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 - libmicrohttpd for the embedded web server.
58 - x264 for encoding high-quality video suitable for streaming to end users.
60 - FFmpeg for muxing, and for encoding audio. You will need at least
63 - Working OpenGL; Movit works with almost any modern OpenGL implementation.
64 Nageru has been tested with Intel on Mesa (you want 11.2 or newer, due
65 to critical stability bugfixes), and with NVIDIA's proprietary drivers.
66 The status of AMD's proprietary drivers is currently unknown.
68 - libzita-resampler, for resampling sound sources so that they are in sync
69 between sources, and also for oversampling for the peak meter.
71 - LuaJIT, for driving the theme engine. You will need at least version 2.1.
73 - libjpeg, for encoding MJPEG streams when VA-API JPEG support is not
76 - Protocol Buffers (protobuf), for storing various forms of settings and
79 - Meson, for building.
81 - Optional: CEF (Chromium Embedded Framework), for HTML graphics.
82 If you build without CEF, the HTMLInput class will not be available from
83 the theme. You can get binary downloads of CEF from
85 http://opensource.spotify.com/cefbuilds/index.html
87 Simply download the right build for your platform (the “minimal” build
88 is fine) and add -Dcef_dir=<path>/cef_binary_X.XXXX.XXXX.XXXXXXXX_linux64
89 on the meson command line (substituting X with the real version as required).
91 - Optional: libsrt, for SRT inputs (by default, Nageru will listen on
92 port 9710, although you can change this port on the command line,
93 turn it off with --srt-port -1, or turn it off live in the UI).
94 If you build with libsrt, make sure it is not linked to OpenSSL,
97 - Optional: SVT-AV1, for encoding high-quality video suitable for streaming to
98 end users (higher quality than using x264, but not nearly as mature).
99 You will need at least version 1.0.0.
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 bullseye or something similar, you can install everything you need
113 apt install qtbase5-dev libqt5opengl5-dev qt5-default \
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
128 - Debian's SVT-AV1 is too old, so you will need to compile it yourself
129 if you wish to use it for streaming.
132 The patches/ directory contains a patch that helps zita-resampler performance.
133 It is meant for upstream, but was not in at the time Nageru was released.
134 It is taken to be by Steinar H. Gunderson <sesse@google.com> (ie., my ex-work
135 email), and under the same license as zita-resampler itself.
137 Nageru and Futatabi use Meson to build. For a default build (building both),
140 meson obj && cd obj && ninja
142 To start Nageru, just hook up your equipment, and then type “./nageru”.
143 For Futatabi documentation, please see https://nageru.sesse.net/doc/.
145 It is strongly recommended to have the rights to run at real-time priority;
146 it will make the USB3 threads do so, which will make them a lot more stable.
147 (A reasonable hack for testing is probably just to run it as root using sudo,
148 although you might not want to do that in production.) Note also that if you
149 are running a desktop compositor, it will steal significant amounts of GPU
150 performance. The same goes for PulseAudio.
152 Nageru will open a HTTP server at port 9095, where you can extract a live
153 H264+PCM signal in nut mux (e.g. http://127.0.0.1:9095/stream.nut).
154 It is probably too high bitrate (~25 Mbit/sec depending on content) to send to
155 users, but you can easily send it around in your internal network and then
156 transcode it in e.g. VLC. A copy of the stream (separately muxed) will also
157 be saved live to local disk.
159 If you have a fast CPU (typically a quadcore desktop; most laptops will spend
160 most of their CPU on running Nageru itself), you can use x264 for the outgoing
161 stream instead of Quick Sync; it is much better quality for the same bitrate,
162 and also has proper bitrate controls. Simply add --http-x264-video on the
163 command line. (You may also need to add something like "--x264-preset veryfast",
164 since the default "medium" preset might be too CPU-intensive, but YMMV.)
165 The stream saved to disk will still be the Quick Sync-encoded stream, as it is
166 typically higher bitrate and thus also higher quality. Note that if you add
167 ".metacube" at the end of the URL (e.g. "http://127.0.0.1:9095/stream.ts.metacube"),
168 you will get a stream suitable for streaming through the Cubemap video reflector
169 (cubemap.sesse.net). A typical example would be:
171 ./nageru --http-x264-video --x264-preset veryfast --x264-tune film \
172 --http-mux mp4 --http-audio-codec libfdk_aac --http-audio-bitrate 128
174 If you are comfortable with using all your remaining CPU power on the machine
175 for x264, try --x264-speedcontrol, which will try to adjust the preset
176 dynamically for maximum quality, at the expense of somewhat higher delay.
178 See --help for more information on options in general.
180 The name “Nageru” is a play on the Japanese verb 投げる (nageru), which means
181 to throw or cast. (I also later learned that it could mean to face defeat or
182 give up, but that's not the intended meaning.)
184 The name “Futatabi” comes from the Japanese adverb 再び (futatabi), which means
185 “again” or “for the second time”.
188 Nageru's home page is at https://nageru.sesse.net/, where you can also find
189 contact information, full documentation and link to the latest version.
192 Legalese: TL;DR: Everything is GPLv3-or-newer compatible, and see
193 Intel's copyright license at quicksync_encoder.h.
196 Nageru is Copyright (C) 2015 Steinar H. Gunderson <steinar+nageru@gunderson.no>.
197 Portions Copyright (C) 2003 Rune Holm.
198 Portions Copyright (C) 2010-2015 Fons Adriaensen <fons@linuxaudio.org>.
199 Portions Copyright (C) 2012-2015 Fons Adriaensen <fons@linuxaudio.org>.
200 Portions Copyright (C) 2008-2015 Fons Adriaensen <fons@linuxaudio.org>.
201 Portions Copyright (c) 2007-2013 Intel Corporation. All Rights Reserved.
202 Portions Copyright (C) 2019 Yngve Molnes.
205 This program is free software: you can redistribute it and/or modify
206 it under the terms of the GNU General Public License as published by
207 the Free Software Foundation, either version 3 of the License, or
208 (at your option) any later version.
210 This program is distributed in the hope that it will be useful,
211 but WITHOUT ANY WARRANTY; without even the implied warranty of
212 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
213 GNU General Public License for more details.
215 You should have received a copy of the GNU General Public License
216 along with this program. If not, see <http://www.gnu.org/licenses/>.
219 Portions of quicksync_encoder.h and quicksync_encoder.cpp:
221 Copyright (c) 2007-2013 Intel Corporation. All Rights Reserved.
223 Permission is hereby granted, free of charge, to any person obtaining a
224 copy of this software and associated documentation files (the
225 "Software"), to deal in the Software without restriction, including
226 without limitation the rights to use, copy, modify, merge, publish,
227 distribute, sub license, and/or sell copies of the Software, and to
228 permit persons to whom the Software is furnished to do so, subject to
229 the following conditions:
231 The above copyright notice and this permission notice (including the
232 next paragraph) shall be included in all copies or substantial portions
235 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
236 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
237 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
238 IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
239 ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
240 TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
241 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
244 All files in decklink/:
246 Copyright (c) 2009 Blackmagic Design
247 Copyright (c) 2015 Blackmagic Design
249 Permission is hereby granted, free of charge, to any person or organization
250 obtaining a copy of the software and accompanying documentation covered by
251 this license (the "Software") to use, reproduce, display, distribute,
252 execute, and transmit the Software, and to prepare derivative works of the
253 Software, and to permit third-parties to whom the Software is furnished to
254 do so, all subject to the following:
256 The copyright notices in the Software and this entire statement, including
257 the above license grant, this restriction and the following disclaimer,
258 must be included in all copies of the Software, in whole or in part, and
259 all derivative works of the Software, unless such copies or derivative
260 works are solely in the form of machine-executable object code generated by
261 a source language processor.
263 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
264 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
265 FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
266 SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
267 FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
268 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
269 DEALINGS IN THE SOFTWARE.