1 Nageru is a live video mixer, based around the standard M/E workflow.
2 Futatabi is a multicamera slow motion video server.
7 - High performance on modest hardware (720p60 with two input streams
8 on my Thinkpad X240[1]); almost all pixel processing is done on the GPU.
10 - High output quality; Lanczos3 scaling, subpixel precision everywhere,
11 white balance adjustment, mix of 16- and 32-bit floating point
12 for intermediate calculations, dithered output, optional 10-bit input
15 - Proper sound support: Syncing of multiple unrelated sources through
16 high-quality resampling, multichannel mixing with separate effects
17 per-bus, cue out for headphones, dynamic range compression,
18 three-band graphical EQ (pluss a fixed low-cut), level meters conforming
19 to EBU R128, automation via MIDI controllers.
21 - Theme engine encapsulating the design demands of each individual
22 event; Lua code is responsible for setting up the pixel processing
23 pipelines, running transitions etc., so that the visual look is
24 consistent between operators.
26 - HTML rendering (through Chromium Embedded Framework), for high-quality
27 and flexible overlay or other graphics.
29 - Comprehensive monitoring through Prometheus metrics.
31 [1] For reference, that is: Core i7 4600U (dualcore 2.10GHz, clocks down
32 to 800 MHz after 30 seconds due to thermal constraints), Intel HD Graphics
33 4400 (ie., without the extra L4 cache from Iris Pro), single-channel DDR3 RAM
34 (so 12.8 GB/sec theoretical memory bandwidth, shared between CPU and GPU).
37 Nageru currently needs:
39 - An Intel processor with Intel Quick Sync, or otherwise some hardware
40 H.264 encoder exposed through VA-API. Note that you can use VA-API over
41 DRM instead of X11, to use a non-Intel GPU for rendering but still use
42 Quick Sync (Nageru does this automatically for you if needed).
44 - Two or more Blackmagic USB3 or PCI cards, either HDMI or SDI.
45 The PCI cards need Blackmagic's own drivers installed. The USB3 cards
46 are driven through the “bmusb” driver, using libusb-1.0. If you want
47 zerocopy USB, you need libusb 1.0.21 or newer, as well as a recent
48 kernel (4.6.0 or newer). Zerocopy USB helps not only for performance,
49 but also for stability. You need at least version 0.7.4.
51 - Movit, my GPU-based video filter library (https://movit.sesse.net).
52 You will need at least version 1.5.2.
54 - Qt 5.5 or newer for the GUI.
56 - QCustomPlot for the histogram display in the frame analyzer.
58 - libmicrohttpd for the embedded web server.
60 - x264 for encoding high-quality video suitable for streaming to end users.
62 - FFmpeg for muxing, and for encoding audio. You will need at least
65 - Working OpenGL; Movit works with almost any modern OpenGL implementation.
66 Nageru has been tested with Intel on Mesa (you want 11.2 or newer, due
67 to critical stability bugfixes), and with NVIDIA's proprietary drivers.
68 The status of AMD's proprietary drivers is currently unknown.
70 - libzita-resampler, for resampling sound sources so that they are in sync
71 between sources, and also for oversampling for the peak meter.
73 - LuaJIT, for driving the theme engine. You will need at least version 2.1.
75 - libjpeg, for encoding MJPEG streams when VA-API JPEG support is not
78 - Zita-resampler, for adjusting audio to be in sync with video.
80 - Protocol Buffers (protobuf), for storing various forms of settings and
83 - Meson, for building.
85 - Optional: CEF (Chromium Embedded Framework), for HTML graphics.
86 If you build without CEF, the HTMLInput class will not be available from
87 the theme. You can get binary downloads of CEF from
89 http://opensource.spotify.com/cefbuilds/index.html
91 Simply download the right build for your platform (the “minimal” build
92 is fine) and add -Dcef_dir=<path>/cef_binary_X.XXXX.XXXX.XXXXXXXX_linux64
93 on the meson command line (substituting X with the real version as required).
95 - Optional: libsrt, for SRT inputs (by default, Nageru will listen on
96 port 9710, although you can change this port on the command line,
97 turn it off with --srt-port -1, or turn it off live in the UI).
98 If you build with libsrt, make sure it is not linked to OpenSSL,
104 - A fast GPU with OpenGL 4.5 support (GTX 1080 or similar recommended for
105 best quality at HD resolutions, although 950 should work).
107 - SQLite, for storing state.
110 If on Debian bullsey or something similar, you can install everything you need
113 apt install qtbase5-dev libqt5opengl5-dev qt5-default libqcustomplot-dev \
114 pkg-config libmicrohttpd-dev libusb-1.0-0-dev libluajit-5.1-dev \
115 libzita-resampler-dev libva-dev libavcodec-dev libavformat-dev \
116 libswscale-dev libavresample-dev libmovit-dev libegl1-mesa-dev \
117 libasound2-dev libx264-dev libbmusb-dev protobuf-compiler \
118 libprotobuf-dev libsqlite3-dev meson libjpeg-dev libsrt-gnutls-dev
120 Exceptions as of July 2022:
122 - Debian does not carry CEF (but it is optional). You can get experimental
123 (and not security-supported) CEF Debian packages built for unstable at
124 http://storage.sesse.net/cef/, and then configure Nageru with
126 meson obj -Dcef_dir=/usr/lib/x86_64-linux-gnu/cef -Dcef_build_type=system -Dcef_no_icudtl=true
129 The patches/ directory contains a patch that helps zita-resampler performance.
130 It is meant for upstream, but was not in at the time Nageru was released.
131 It is taken to be by Steinar H. Gunderson <sesse@google.com> (ie., my ex-work
132 email), and under the same license as zita-resampler itself.
134 Nageru and Futatabi use Meson to build. For a default build (building both),
137 meson obj && cd obj && ninja
139 To start Nageru, just hook up your equipment, and then type “./nageru”.
140 For Futatabi documentation, please see https://nageru.sesse.net/doc/.
142 It is strongly recommended to have the rights to run at real-time priority;
143 it will make the USB3 threads do so, which will make them a lot more stable.
144 (A reasonable hack for testing is probably just to run it as root using sudo,
145 although you might not want to do that in production.) Note also that if you
146 are running a desktop compositor, it will steal significant amounts of GPU
147 performance. The same goes for PulseAudio.
149 Nageru will open a HTTP server at port 9095, where you can extract a live
150 H264+PCM signal in nut mux (e.g. http://127.0.0.1:9095/stream.nut).
151 It is probably too high bitrate (~25 Mbit/sec depending on content) to send to
152 users, but you can easily send it around in your internal network and then
153 transcode it in e.g. VLC. A copy of the stream (separately muxed) will also
154 be saved live to local disk.
156 If you have a fast CPU (typically a quadcore desktop; most laptops will spend
157 most of their CPU on running Nageru itself), you can use x264 for the outgoing
158 stream instead of Quick Sync; it is much better quality for the same bitrate,
159 and also has proper bitrate controls. Simply add --http-x264-video on the
160 command line. (You may also need to add something like "--x264-preset veryfast",
161 since the default "medium" preset might be too CPU-intensive, but YMMV.)
162 The stream saved to disk will still be the Quick Sync-encoded stream, as it is
163 typically higher bitrate and thus also higher quality. Note that if you add
164 ".metacube" at the end of the URL (e.g. "http://127.0.0.1:9095/stream.ts.metacube"),
165 you will get a stream suitable for streaming through the Cubemap video reflector
166 (cubemap.sesse.net). A typical example would be:
168 ./nageru --http-x264-video --x264-preset veryfast --x264-tune film \
169 --http-mux mp4 --http-audio-codec libfdk_aac --http-audio-bitrate 128
171 If you are comfortable with using all your remaining CPU power on the machine
172 for x264, try --x264-speedcontrol, which will try to adjust the preset
173 dynamically for maximum quality, at the expense of somewhat higher delay.
175 See --help for more information on options in general.
177 The name “Nageru” is a play on the Japanese verb 投げる (nageru), which means
178 to throw or cast. (I also later learned that it could mean to face defeat or
179 give up, but that's not the intended meaning.)
181 The name “Futatabi” comes from the Japanese adverb 再び (futatabi), which means
182 “again” or “for the second time”.
185 Nageru's home page is at https://nageru.sesse.net/, where you can also find
186 contact information, full documentation and link to the latest version.
189 Legalese: TL;DR: Everything is GPLv3-or-newer compatible, and see
190 Intel's copyright license at quicksync_encoder.h.
193 Nageru is Copyright (C) 2015 Steinar H. Gunderson <steinar+nageru@gunderson.no>.
194 Portions Copyright (C) 2003 Rune Holm.
195 Portions Copyright (C) 2010-2015 Fons Adriaensen <fons@linuxaudio.org>.
196 Portions Copyright (C) 2012-2015 Fons Adriaensen <fons@linuxaudio.org>.
197 Portions Copyright (C) 2008-2015 Fons Adriaensen <fons@linuxaudio.org>.
198 Portions Copyright (c) 2007-2013 Intel Corporation. All Rights Reserved.
199 Portions Copyright (C) 2019 Yngve Molnes.
202 This program is free software: you can redistribute it and/or modify
203 it under the terms of the GNU General Public License as published by
204 the Free Software Foundation, either version 3 of the License, or
205 (at your option) any later version.
207 This program is distributed in the hope that it will be useful,
208 but WITHOUT ANY WARRANTY; without even the implied warranty of
209 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
210 GNU General Public License for more details.
212 You should have received a copy of the GNU General Public License
213 along with this program. If not, see <http://www.gnu.org/licenses/>.
216 Portions of quicksync_encoder.h and quicksync_encoder.cpp:
218 Copyright (c) 2007-2013 Intel Corporation. All Rights Reserved.
220 Permission is hereby granted, free of charge, to any person obtaining a
221 copy of this software and associated documentation files (the
222 "Software"), to deal in the Software without restriction, including
223 without limitation the rights to use, copy, modify, merge, publish,
224 distribute, sub license, and/or sell copies of the Software, and to
225 permit persons to whom the Software is furnished to do so, subject to
226 the following conditions:
228 The above copyright notice and this permission notice (including the
229 next paragraph) shall be included in all copies or substantial portions
232 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
233 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
234 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
235 IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
236 ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
237 TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
238 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
241 All files in decklink/:
243 Copyright (c) 2009 Blackmagic Design
244 Copyright (c) 2015 Blackmagic Design
246 Permission is hereby granted, free of charge, to any person or organization
247 obtaining a copy of the software and accompanying documentation covered by
248 this license (the "Software") to use, reproduce, display, distribute,
249 execute, and transmit the Software, and to prepare derivative works of the
250 Software, and to permit third-parties to whom the Software is furnished to
251 do so, all subject to the following:
253 The copyright notices in the Software and this entire statement, including
254 the above license grant, this restriction and the following disclaimer,
255 must be included in all copies of the Software, in whole or in part, and
256 all derivative works of the Software, unless such copies or derivative
257 works are solely in the form of machine-executable object code generated by
258 a source language processor.
260 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
261 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
262 FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
263 SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
264 FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
265 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
266 DEALINGS IN THE SOFTWARE.