source height is greater than its width.

When width exceeds height, as is common, it probably only caused a
miniscule amount of unnecessary work.  I haven't tested.
2012-11-02 09:29:30 +01:00
..
blend.c videoconvert: Compare y offset with height, not width, when testing for overlap 2012-11-02 09:29:30 +01:00
blend.h videomixer2: Adding nv12 and nv21 support 2012-09-12 10:46:22 +02:00
blendorc-dist.c gst: update disted orc files 2012-08-08 15:10:37 +01:00
blendorc-dist.h videomixer: prefix orc functions with video_mixer_orc_ 2012-07-24 09:17:09 +02:00
blendorc.orc videomixer: prefix orc functions with video_mixer_orc_ 2012-07-24 09:17:09 +02:00
Makefile.am gst: Update versioning 2012-04-04 14:37:47 +02:00
README A plugin to add an alpha channel to I420 video. Can optionally do chroma keying. 2004-05-28 18:01:34 +00:00
videomixer.vcproj more working plugins 2004-07-27 21:41:30 +00:00
videomixer2.c videomixer2: Fix race condition where a src setcaps is ignored 2012-10-19 12:10:31 +02:00
videomixer2.h videomixer2: Fix race condition where a src setcaps is ignored 2012-10-19 12:10:31 +02:00
videomixer2pad.h collectpads2: rename to collectpads 2012-04-17 15:14:27 +02:00

README 

Video Mixer
-----------

A generice video mixer, it blends the ayuv buffers from all pads onto 
a new buffer. The new buffer has by default a checkerboard pattern but
its color can be changed with a property.
The mixer can mix streams with different framerates and video sizes. It
uses the duration value of the buffer to schedule the rendering of the
buffers. For streams with a different resoltion than the final output
resolution one can specify the position of the top left corner where this
image should be placed with the pad properties xpos and ypos.
The overall alpha value of a stream can also be specified with a pad
property.
By default, the streams are blended in the order that the pads were 
requested from the element. This can be overridden by changing the 
zorder pad property of the stream, a stream with lower zorder gets
drawn first.


TODO
----

- really implement zorder
- take I420 yuv as well
- output AYUV if possible.
- implement different blend modes, some code is already done
- use filter caps on srcpad to decide on the final output size