+Nageru 1.7.2, April 28th, 2018
+
+ - Several improvements to video (FFmpeg) inputs: You can now use
+ them as audio sources, you can right-click on video channels
+ to change URL/filename on-the-fly, themes can ask for forced
+ disconnection (useful for network sources that are hanging),
+ and various other improvements. Be aware that the audio support
+ may still be somewhat rough, as A/V sync of arbitrary video
+ playout is a hard problem.
+
+ - The included themes have been fixed to properly make the returned
+ chain preparation functions independent of global state (e.g. if
+ the white balance for a channel was changed before the frame was
+ actually rendered). If you are using a custom theme, you may want
+ to apply similar fixes to it.
+
+ - In Metacube stream output, mark each keyframe with a pts metadata
+ block. This allows Cubemap 1.4.0 or newer to serve fMP4 fragments
+ for HLS from Nageru's output, without any further remuxing or
+ transcoding.
+
+ - If needed, Nageru will now automatically try to autodetect a
+ usable --va-display parameter by probing all DRM nodes for H.264
+ encoders. This removes the need to set --va-display in almost all
+ cases, and also removes the dependency on libpci.
+
+ - For GPUs that support querying available memory (in practice only
+ NVIDIA GPUs at the current time), expose the amount of used/total
+ GPU memory both on standard output and in the Prometheus metrics
+ (as well as included Grafana dashboard).
+
+ - The Grafana dashboard now supports heatmaps for the chosen x264
+ speedcontrol preset (requires Grafana 5.1 or newer). (There used to
+ be a heatmap earlier, but it was all broken.)
+
+ - Various bugfixes.
+
+
+Nageru 1.7.1, March 26th, 2018
+
+ - Various bugfixes, mostly related to HTML and video inputs.
+
+
+Nageru 1.7.0, March 8th, 2018
+
+ - Support for HTML5 graphics directly in Nageru, through CEF
+ (Chromium Embedded Framework). This performs better and is more
+ flexible than integrating with CasparCG over a socket. Note that
+ CEF is an optional component; see the documentation for more
+ information.
+
+ - Add an HTTP endpoint for enumerating channels and one for getting
+ only their colors. Intended for remote tally applications;
+ set the documentation.
+
+ - Add a video grid display that removes the audio controls and shows
+ the video channels only, potentially in multiple rows if that makes
+ for a larger viewing area.
+
+ - Themes can now present simple menus in the Nageru UI. See the
+ documentation for more information.
+
+ - Various bugfixes.
+
+
+Nageru 1.6.4, January 25th, 2018
+
+ - Fix compilation with the upcoming FFmpeg 3.5.
+
+ - Switch to LuaJIT for the theme engine, which is faster.
+
+ - Various bugfixes and smaller optimizations.
+
+
+Nageru 1.6.3, November 8th, 2017
+
+ - Add quick-cut keys (Q, W, E, etc.) below the preview keys.
+ Since it's easy to hit these by accident and put up a signal
+ you didn't want, they are disabled by default (they can be
+ enabled in the video menu, or with the command line flag
+ --quick-cut-keys).
+
+ - Rework the x264 speedcontrol presets to better match newer
+ x264 versions.
+
+ - Add an option for changing the HTTP port (--http-port).
+
+ - Various smaller bug and integration fixes.
+
+
+Nageru 1.6.2, July 16th, 2017
+
+ - Various smaller Kaeru fixes, mostly around metrics. Also,
+ you can now adjust the x264 bitrate in Kaeru (in 100 kbit/sec
+ increments) by sending SIGUSR1 (higher) or SIGUSR2 (lower).
+
+
+Nageru 1.6.1, July 9th, 2017
+
+ - Add native export of Prometheus metrics.
+
+ - Rework the frame queue drop algorithm. The new one should handle tricky
+ situations much better, especially when a card is drifting very slowly
+ against the master timer.
+
+ - Add Kaeru, an experimental transcoding tool based on Nageru code.
+ Kaeru can run headless on a server without a GPU to transcode a
+ Nageru stream into a lower-bitrate one, replacing VLC.
+
+ - Work around a bug in some versions of NVIDIA's OpenGL drivers that would
+ crash Nageru after about three hours (fix in cooperation with Movit).
+
+ - Fix a crash with i965-va-driver 1.8.x.
+
+ - Reduce mutex contention in certain critical places, causing lower tail
+ latency in the mixer.
+
+
+Nageru 1.6.0, May 29th, 2017
+
+ - Add support for having videos (from file or from URL) as a separate
+ input channels, albeit with some limitations. Apart from the obvious use of
+ looping pause clips or similar, this can be used to integrate with CasparCG;
+ see the manual for more details.
+
+ - Add a frame analyzer (accessible from the Video menu) containing an
+ RGB histogram and a color dropped tool. This is useful in calibrating
+ video chains by playing back a known signal. Note that this adds a
+ dependency on QCustomPlot.
+
+ - Allow overriding Y'CbCr input interpretation, for inputs that don't
+ use the correct settings. Also, Rec. 601 is now used by default instead
+ of Rec. 709 for SD resolutions.
+
+ - Support other sample rates than 48000 Hz from bmusb.
+
+
+Nageru 1.5.0, April 5th, 2017
+
+ - Support for low-latency HDMI/SDI output in addition to (or instead of) the
+ stream. This currently only works with DeckLink cards, not bmusb. See the
+ manual for more information.
+
+ - Support changing the resolution from the command line, instead of locking
+ everything to 1280x720.
+
+ - The A/V sync code has been rewritten to be more in line with Fons
+ Adriaensen's original paper. It handles several cases much better,
+ in particular when trying to match 59.94 and 60 Hz sources to each other.
+ However, it might occasionally need a few extra seconds on startup to
+ lock properly if startup is slow.
+
+ - Add support for using x264 for the disk recording. This makes it possible,
+ among other things, to run Nageru on a machine entirely without VA-API
+ support.
+
+ - Support for 10-bit Y'CbCr, both on input and output. (Output requires
+ x264 disk recording, as Quick Sync Video does not support 10-bit H.264.)
+ This requires compute shader support, and is in general a little bit
+ slower on input and output, due to the extra amount of data being shuffled
+ around. Intermediate precision is 16-bit floating-point or better,
+ as before.
+
+ - Enable input mode autodetection for DeckLink cards that support it.
+ (bmusb mode has always been autodetected.)
+
+ - Add functionality to add a time code to the stream; useful for debugging
+ latency.
+
+ - The live display is now both more performant and of higher image quality.
+
+ - Fix a long-standing issue where the preview displays would be too bright
+ when using an NVIDIA GPU. (This did not affect the finished stream.)
+
+ - Many other bugfixes and small improvements.
+
+
+Nageru 1.4.2, November 24th, 2016
+
+ - Fix a thread race that would sometimes cause x264 streaming to go awry.
+
+
+Nageru 1.4.1, November 6th, 2016
+
+ - Various bugfixes.
+
+
+Nageru 1.4.0, October 26th, 2016
+
+ - Support for multichannel (or more accurately, multi-bus) audio,
+ choosable from the UI or using the --multichannel command-line
+ flag. In multichannel mode, you can take in inputs from multiple
+ different sources (or different channels on the same source, for
+ multichannel sound cards), apply effects to them separately and then
+ mix them together. This includes both audio from the video cards
+ as well as ALSA inputs, including hotplug. Ola Gundelsby contributed
+ invaluable feedback on this feature throughout the entire
+ development cycle.
+
+ - Support for having MIDI controllers control various aspects of the
+ audio UI, with relatively flexible mapping. Note that different
+ MIDI controllers can vary significantly in what protocol they speak,
+ so Nageru will not necessarily work with all. (The primary testing
+ controller has been the Akai MIDImix, and a pre-made mapping for
+ that is included. The Korg nanoKONTROL2 has also been tested and
+ works, but it requires some Korg-specific SysEx commands to make
+ the buttons and lights work.)
+
+ - Add a disk space indicator to the main window.
+
+ - Various bugfixes. In particular, an issue where the audio would pitch
+ up sharply after a series of many dropped frames has been fixed.
+
+
+Nageru 1.3.4, August 2nd, 2016
+
+ - Various bugfixes.
+
+
+Nageru 1.3.3, July 27th, 2016
+
+ - Various changes to make distribution packaging easier; in particular,
+ theme data can be picked up from /usr/local/share/nageru.
+
+ - Fix various FFmpeg deprecation warnings, now that we need FFmpeg
+ 3.1 for other reasons anyway.
+
+
+Nageru 1.3.2, July 23rd, 2016
+
+ - Allow limited hotplugging (unplugging and replugging) of USB cards.
+ You can use the new command-line option --num-fake-cards (-C) to add
+ fake cards that show only a single color and that will be replaced
+ by real cards as you plug them in; you can also unplug cards and have
+ them be replaced by fake cards. Fake cards can also be used for testing
+ Nageru without actually having any video cards available.
+
+ - Add Metacube timestamping of every keyframe, for easier detection of
+ streams not keeping up. Works with the new timestamp feature of
+ Cubemap 1.3.1. Will be ignored (save for some logging) in older
+ Cubemap versions.
+
+ - The included default theme has been reworked and cleaned up to be
+ more understandable and extensible.
+
+ - Add more command-line options for initial audio setup.
+
+
+Nageru 1.3.1, July 1st, 2016
+
+ - Various display bugfixes.
+
+
+Nageru 1.3.0, June 26th, 2016
+
+ - It is now possible, given enough CPU power (e.g., a quad-core Haswell or
+ faster desktop CPU), to output a stream that is suitable for streaming
+ directly to end users without further transcoding. In particular, this
+ includes support for encoding the network stream with x264 (the stream
+ saved to disk is still done using Quick Sync), for Metacube framing (for
+ streaming to the Cubemap reflector), and for choosing the network stream
+ mux. For more information, see the README.
+
+ - Add a flag (--disable-alsa-output) to disable ALSA monitoring output.
+
+ - Do texture uploads from the main thread instead of from separate threads;
+ may or may not improve stability with NVIDIA's proprietary drivers.
+
+ - When beginning a new video segment, the shutdown of the old encoder
+ is now done in a background thread, in order to not disturb the external
+ stream. The audio still goes into a somewhat random stream, though.
+
+ - You can now override the default stream-to-card mapping with --map-signal=
+ on the command line.
+
+ - Nageru now tries to lock itself into RAM if it has the permissions to do
+ so, for better realtime behavior. (Writing the stream to disk tends to
+ fill the buffer cache, eventually paging less-used parts of Nageru out.)
+
+ - Various fixes for deadlocks, memory leaks, and many other errors.
+
+
+Nageru 1.2.1, April 15th, 2016
+
+ - Images are now updated from disk about every second, so that it is possible
+ to update e.g. overlays during streaming, although somewhat slowly.
+
+ - Fix support for PNG images.
+
+ - You can now send SIGHUP to start a new cut instead of using the menu.
+
+ - Added a --help option.
+
+ - Various tweaks to OpenGL fence handling.
+
+
Nageru 1.2.0, April 6th, 2016
- Support for Blackmagic's PCI and Thunderbolt cards, using the official
projects / nageru / blobdiff