Commit Graph

7 Commits

Author SHA1 Message Date
Jonas Dreßler
51bf7ec176 screencastService: Improve the gstreamer pipeline for recording
The current gstreamer pipeline performs quite bad on slower machines and
is dropping lots of frames, improve the pipeline by changing a few
things:

- Use threads for videoconvert and improve speed of videoconvert by
disabling some unneeded things
- Add a queue before the encoding step, this allows the encoder to work
at its own pace and will lead to a lot more stability
- Remove the fixed quantizer and only set a max quantizer, this helps
quite a bit with performance
- Change the deadline parameter of vp8enc to 1: This makes the encoder
go into real time mode, which will make it a lot faster
- Set cpu-used to 16, the maximum possible value.
- Set static-threshold to 1000, static-threshold is the motion detection
threshold, and while a value of 100 is recommended for screencasting in
the gstreamer documentation (see [1]), using 1000 appears to perform a
lot better and still outputs fairly good quality
- Set a larger buffer size than the default size, this seems to get a
bit more stability during high load scenarios

All in all, those changes make the pipeline drop no more frames when
recording at 30 FPS and 2K screen resolution. That was tested on a
fairly recent mobile core-i5 processor.

Also, because we now have two %T replacement strings for the number of
threads, we need to switch to replaceAll(). For that to work, we have to
put the %T matching expression into quotes.

[1] https://gstreamer.freedesktop.org/documentation/vpx/GstVPXEnc.html?gi-language=c#GstVPXEnc:static-threshold

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1633>
2021-05-04 13:45:57 +00:00
Florian Müllner
2e9a2e68b7 dbusServices/screencast: Use GTK4
The separate screencast service has some minimal GTK usage, which
we can trivially move to GTK4.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1591>
2021-01-25 21:09:22 +01:00
Florian Müllner
8a47f1c667 cleanup: Remove empty leading/trailing lines in blocks
gjs added a new rule to its eslint ruleset that forbids "block padding",
so make sure we conform to that rule before syncing up the configuration.

https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1498
2020-11-16 18:04:23 +00:00
Florian Müllner
386d25e6f8 dbusServices/screencast: Add recordings to recent items
This is useful functionality that got lost when replacing the built-in
recorder with an external screencast service; bring it back.

https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/3171
2020-09-14 21:15:13 +00:00
Florian Müllner
b3f35912be dbusServices/screencast: Save under resolved file path
... instead of using the original template as file name.

https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/3097
2020-09-02 16:28:48 +02:00
Florian Müllner
9d6ccb6072 dbusServices/screencast: Quote filename in pipeline
Otherwise Gst fails to parse the pipeline string if the filename
contains spaces, as all words following the first are interpreted
as additional Gst elements.

https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1403
2020-08-11 11:50:44 +00:00
Jonas Ådahl
2b0731ab81 Move screencasting into a separate service process
Move the screencasting into a separate D-Bus service process, using
PipeWire instead of Clutter API. The service is implemented in
Javascript using the dbusService.js helper, and implements the same API
as was done by screencast.js and the corresponding C code.

https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1372
2020-07-31 10:51:12 +02:00