Commit graph

9 commits

Author SHA1 Message Date
Arun Raghavan
cc7aeb3f33 videomixer2: Fix a leak
Buffers weren't being unref'ed in one case inside, causing memory usage
to blow up.
2011-10-14 13:10:49 +05:30
Arun Raghavan
4d3ee9005c videomixer2: Fix incorrect gst_buffer_replace() call
This got exposed when gst_buffer_replace() was changed from a macro to a
function.
2011-10-13 16:59:50 +05:30
Robert Swain
fd6ac6aa8a videomixer: address unused but set variables
GCC 4.6.x spits warnings about variables that are set but unused. Such
variables have been removed in blend, collectpads2 and videomixer2.
2011-04-16 12:52:49 +01:00
Sebastian Dröge
ce66aea7b0 videomixer[2]: Use orc_memset() instead of memset() 2011-04-01 11:35:26 +02:00
Lane Brooks
69b5aedc58 videomixer2: Add transparent background option for alpha channel formats
This option allows the videomixer2 element to output a valid alpha
channel when the inputs contain a valid alpha channel. This allows
mixing to occur in multiple stages serially.

The following pipeline shows an example of such a pipeline:

gst-launch videotestsrc background-color=0x000000 pattern=ball ! video/x-raw-yuv,format=\(fourcc\)AYUV ! videomixer2 background=transparent name=mix1 ! videomixer2 name=mix2 ! ffmpegcolorspace ! autovideosink  videotestsrc ! video/x-raw-yuv,format=\(fourcc\)AYUV ! mix2.

The first videotestsrc in this pipeline creates a moving ball on a
transparent background. It is then passed to the first videomixer2.
Previously, this videomixer2 would have forced the alpha channel to
1.0 and given a background of checker, black, or white to the
stream. With this patch, however, you can now specify the background
as transparent, and the alpha channel of the input will be
preserved. This allows for further mixing downstream, as is shown in
the above pipeline where the a second videomixer2 is used to mix in a
background of an smpte videotestsrc. So the result is a ball hovering
over the smpte test source. This could, of course, have been
accomplished with a single mixer element, but staged mixing is useful
when it is not convenient to mix all video at once (e.g. a pipeline
where a foreground and background bin exist and are mixed at the final
output, but the foreground bin needs an internal mixer to create
transitions between clips).

Fixes bug #639994.
2011-04-01 11:35:26 +02:00
Tim-Philipp Müller
4451718eff videomixer2: pre-register pad class properly with g_type_class_ref
Fix code to match the comment. Also, there's no need to register the
background enum type again, this is already done via install_property.
2010-09-23 21:22:45 +01:00
Thiago Santos
de8fda9cc2 videomixer2: Fail when caps are incompatible
Do not forget to return false when caps are incompatible.
2010-09-05 22:34:36 -03:00
Sebastian Dröge
e79742205c videomixer2: Add documentation and add to the docs 2010-09-04 14:55:43 +02:00
Sebastian Dröge
bcfd60a8d2 videomixer2: Add videomixer2 element
This is based on collectpads2 and is synchronizing
all streams based on the running time.

New features compared to old videomixer:
 * Synchronizing frames on the running time
 * Improved and simplified negotiation
 * Full QoS support
 * Variable framerate support

Fixes bug #626048, #624905.
2010-09-04 14:52:11 +02:00