Nageru is a live video mixer, based around the standard M/E workflow.
-Features (those marked with * are still in progress or not started yet):
+Features:
- High performance on modest hardware (720p60 with two input streams
on my Thinkpad X240[1]); almost all pixel processing is done on the GPU.
for intermediate calculations, dithered output.
- Proper sound support: Syncing of multiple unrelated sources through
- high-quality resampling, mixing (*), cue out for headphones,
- dynamic range compression, fixed EQ, level meters conforming to EBU R128.
+ high-quality resampling, freely selectable input, cue out for headphones,
+ dynamic range compression, simple EQ (lowpass), level meters conforming
+ to EBU R128.
- Theme engine encapsulating the design demands of each individual
event; Lua code is responsible for setting up the pixel processing
(so 12.8 GB/sec theoretical memory bandwidth, shared between CPU and GPU).
-Nageru is in alpha stage. It currently needs:
+Nageru is in beta stage. It currently needs:
- An Intel processor with Intel Quick Sync, or otherwise some hardware
H.264 encoder exposed through VA-API.
- - Two Blackmagic USB3 cards, either HDMI or SDI. Note that on some machines,
- you may have to run a Linux kernel with power saving compiled out to avoid
- LPM (link power management) and bandwidth allocation issues with USB3.
- These are driven through the “bmusb“ driver embedded in bmusb/, using
- libusb-1.0.
+ - Two or more Blackmagic USB3 cards, either HDMI or SDI. These are driven
+ through the “bmusb” driver embedded in bmusb/, using libusb-1.0.
+ Note that you will want a recent Linux kernel to avoid LPM (link power
+ management) and bandwidth allocation issues with USB3.
- - Movit, my GPU-based video filter library (http://movit.sesse.net).
- Newer is almost certainly better; Nageru's needs tends to drive new
- features in Movit.
+ - Movit, my GPU-based video filter library (https://movit.sesse.net).
+ You will need at least version 1.3.0.
- Qt 5.5 or newer for the GUI.
- Lua, for driving the theme engine.
+If on Debian sid or something similar (or stretch, once Movit 1.3.0 migrates),
+you can install everything you need with:
+
+ git submodule update --init
+ apt install qtbase5-dev qt5-default pkg-config libmicrohttpd-dev \
+ libusb-1.0-0-dev liblua5.2-dev libzita-resampler-dev libva-dev \
+ libavcodec-dev libavformat-dev libswscale-dev libmovit-dev \
+ libegl1-mesa-dev libasound2-dev
+
+
The patches/ directory contains some patches for upstream software that help
Nageru performance and/or stability. They are all meant for upstream, but
probably will not be in by the time Nageru is released. All except the bmusb
email, unlike Nageru itself and bmusb), and under the same license as the
projects they patch.
-To start it, just hook up your requipment, type “make” and then “./nageru”.
+To start it, just hook up your equipment, type “make” and then “./nageru”.
It is strongly recommended to have the rights to run at real-time priority;
it will make the USB3 threads do so, which will make them a lot more stable.
(A reasonable hack for testing is probably just to run it as root using sudo,
give up, but that's not the intended meaning.)
+Nageru's home page is at https://nageru.sesse.net/, where you can also find
+contact information and link to the latest version.
+
+
Legalese: TL;DR: Everything is GPLv3-or-newer compatible, and see
Intel's copyright license at h264encode.h.