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.
13 - Proper sound support: Syncing of multiple unrelated sources through
14 high-quality resampling, freely selectable input, cue out for headphones,
15 dynamic range compression, simple EQ (lowpass), level meters conforming
18 - Theme engine encapsulating the design demands of each individual
19 event; Lua code is responsible for setting up the pixel processing
20 pipelines, running transitions etc., so that the visual look is
21 consistent between operators.
23 [1] For reference, that is: Core i7 4600U (dualcore 2.10GHz, clocks down
24 to 800 MHz after 30 seconds due to thermal constraints), Intel HD Graphics
25 4400 (ie., without the extra L4 cache from Iris Pro), single-channel DDR3 RAM
26 (so 12.8 GB/sec theoretical memory bandwidth, shared between CPU and GPU).
29 Nageru is in beta stage. It currently needs:
31 - An Intel processor with Intel Quick Sync, or otherwise some hardware
32 H.264 encoder exposed through VA-API. Note that you can use VA-API over
33 DRM instead of X11, to use a non-Intel GPU for rendering but still use
34 Quick Sync (by giving e.g. “--va-display /dev/dri/card0”).
36 - Two or more Blackmagic USB3 cards, either HDMI or SDI. These are driven
37 through the “bmusb” driver embedded in bmusb/, using libusb-1.0.
38 Note that you will want a recent Linux kernel to avoid LPM (link power
39 management) and bandwidth allocation issues with USB3.
41 - Movit, my GPU-based video filter library (https://movit.sesse.net).
42 You will need at least version 1.3.0.
44 - Qt 5.5 or newer for the GUI.
46 - libmicrohttpd for the embedded web server.
48 - ffmpeg for muxing, and for encoding audio.
50 - Working OpenGL; Movit works with almost any modern OpenGL implementation,
51 but Nageru has been tested with Mesa 10.x and 11.x only (you probably want
54 - libzita-resampler, for resampling sound sources so that they are in sync
55 between sources, and also for oversampling for the peak meter.
57 - Lua, for driving the theme engine.
60 If on Debian stretch or something similar, you can install everything you need
63 git submodule update --init
64 apt install qtbase5-dev qt5-default pkg-config libmicrohttpd-dev \
65 libusb-1.0-0-dev liblua5.2-dev libzita-resampler-dev libva-dev \
66 libavcodec-dev libavformat-dev libswscale-dev libmovit-dev \
67 libegl1-mesa-dev libasound2-dev
70 The patches/ directory contains some patches for upstream software that help
71 Nageru performance and/or stability. They are all meant for upstream, but
72 probably will not be in by the time Nageru is released. All except the bmusb
73 patch are taken to be by Steinar H. Gunderson <sesse@google.com> (ie., my work
74 email, unlike Nageru itself and bmusb), and under the same license as the
77 To start it, just hook up your equipment, type “make” and then “./nageru”.
78 It is strongly recommended to have the rights to run at real-time priority;
79 it will make the USB3 threads do so, which will make them a lot more stable.
80 (A reasonable hack for testing is probably just to run it as root using sudo,
81 although you might not want to do that in production.) Note also that if you
82 are running a desktop compositor, it will steal significant amounts of GPU
83 performance. The same goes for PulseAudio.
85 Nageru will open a HTTP server at port 9095, where you can extract a live
86 H264+PCM signal in QuickTime mux (e.g. http://127.0.0.1:9095/stream.mov).
87 It is probably too high bitrate (~25 Mbit/sec depending on content) to send to
88 users, but you can easily send it around in your internal network and then
89 transcode it in e.g. VLC. A copy of the stream (separately muxed) will also
90 be saved live to local disk.
93 The name “Nageru” is a play on the Japanese verb 投げる (nageru), which means
94 to throw or cast. (I also later learned that it could mean to face defeat or
95 give up, but that's not the intended meaning.)
98 Nageru's home page is at https://nageru.sesse.net/, where you can also find
99 contact information and link to the latest version.
102 Legalese: TL;DR: Everything is GPLv3-or-newer compatible, and see
103 Intel's copyright license at h264encode.h.
106 Nageru is Copyright (C) 2015 Steinar H. Gunderson <steinar+nageru@gunderson.no>.
107 Portions Copyright (C) 2003 Rune Holm.
108 Portions Copyright (C) 2010-2015 Fons Adriaensen <fons@linuxaudio.org>.
109 Portions Copyright (C) 2012-2015 Fons Adriaensen <fons@linuxaudio.org>.
110 Portions Copyright (C) 2008-2015 Fons Adriaensen <fons@linuxaudio.org>.
111 Portions Copyright (c) 2007-2013 Intel Corporation. All Rights Reserved.
114 This program is free software: you can redistribute it and/or modify
115 it under the terms of the GNU General Public License as published by
116 the Free Software Foundation, either version 3 of the License, or
117 (at your option) any later version.
119 This program is distributed in the hope that it will be useful,
120 but WITHOUT ANY WARRANTY; without even the implied warranty of
121 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
122 GNU General Public License for more details.
124 You should have received a copy of the GNU General Public License
125 along with this program. If not, see <http://www.gnu.org/licenses/>.
128 Portions of h264encode.h and h264encode.cpp:
130 Copyright (c) 2007-2013 Intel Corporation. All Rights Reserved.
132 Permission is hereby granted, free of charge, to any person obtaining a
133 copy of this software and associated documentation files (the
134 "Software"), to deal in the Software without restriction, including
135 without limitation the rights to use, copy, modify, merge, publish,
136 distribute, sub license, and/or sell copies of the Software, and to
137 permit persons to whom the Software is furnished to do so, subject to
138 the following conditions:
140 The above copyright notice and this permission notice (including the
141 next paragraph) shall be included in all copies or substantial portions
144 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
145 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
146 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
147 IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
148 ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
149 TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
150 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.