Instead of adding every rendered frame into the recording, drop frames
and only buffer and record enough frames to match the target framerate.
Increase the default frame rate from 15 to 30, since now that we're
actually enforcing framerate, it's noticeable that 15fps is not smooth.
https://bugzilla.gnome.org/show_bug.cgi?id=669066
The default pipeline was fairly aggressive about quality, and could
be too expensive for some computers. Decrease the quality setting for
the vp8 codec from 10 to 8, and increase the speed setting from 2 to 6.
(Basically, quality affects the visual fidelity of the end result, while
speed affects how much CPU the encoder uses to get a high compression
ratio at that quality level.)
Remove videorate from the pipeline, since the GStreamer VP8 encoder can
handle variable-framerate streams. This means that we won't spend CPU
encoding duplicate frames added by videorate.
https://bugzilla.gnome.org/show_bug.cgi?id=669066
For the Intel drivers, using glReadPixels() to read into client-memory
directly from the frame buffer is much slower than creating a pixel
buffer, copying into that, and then mapping that for reading. On other
drivers, the two approaches are likely to be similar in speed. Create
a ShellScreenGrabber abstraction that uses pixel buffers if available.
Use that for screenshots and screen recording.
https://bugzilla.gnome.org/show_bug.cgi?id=669065
Clutter 1.7.x introduced CLUTTER_CAIRO_FORMAT_ARGB32: which can be used when
sharing textures/data with cairo without having to do check the
byte order and choose the appropriate format by hand.
https://bugzilla.gnome.org/show_bug.cgi?id=654577
cogl_read_pixels() used to only support a useless pixel format, but it
will do our preferred format now, so use it rather than doing GL stuff
by hand.
https://bugzilla.gnome.org/show_bug.cgi?id=648758
The vp8 codec provides better performance in pretty much all cases compared
to theora while still being free (as in not patent encumbered).
Also add a %T placeholder to the pipeline string which will be replaced
with the a thread count based on the target system.
https://bugzilla.gnome.org/show_bug.cgi?id=632595
- Specify a minimum version of clutter-1.2.0
- Switch clutter branch in the moduleset to master
- Replace deprecated cogl_texture/material_unref() with
cogl_handle_unref()
- Use cogl_clip_push_rectangle() rather than cogl_clip_push()
- Replace cogl_check_extension() with strstr - should be
accurate enough.
https://bugzilla.gnome.org/show_bug.cgi?id=610679
Make the framerate, file extension and gstreamer pipeline used by the
screencast recorder configureable using gconf.
This patch does not change the defaults, it justs provides a way for
the user to override them.
https://bugzilla.gnome.org/show_bug.cgi?id=608995
The screen recording wasn't working because of two bad interactions
with Cogl:
- Buffered primitives weren't being flushed out
- Cogl changes the pixel store values away from their default values
Thanks for Jon Nettleton for tracking down the source of the
problems with the recorder.
https://bugzilla.gnome.org/show_bug.cgi?id=598390
Some C library versions have __attribute__((warn_unused_result)) on
fgets(). We really don't care since we are just throwing the data
away, but check the result anyways.
Move the GStreamer initialization from the Javascript code into
shell_recorder_init(). This avoids a dependency on the GStreamer
introspection information and will make it easier to drop the
gir-repository module dependency.
- clutter_actor_get_transformed_position()/size() return floats
- clutter_stage_get_actor_at_pos() takes a pick mode
- ClutterTimeline no longer has a concept of frames
- ClutterUnit is now replaced by float
- cogl_texture_new_from_data() signature changed
http://bugzilla.gnome.org/show_bug.cgi?id=585013
For development and demonstration purposes, it's neat to be able to
record a screencast of gnome-shell without any external setup.
Built-in recording can also give much better quality than is possible
with a generic desktop recording, since we hook right into the paint
loop.
src/shell-recorder.[ch]: A general-purposes object to record a Clutter
stage to a GStreamer stream.
src/shell-recorder-src.[ch]: A simple GStreamer source element (similar
to appsrc in the most recent versions of GStreamer) for injecting
captured data into a GStreamer pipeline.
src/test-recorder.c: Test program that records a simple animation.
configure.ac src/Makefile.am: Add machinery to conditionally build
ShellRecorder.
tools/build/gnome-shell-build-setup.sh: Add gstreamer packages
to the list of required packages for Fedora.
js/ui/main.js: Hook up the recorder to a MetaScreen ::toggle-recording
keybinding.
http://bugzilla.gnome.org/show_bug.cgi?id=575290
