Correct a comment in YCbCrConverter.

[nageru] / NEWS

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+Nageru and Futatabi 1.9.3, April 12th, 2020
+
+  - Support (video-only) V4L2 output. The intended use case is output into
+    v4l2loopback to get into videoconferencing or the likes:
+
+     sudo apt install v4l2loopback-dkms
+     sudo modprobe v4l2loopback video_nr=2 card_label='Nageru loopback' max_width=1280 max_height=720 exclusive_caps=1
+     nageru --v4l-output /dev/video2
+   
+   Start Nageru before any readers.
+
+
+Nageru and Futatabi 1.9.2, March 29th, 2020
+
+  - Support handling white balance directly in Nageru, without themes
+    manually inserting a WhiteBalanceEffect or handling set_wb().
+    To use it, call scene:add_white_balance() instead of
+    scene:add_effect(WhiteBalanceEffect.new()). If using this functionality,
+    white balance will be properly propagated to the MJPEG feed and
+    through Futatabi, so that replays get the correct white balance.
+    Futatabi's UI will still be uncorrected, though.
+
+  - Make it possible to siphon out a single MJPEG stream, for remote
+    debugging, single-camera recording, single-camera streaming via
+    Kaeru or probably other things. The URL for this is /feeds/N.mp4
+    where N is the card index (starting from zero).
+
+  - The theme can now access some audio settings; it can get (not set)
+    number of buses and names, get/set fader volume, get/set mute,
+    and get/set EQ parameters.
+
+  - In Futatabi, it is now possible to set custom source labels, with
+    the parameter --source-label NUM:LABEL (or -l NUM:LABEL).
+
+  - When the playback speed changes in Futatabi, ease into the new speed.
+    The easing period is nominally 200 ms, but it will be automatically
+    shortened or lengthened (up to as much as two seconds in extreme
+    cases, especially involving very slight speed change) if this
+    helps getting back into a cadence of hitting the original frames.
+    This can mean significant performance improvements when ramping
+    from higher speeds back into 100%.
+
+  - Updates for newer versions of CEF (tested with Chrome 80).
+
+  - Various bugfixes and performance improvements.
+
+
 Nageru and Futatabi 1.9.1, November 17th, 2019
 
   - Support disabling optional effects if a given other effect is _enabled_