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,
101 - Optional: SVT-AV1, for encoding high-quality video suitable for streaming to
102 end users (higher quality than using x264, but not nearly as mature).
103 You will need at least version 1.0.0.
108 - A fast GPU with OpenGL 4.5 support (GTX 1080 or similar recommended for
109 best quality at HD resolutions, although 950 should work).
111 - SQLite, for storing state.
114 If on Debian bullsey or something similar, you can install everything you need
117 apt install qtbase5-dev libqt5opengl5-dev qt5-default libqcustomplot-dev \
118 pkg-config libmicrohttpd-dev libusb-1.0-0-dev libluajit-5.1-dev \
119 libzita-resampler-dev libva-dev libavcodec-dev libavformat-dev \
120 libswscale-dev libavresample-dev libmovit-dev libegl1-mesa-dev \
121 libasound2-dev libx264-dev libbmusb-dev protobuf-compiler \
122 libprotobuf-dev libsqlite3-dev meson libjpeg-dev libsrt-gnutls-dev
124 Exceptions as of July 2022:
126 - Debian does not carry CEF (but it is optional). You can get experimental
127 (and not security-supported) CEF Debian packages built for unstable at
128 http://storage.sesse.net/cef/, and then configure Nageru with
130 meson obj -Dcef_dir=/usr/lib/x86_64-linux-gnu/cef -Dcef_build_type=system -Dcef_no_icudtl=true
132 - Debian's SVT-AV1 is too old, so you will need to compile it yourself
133 if you wish to use it for streaming.
136 The patches/ directory contains a patch that helps zita-resampler performance.
137 It is meant for upstream, but was not in at the time Nageru was released.
138 It is taken to be by Steinar H. Gunderson <sesse@google.com> (ie., my ex-work
139 email), and under the same license as zita-resampler itself.
141 Nageru and Futatabi use Meson to build. For a default build (building both),
144 meson obj && cd obj && ninja
146 To start Nageru, just hook up your equipment, and then type “./nageru”.
147 For Futatabi documentation, please see https://nageru.sesse.net/doc/.
149 It is strongly recommended to have the rights to run at real-time priority;
150 it will make the USB3 threads do so, which will make them a lot more stable.
151 (A reasonable hack for testing is probably just to run it as root using sudo,
152 although you might not want to do that in production.) Note also that if you
153 are running a desktop compositor, it will steal significant amounts of GPU
154 performance. The same goes for PulseAudio.
156 Nageru will open a HTTP server at port 9095, where you can extract a live
157 H264+PCM signal in nut mux (e.g. http://127.0.0.1:9095/stream.nut).
158 It is probably too high bitrate (~25 Mbit/sec depending on content) to send to
159 users, but you can easily send it around in your internal network and then
160 transcode it in e.g. VLC. A copy of the stream (separately muxed) will also
161 be saved live to local disk.
163 If you have a fast CPU (typically a quadcore desktop; most laptops will spend
164 most of their CPU on running Nageru itself), you can use x264 for the outgoing
165 stream instead of Quick Sync; it is much better quality for the same bitrate,
166 and also has proper bitrate controls. Simply add --http-x264-video on the
167 command line. (You may also need to add something like "--x264-preset veryfast",
168 since the default "medium" preset might be too CPU-intensive, but YMMV.)
169 The stream saved to disk will still be the Quick Sync-encoded stream, as it is
170 typically higher bitrate and thus also higher quality. Note that if you add
171 ".metacube" at the end of the URL (e.g. "http://127.0.0.1:9095/stream.ts.metacube"),
172 you will get a stream suitable for streaming through the Cubemap video reflector
173 (cubemap.sesse.net). A typical example would be:
175 ./nageru --http-x264-video --x264-preset veryfast --x264-tune film \
176 --http-mux mp4 --http-audio-codec libfdk_aac --http-audio-bitrate 128
178 If you are comfortable with using all your remaining CPU power on the machine
179 for x264, try --x264-speedcontrol, which will try to adjust the preset
180 dynamically for maximum quality, at the expense of somewhat higher delay.
182 See --help for more information on options in general.
184 The name “Nageru” is a play on the Japanese verb 投げる (nageru), which means
185 to throw or cast. (I also later learned that it could mean to face defeat or
186 give up, but that's not the intended meaning.)
188 The name “Futatabi” comes from the Japanese adverb 再び (futatabi), which means
189 “again” or “for the second time”.
192 Nageru's home page is at https://nageru.sesse.net/, where you can also find
193 contact information, full documentation and link to the latest version.
196 Legalese: TL;DR: Everything is GPLv3-or-newer compatible, and see
197 Intel's copyright license at quicksync_encoder.h.
200 Nageru is Copyright (C) 2015 Steinar H. Gunderson <steinar+nageru@gunderson.no>.
201 Portions Copyright (C) 2003 Rune Holm.
202 Portions Copyright (C) 2010-2015 Fons Adriaensen <fons@linuxaudio.org>.
203 Portions Copyright (C) 2012-2015 Fons Adriaensen <fons@linuxaudio.org>.
204 Portions Copyright (C) 2008-2015 Fons Adriaensen <fons@linuxaudio.org>.
205 Portions Copyright (c) 2007-2013 Intel Corporation. All Rights Reserved.
206 Portions Copyright (C) 2019 Yngve Molnes.
209 This program is free software: you can redistribute it and/or modify
210 it under the terms of the GNU General Public License as published by
211 the Free Software Foundation, either version 3 of the License, or
212 (at your option) any later version.
214 This program is distributed in the hope that it will be useful,
215 but WITHOUT ANY WARRANTY; without even the implied warranty of
216 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
217 GNU General Public License for more details.
219 You should have received a copy of the GNU General Public License
220 along with this program. If not, see <http://www.gnu.org/licenses/>.
223 Portions of quicksync_encoder.h and quicksync_encoder.cpp:
225 Copyright (c) 2007-2013 Intel Corporation. All Rights Reserved.
227 Permission is hereby granted, free of charge, to any person obtaining a
228 copy of this software and associated documentation files (the
229 "Software"), to deal in the Software without restriction, including
230 without limitation the rights to use, copy, modify, merge, publish,
231 distribute, sub license, and/or sell copies of the Software, and to
232 permit persons to whom the Software is furnished to do so, subject to
233 the following conditions:
235 The above copyright notice and this permission notice (including the
236 next paragraph) shall be included in all copies or substantial portions
239 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
240 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
241 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
242 IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
243 ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
244 TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
245 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
248 All files in decklink/:
250 Copyright (c) 2009 Blackmagic Design
251 Copyright (c) 2015 Blackmagic Design
253 Permission is hereby granted, free of charge, to any person or organization
254 obtaining a copy of the software and accompanying documentation covered by
255 this license (the "Software") to use, reproduce, display, distribute,
256 execute, and transmit the Software, and to prepare derivative works of the
257 Software, and to permit third-parties to whom the Software is furnished to
258 do so, all subject to the following:
260 The copyright notices in the Software and this entire statement, including
261 the above license grant, this restriction and the following disclaimer,
262 must be included in all copies of the Software, in whole or in part, and
263 all derivative works of the Software, unless such copies or derivative
264 works are solely in the form of machine-executable object code generated by
265 a source language processor.
267 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
268 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
269 FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
270 SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
271 FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
272 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
273 DEALINGS IN THE SOFTWARE.