1 Nageru is a live video mixer, based around the standard M/E workflow.
6 - High performance on modest hardware (720p60 with two input streams
7 on my Thinkpad X240[1]); almost all pixel processing is done on the GPU.
9 - High output quality; Lanczos3 scaling, subpixel precision everywhere,
10 white balance adjustment, mix of 16- and 32-bit floating point
11 for intermediate calculations, dithered output, optional 10-bit input
14 - Proper sound support: Syncing of multiple unrelated sources through
15 high-quality resampling, multichannel mixing with separate effects
16 per-bus, cue out for headphones, dynamic range compression,
17 three-band graphical EQ (pluss a fixed low-cut), level meters conforming
18 to EBU R128, automation via MIDI controllers.
20 - Theme engine encapsulating the design demands of each individual
21 event; Lua code is responsible for setting up the pixel processing
22 pipelines, running transitions etc., so that the visual look is
23 consistent between operators.
25 - HTML rendering (through Chromium Embedded Framework), for high-quality
26 and flexible overlay or other graphics.
28 - Comprehensive monitoring through Prometheus metrics.
30 [1] For reference, that is: Core i7 4600U (dualcore 2.10GHz, clocks down
31 to 800 MHz after 30 seconds due to thermal constraints), Intel HD Graphics
32 4400 (ie., without the extra L4 cache from Iris Pro), single-channel DDR3 RAM
33 (so 12.8 GB/sec theoretical memory bandwidth, shared between CPU and GPU).
36 Nageru currently needs:
38 - An Intel processor with Intel Quick Sync, or otherwise some hardware
39 H.264 encoder exposed through VA-API. Note that you can use VA-API over
40 DRM instead of X11, to use a non-Intel GPU for rendering but still use
41 Quick Sync (Nageru does this automatically for you if needed).
43 - Two or more Blackmagic USB3 or PCI cards, either HDMI or SDI.
44 The PCI cards need Blackmagic's own drivers installed. The USB3 cards
45 are driven through the “bmusb” driver, using libusb-1.0. If you want
46 zerocopy USB, you need libusb 1.0.21 or newer, as well as a recent
47 kernel (4.6.0 or newer). Zerocopy USB helps not only for performance,
48 but also for stability. You need at least version 0.7.0.
50 - Movit, my GPU-based video filter library (https://movit.sesse.net).
51 You will need at least version 1.5.2.
53 - Qt 5.5 or newer for the GUI.
55 - QCustomPlot for the histogram display in the frame analyzer.
57 - libmicrohttpd for the embedded web server.
59 - x264 for encoding high-quality video suitable for streaming to end users.
61 - ffmpeg for muxing, and for encoding audio. You will need at least
64 - Working OpenGL; Movit works with almost any modern OpenGL implementation.
65 Nageru has been tested with Intel on Mesa (you want 11.2 or newer, due
66 to critical stability bugfixes), and with NVIDIA's proprietary drivers.
67 The status of AMD's proprietary drivers is currently unknown.
69 - libzita-resampler, for resampling sound sources so that they are in sync
70 between sources, and also for oversampling for the peak meter.
72 - LuaJIT, for driving the theme engine.
74 - Optional: CEF (Chromium Embedded Framework), for HTML graphics.
75 If you build without CEF, the HTMLInput class will not be available from
76 the theme. You can get binary downloads of CEF from
78 http://opensource.spotify.com/cefbuilds/index.html
80 Simply download the right build for your platform (the “minimal” build
81 is fine) and add CEF_DIR=<path>/cef_binary_X.XXXX.XXXX.XXXXXXXX_linux64
82 on the make command line (substituting X with the real version as required).
85 If on Debian stretch or something similar, you can install everything you need
88 apt install qtbase5-dev libqt5opengl5-dev qt5-default libqcustomplot-dev \
89 pkg-config libmicrohttpd-dev libusb-1.0-0-dev libluajit-5.1-dev \
90 libzita-resampler-dev libva-dev libavcodec-dev libavformat-dev \
91 libswscale-dev libavresample-dev libmovit-dev libegl1-mesa-dev \
92 libasound2-dev libx264-dev libbmusb-dev protobuf-compiler \
95 Exceptions as of April 2018:
97 - You will need Movit from testing or unstable; stretch only has 1.4.0.
99 - You will need bmusb from testing or unstable; stretch only has 0.5.4.
101 - Debian does not carry CEF (but it is optional). You can get experimental
102 (and not security-supported) CEF Debian packages built for unstable at
103 http://storage.sesse.net/cef/, and then build Nageru with
105 make CEF_DIR=/usr/lib/x86_64-linux-gnu/cef CEF_BUILD_TYPE=system CEF_NO_ICUDTL=yes
107 The patches/ directory contains a patch that helps zita-resampler performance.
108 It is meant for upstream, but was not in at the time Nageru was released.
109 It is taken to be by Steinar H. Gunderson <sesse@google.com> (ie., my ex-work
110 email), and under the same license as zita-resampler itself.
112 To start it, just hook up your equipment, type “make” and then “./nageru”.
113 It is strongly recommended to have the rights to run at real-time priority;
114 it will make the USB3 threads do so, which will make them a lot more stable.
115 (A reasonable hack for testing is probably just to run it as root using sudo,
116 although you might not want to do that in production.) Note also that if you
117 are running a desktop compositor, it will steal significant amounts of GPU
118 performance. The same goes for PulseAudio.
120 Nageru will open a HTTP server at port 9095, where you can extract a live
121 H264+PCM signal in nut mux (e.g. http://127.0.0.1:9095/stream.nut).
122 It is probably too high bitrate (~25 Mbit/sec depending on content) to send to
123 users, but you can easily send it around in your internal network and then
124 transcode it in e.g. VLC. A copy of the stream (separately muxed) will also
125 be saved live to local disk.
127 If you have a fast CPU (typically a quadcore desktop; most laptops will spend
128 most of their CPU on running Nageru itself), you can use x264 for the outgoing
129 stream instead of Quick Sync; it is much better quality for the same bitrate,
130 and also has proper bitrate controls. Simply add --http-x264-video on the
131 command line. (You may also need to add something like "--x264-preset veryfast",
132 since the default "medium" preset might be too CPU-intensive, but YMMV.)
133 The stream saved to disk will still be the Quick Sync-encoded stream, as it is
134 typically higher bitrate and thus also higher quality. Note that if you add
135 ".metacube" at the end of the URL (e.g. "http://127.0.0.1:9095/stream.ts.metacube"),
136 you will get a stream suitable for streaming through the Cubemap video reflector
137 (cubemap.sesse.net). A typical example would be:
139 ./nageru --http-x264-video --x264-preset veryfast --x264-tune film \
140 --http-mux mp4 --http-audio-codec libfdk_aac --http-audio-bitrate 128
142 If you are comfortable with using all your remaining CPU power on the machine
143 for x264, try --x264-speedcontrol, which will try to adjust the preset
144 dynamically for maximum quality, at the expense of somewhat higher delay.
146 See --help for more information on options in general.
148 The name “Nageru” is a play on the Japanese verb 投げる (nageru), which means
149 to throw or cast. (I also later learned that it could mean to face defeat or
150 give up, but that's not the intended meaning.)
153 Nageru's home page is at https://nageru.sesse.net/, where you can also find
154 contact information, full documentation and link to the latest version.
157 Legalese: TL;DR: Everything is GPLv3-or-newer compatible, and see
158 Intel's copyright license at quicksync_encoder.h.
161 Nageru is Copyright (C) 2015 Steinar H. Gunderson <steinar+nageru@gunderson.no>.
162 Portions Copyright (C) 2003 Rune Holm.
163 Portions Copyright (C) 2010-2015 Fons Adriaensen <fons@linuxaudio.org>.
164 Portions Copyright (C) 2012-2015 Fons Adriaensen <fons@linuxaudio.org>.
165 Portions Copyright (C) 2008-2015 Fons Adriaensen <fons@linuxaudio.org>.
166 Portions Copyright (c) 2007-2013 Intel Corporation. All Rights Reserved.
169 This program is free software: you can redistribute it and/or modify
170 it under the terms of the GNU General Public License as published by
171 the Free Software Foundation, either version 3 of the License, or
172 (at your option) any later version.
174 This program is distributed in the hope that it will be useful,
175 but WITHOUT ANY WARRANTY; without even the implied warranty of
176 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
177 GNU General Public License for more details.
179 You should have received a copy of the GNU General Public License
180 along with this program. If not, see <http://www.gnu.org/licenses/>.
183 Portions of quicksync_encoder.h and quicksync_encoder.cpp:
185 Copyright (c) 2007-2013 Intel Corporation. All Rights Reserved.
187 Permission is hereby granted, free of charge, to any person obtaining a
188 copy of this software and associated documentation files (the
189 "Software"), to deal in the Software without restriction, including
190 without limitation the rights to use, copy, modify, merge, publish,
191 distribute, sub license, and/or sell copies of the Software, and to
192 permit persons to whom the Software is furnished to do so, subject to
193 the following conditions:
195 The above copyright notice and this permission notice (including the
196 next paragraph) shall be included in all copies or substantial portions
199 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
200 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
201 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
202 IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
203 ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
204 TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
205 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
208 All files in decklink/:
210 Copyright (c) 2009 Blackmagic Design
211 Copyright (c) 2015 Blackmagic Design
213 Permission is hereby granted, free of charge, to any person or organization
214 obtaining a copy of the software and accompanying documentation covered by
215 this license (the "Software") to use, reproduce, display, distribute,
216 execute, and transmit the Software, and to prepare derivative works of the
217 Software, and to permit third-parties to whom the Software is furnished to
218 do so, all subject to the following:
220 The copyright notices in the Software and this entire statement, including
221 the above license grant, this restriction and the following disclaimer,
222 must be included in all copies of the Software, in whole or in part, and
223 all derivative works of the Software, unless such copies or derivative
224 works are solely in the form of machine-executable object code generated by
225 a source language processor.
227 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
228 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
229 FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
230 SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
231 FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
232 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
233 DEALINGS IN THE SOFTWARE.
236 Marked parts of theme.cpp (Lua shims):
238 The MIT License (MIT)
240 Copyright (c) 2013 Hisham Muhammad
242 Permission is hereby granted, free of charge, to any person obtaining a copy of
243 this software and associated documentation files (the "Software"), to deal in
244 the Software without restriction, including without limitation the rights to
245 use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
246 the Software, and to permit persons to whom the Software is furnished to do so,
247 subject to the following conditions:
249 The above copyright notice and this permission notice shall be included in all
250 copies or substantial portions of the Software.
252 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
253 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
254 FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
255 COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
256 IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
257 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.