1 Nageru and Futatabi 2.1.0, February 6th, 2022
3 - Support unsynchronized HDMI/SDI output.
5 This is for if you want just a monitor output without synchronizing
6 your entire stream chain to the output card (ie., you want to keep
7 some other camera as the master). Sound support is untested, and is
8 probably going to crackle a fair bit.
10 There's no GUI support for changing this currently (you enable it
11 by using --output-card-unsynchronized and then using HDMI/SDI output
14 - Support sending a separate x264 encode to disk
15 (--separate-x264-disk-encode and associated --x264-separate-disk-*
18 This is useful for machines that don't have Quick Sync, but where
19 you want to have an archival copy on disk in higher quality
20 than what you streamed out.
22 - Fix compilation issues with FFmpeg 5.0.
25 Nageru and Futatabi 2.0.2, September 3rd, 2021
27 - Fix issues with various upstream software:
28 DeckLink 11.7 (and newer) drivers, FFmpeg 4.4, newer CEF.
30 - Add a --no-transcode-video flag to Kaeru.
32 This is useful primarily if you want Kaeru to rewrap the stream into
33 Metacube (for Cubemap) and do nothing else with it. Only H.264
34 is supported for now, since everything else assumes that.
37 Nageru and Futatabi 2.0.1, July 9th, 2020
39 - Upgrade DeckLink SDK to 10.11.4.
44 Nageru and Futatabi 2.0.0, June 2nd, 2020
46 - Native support for SRT inputs; by default, Nageru will listen
47 for incoming connections on port 9710 and treat them as hotplugged
48 cameras. They do not need any special handling in the theme,
49 and can pick up e.g. the SRT stream ID to be used in the UI.
50 They generally have fewer limitations than using an srt:// URL
51 on an FFmpeg capture; e.g., there is no forced scaling, and they
52 can be used as master clock (although this is not generally
55 For license reaseons, please be sure that libsrt does not link to
56 OpenSSL when building Nageru.
58 - You do no longer need to set up a fixed amount of capture cards
59 at startup; by default, at least two will be created for you
60 (fake capture cards) as before, but if you have more, or hotplug
61 more, more slots will be automatically available, and will go
62 away (not take up any resources like fake capture cards do)
63 when unplugged. If you wish to artificially limit the maximum
64 number of cards like before, you can use the new switch
67 - MJPEG handling now includes 4:2:0 support in both Nageru and
68 Futatabi, as SRT inputs are often 4:2:0 and not 4:2:2.
70 - FFmpeg capture cards (including SRT cards) now use VA-API
71 hardware acceleration for decoding whenever available.
74 Nageru and Futatabi 1.9.3, April 12th, 2020
76 - Support (video-only) V4L2 output. The intended use case is output into
77 v4l2loopback to get into videoconferencing or the likes:
79 sudo apt install v4l2loopback-dkms
80 sudo modprobe v4l2loopback video_nr=2 card_label='Nageru loopback' max_width=1280 max_height=720 exclusive_caps=1
81 nageru --v4l-output /dev/video2
83 Start Nageru before any readers.
86 Nageru and Futatabi 1.9.2, March 29th, 2020
88 - Support handling white balance directly in Nageru, without themes
89 manually inserting a WhiteBalanceEffect or handling set_wb().
90 To use it, call scene:add_white_balance() instead of
91 scene:add_effect(WhiteBalanceEffect.new()). If using this functionality,
92 white balance will be properly propagated to the MJPEG feed and
93 through Futatabi, so that replays get the correct white balance.
94 Futatabi's UI will still be uncorrected, though.
96 - Make it possible to siphon out a single MJPEG stream, for remote
97 debugging, single-camera recording, single-camera streaming via
98 Kaeru or probably other things. The URL for this is /feeds/N.mp4
99 where N is the card index (starting from zero).
101 - The theme can now access some audio settings; it can get (not set)
102 number of buses and names, get/set fader volume, get/set mute,
103 and get/set EQ parameters.
105 - In Futatabi, it is now possible to set custom source labels, with
106 the parameter --source-label NUM:LABEL (or -l NUM:LABEL).
108 - When the playback speed changes in Futatabi, ease into the new speed.
109 The easing period is nominally 200 ms, but it will be automatically
110 shortened or lengthened (up to as much as two seconds in extreme
111 cases, especially involving very slight speed change) if this
112 helps getting back into a cadence of hitting the original frames.
113 This can mean significant performance improvements when ramping
114 from higher speeds back into 100%.
116 - Updates for newer versions of CEF (tested with Chrome 80).
118 - Various bugfixes and performance improvements.
121 Nageru and Futatabi 1.9.1, November 17th, 2019
123 - Support disabling optional effects if a given other effect is _enabled_
124 (typically for mutually exclusive effects).
126 - Make it possible for the theme to override the status line, by declaring
127 a function format_status_line() in the theme. Inspired by a C++ patch by
128 Alex Thomazo in the Breizhcamp repository.
133 Nageru and Futatabi 1.9.0, July 20th, 2019
135 - Significant reworking of the theme engine: Chains (now called scenes)
136 can now instantiate different versions behind-the-scenes instead of the
137 user having to worry about input types, low/high quality, or replacing
138 effects with others. Menus can have submenus and checkboxes. Finally, some
139 callbacks, such as num_channels(), have been replaced with easier-to-use
140 imperative functions, ie., an explicit call to Nageru.set_num_channels(N).
142 See the documentation for more information, or the included themes,
143 which have been ported to the new interfaces. Existing themes will continue
144 to run without modification, but the old interfaces are deprecated.
146 Martin Sandsmark contributed a bugfix to this work.
148 - Support cross-compilation. Patch from Helmut Grohne.
150 - Kaeru now has a parameter --disable-audio for transcoding streams
153 - Various bugfixes. In particular, work around an issue where Mesa's shader
154 cache interacts with Qt's EGL support to create a confusing crash with
155 “vertex shader lacks `main'”.
158 Nageru and Futatabi 1.8.6, April 19th, 2019
160 - Filenames for the recordings are now without colons; it caused
161 too much problems with various software, including most players.
166 Nageru and Futatabi 1.8.5, March 30th, 2019
168 - Experimental support for audio in Futatabi: The MJPEG export from
169 Nageru now supports audio, and Futatabi will store it and play it
170 back. Audio is currently only supported when playing at 100% speed
171 (no pitch shift or time stretching), and there is no audio output
172 to the Futatabi operator.
174 - Significant optimizations to MJPEG encoding, both when in use and when
180 Nageru and Futatabi 1.8.4, March 11th, 2019
182 - Various bugfixes, in particular for 32-bit platforms.
185 Nageru and Futatabi 1.8.3, March 10th, 2019
187 - Allow controlling video mixing from MIDI events. Adapted from a patch
188 by Yann Dubreuil, from the BreizhCamp repository.
190 - Use ALSA hardware timestamps for input; gives more stable delay.
191 Patch by Yann Dubreuil, from the BreizhCamp repository.
193 - For FFmpeg inputs, add an option for playing as fast as possible
196 - In Futatabi, support queueing and playing clips with no cue-out point.
197 This opens up for new and even faster UI workflows.
202 Nageru and Futatabi 1.8.2, January 19th, 2019
204 - Futatabi now supports MIDI controllers like Nageru, including an editor
205 and a sample mapping for the Behringer CMD PL-1.
207 - Futatabi now supports changing master speed during play, both via a
208 MIDI controller and the GUI.
213 Nageru and Futatabi 1.8.1, December 30th, 2018
215 - Futatabi can now communicate its queue status through a subtitle track,
216 and Nageru can consume it. This allows Nageru themes to get precise
217 information programmatically, e.g. to show status or automatically
218 switch away when the queue is about to end.
220 - Futatabi can now reuse the computed flow across successive frames when
221 interpolating between the same frame pair. This significantly reduces
222 the GPU load when doing super-slow motion (slower than 0.5x).
224 - Various smaller fixes.
227 Nageru and Futatabi 1.8.0, December 20th, 2018
229 - Initial release of Futatabi, a multicamera slow motion video server
230 designed to be used with Nageru. Futatabi is currently in alpha stage
231 and largely undocumented.
233 - Add support for multi-camera export from Nageru. A multi-camera stream
234 contains all frames from all camera inputs (unless overridden by
235 --mjpeg-export-cards), unprocessed except for MJPEG encoding.
236 MJPEG encoding is done in hardware (via VA-API) on Skylake or newer,
237 or using libjpeg otherwise. The intended user of this stream is Futatabi.
240 Nageru 1.7.5, November 11th, 2018
242 - Fix a bug where --record-x264-video would not work when VA-API was
243 not present, making the option rather useless (broken in 1.7.2).
244 Bug reported by Peter De Schrijver.
246 - The build system has been switched to Meson; see the README for new
249 - Various smaller fixes.
252 Nageru 1.7.4, August 31st, 2018
254 - Rework the x264 speedcontrol presets, again. (They earlier assumed
255 we could control B-frame settings on the fly, which we cannot with
256 threaded lookahead.) Also support x264 >= 153, which can support
257 multiple bit depths in the same library.
259 - Default to SDI inputs instead of HDMI.
261 - Add a mode to run in full screen (--fullscreen). Adapted from a patch
264 - Add support for lift/gamma/gain in the theme. Patch by Alexandre Thomazo.
267 Nageru 1.7.3, May 22nd, 2018
269 - When using multichannel audio, add a control for adjusting the
270 stereo width (from normal stereo to mono, all the way to
273 - Removed --http-coarse-timebase (it is now always on).
278 Nageru 1.7.2, April 28th, 2018
280 - Several improvements to video (FFmpeg) inputs: You can now use
281 them as audio sources, you can right-click on video channels
282 to change URL/filename on-the-fly, themes can ask for forced
283 disconnection (useful for network sources that are hanging),
284 and various other improvements. Be aware that the audio support
285 may still be somewhat rough, as A/V sync of arbitrary video
286 playout is a hard problem.
288 - The included themes have been fixed to properly make the returned
289 chain preparation functions independent of global state (e.g. if
290 the white balance for a channel was changed before the frame was
291 actually rendered). If you are using a custom theme, you may want
292 to apply similar fixes to it.
294 - In Metacube stream output, mark each keyframe with a pts metadata
295 block. This allows Cubemap 1.4.0 or newer to serve fMP4 fragments
296 for HLS from Nageru's output, without any further remuxing or
299 - If needed, Nageru will now automatically try to autodetect a
300 usable --va-display parameter by probing all DRM nodes for H.264
301 encoders. This removes the need to set --va-display in almost all
302 cases, and also removes the dependency on libpci.
304 - For GPUs that support querying available memory (in practice only
305 NVIDIA GPUs at the current time), expose the amount of used/total
306 GPU memory both on standard output and in the Prometheus metrics
307 (as well as included Grafana dashboard).
309 - The Grafana dashboard now supports heatmaps for the chosen x264
310 speedcontrol preset (requires Grafana 5.1 or newer). (There used to
311 be a heatmap earlier, but it was all broken.)
316 Nageru 1.7.1, March 26th, 2018
318 - Various bugfixes, mostly related to HTML and video inputs.
321 Nageru 1.7.0, March 8th, 2018
323 - Support for HTML5 graphics directly in Nageru, through CEF
324 (Chromium Embedded Framework). This performs better and is more
325 flexible than integrating with CasparCG over a socket. Note that
326 CEF is an optional component; see the documentation for more
329 - Add an HTTP endpoint for enumerating channels and one for getting
330 only their colors. Intended for remote tally applications;
331 set the documentation.
333 - Add a video grid display that removes the audio controls and shows
334 the video channels only, potentially in multiple rows if that makes
335 for a larger viewing area.
337 - Themes can now present simple menus in the Nageru UI. See the
338 documentation for more information.
343 Nageru 1.6.4, January 25th, 2018
345 - Fix compilation with the upcoming FFmpeg 3.5.
347 - Switch to LuaJIT for the theme engine, which is faster.
349 - Various bugfixes and smaller optimizations.
352 Nageru 1.6.3, November 8th, 2017
354 - Add quick-cut keys (Q, W, E, etc.) below the preview keys.
355 Since it's easy to hit these by accident and put up a signal
356 you didn't want, they are disabled by default (they can be
357 enabled in the video menu, or with the command line flag
360 - Rework the x264 speedcontrol presets to better match newer
363 - Add an option for changing the HTTP port (--http-port).
365 - Various smaller bug and integration fixes.
368 Nageru 1.6.2, July 16th, 2017
370 - Various smaller Kaeru fixes, mostly around metrics. Also,
371 you can now adjust the x264 bitrate in Kaeru (in 100 kbit/sec
372 increments) by sending SIGUSR1 (higher) or SIGUSR2 (lower).
375 Nageru 1.6.1, July 9th, 2017
377 - Add native export of Prometheus metrics.
379 - Rework the frame queue drop algorithm. The new one should handle tricky
380 situations much better, especially when a card is drifting very slowly
381 against the master timer.
383 - Add Kaeru, an experimental transcoding tool based on Nageru code.
384 Kaeru can run headless on a server without a GPU to transcode a
385 Nageru stream into a lower-bitrate one, replacing VLC.
387 - Work around a bug in some versions of NVIDIA's OpenGL drivers that would
388 crash Nageru after about three hours (fix in cooperation with Movit).
390 - Fix a crash with i965-va-driver 1.8.x.
392 - Reduce mutex contention in certain critical places, causing lower tail
393 latency in the mixer.
396 Nageru 1.6.0, May 29th, 2017
398 - Add support for having videos (from file or from URL) as a separate
399 input channels, albeit with some limitations. Apart from the obvious use of
400 looping pause clips or similar, this can be used to integrate with CasparCG;
401 see the manual for more details.
403 - Add a frame analyzer (accessible from the Video menu) containing an
404 RGB histogram and a color dropped tool. This is useful in calibrating
405 video chains by playing back a known signal. Note that this adds a
406 dependency on QCustomPlot.
408 - Allow overriding Y'CbCr input interpretation, for inputs that don't
409 use the correct settings. Also, Rec. 601 is now used by default instead
410 of Rec. 709 for SD resolutions.
412 - Support other sample rates than 48000 Hz from bmusb.
415 Nageru 1.5.0, April 5th, 2017
417 - Support for low-latency HDMI/SDI output in addition to (or instead of) the
418 stream. This currently only works with DeckLink cards, not bmusb. See the
419 manual for more information.
421 - Support changing the resolution from the command line, instead of locking
422 everything to 1280x720.
424 - The A/V sync code has been rewritten to be more in line with Fons
425 Adriaensen's original paper. It handles several cases much better,
426 in particular when trying to match 59.94 and 60 Hz sources to each other.
427 However, it might occasionally need a few extra seconds on startup to
428 lock properly if startup is slow.
430 - Add support for using x264 for the disk recording. This makes it possible,
431 among other things, to run Nageru on a machine entirely without VA-API
434 - Support for 10-bit Y'CbCr, both on input and output. (Output requires
435 x264 disk recording, as Quick Sync Video does not support 10-bit H.264.)
436 This requires compute shader support, and is in general a little bit
437 slower on input and output, due to the extra amount of data being shuffled
438 around. Intermediate precision is 16-bit floating-point or better,
441 - Enable input mode autodetection for DeckLink cards that support it.
442 (bmusb mode has always been autodetected.)
444 - Add functionality to add a time code to the stream; useful for debugging
447 - The live display is now both more performant and of higher image quality.
449 - Fix a long-standing issue where the preview displays would be too bright
450 when using an NVIDIA GPU. (This did not affect the finished stream.)
452 - Many other bugfixes and small improvements.
455 Nageru 1.4.2, November 24th, 2016
457 - Fix a thread race that would sometimes cause x264 streaming to go awry.
460 Nageru 1.4.1, November 6th, 2016
465 Nageru 1.4.0, October 26th, 2016
467 - Support for multichannel (or more accurately, multi-bus) audio,
468 choosable from the UI or using the --multichannel command-line
469 flag. In multichannel mode, you can take in inputs from multiple
470 different sources (or different channels on the same source, for
471 multichannel sound cards), apply effects to them separately and then
472 mix them together. This includes both audio from the video cards
473 as well as ALSA inputs, including hotplug. Ola Gundelsby contributed
474 invaluable feedback on this feature throughout the entire
477 - Support for having MIDI controllers control various aspects of the
478 audio UI, with relatively flexible mapping. Note that different
479 MIDI controllers can vary significantly in what protocol they speak,
480 so Nageru will not necessarily work with all. (The primary testing
481 controller has been the Akai MIDImix, and a pre-made mapping for
482 that is included. The Korg nanoKONTROL2 has also been tested and
483 works, but it requires some Korg-specific SysEx commands to make
484 the buttons and lights work.)
486 - Add a disk space indicator to the main window.
488 - Various bugfixes. In particular, an issue where the audio would pitch
489 up sharply after a series of many dropped frames has been fixed.
492 Nageru 1.3.4, August 2nd, 2016
497 Nageru 1.3.3, July 27th, 2016
499 - Various changes to make distribution packaging easier; in particular,
500 theme data can be picked up from /usr/local/share/nageru.
502 - Fix various FFmpeg deprecation warnings, now that we need FFmpeg
503 3.1 for other reasons anyway.
506 Nageru 1.3.2, July 23rd, 2016
508 - Allow limited hotplugging (unplugging and replugging) of USB cards.
509 You can use the new command-line option --num-fake-cards (-C) to add
510 fake cards that show only a single color and that will be replaced
511 by real cards as you plug them in; you can also unplug cards and have
512 them be replaced by fake cards. Fake cards can also be used for testing
513 Nageru without actually having any video cards available.
515 - Add Metacube timestamping of every keyframe, for easier detection of
516 streams not keeping up. Works with the new timestamp feature of
517 Cubemap 1.3.1. Will be ignored (save for some logging) in older
520 - The included default theme has been reworked and cleaned up to be
521 more understandable and extensible.
523 - Add more command-line options for initial audio setup.
526 Nageru 1.3.1, July 1st, 2016
528 - Various display bugfixes.
531 Nageru 1.3.0, June 26th, 2016
533 - It is now possible, given enough CPU power (e.g., a quad-core Haswell or
534 faster desktop CPU), to output a stream that is suitable for streaming
535 directly to end users without further transcoding. In particular, this
536 includes support for encoding the network stream with x264 (the stream
537 saved to disk is still done using Quick Sync), for Metacube framing (for
538 streaming to the Cubemap reflector), and for choosing the network stream
539 mux. For more information, see the README.
541 - Add a flag (--disable-alsa-output) to disable ALSA monitoring output.
543 - Do texture uploads from the main thread instead of from separate threads;
544 may or may not improve stability with NVIDIA's proprietary drivers.
546 - When beginning a new video segment, the shutdown of the old encoder
547 is now done in a background thread, in order to not disturb the external
548 stream. The audio still goes into a somewhat random stream, though.
550 - You can now override the default stream-to-card mapping with --map-signal=
553 - Nageru now tries to lock itself into RAM if it has the permissions to do
554 so, for better realtime behavior. (Writing the stream to disk tends to
555 fill the buffer cache, eventually paging less-used parts of Nageru out.)
557 - Various fixes for deadlocks, memory leaks, and many other errors.
560 Nageru 1.2.1, April 15th, 2016
562 - Images are now updated from disk about every second, so that it is possible
563 to update e.g. overlays during streaming, although somewhat slowly.
565 - Fix support for PNG images.
567 - You can now send SIGHUP to start a new cut instead of using the menu.
569 - Added a --help option.
571 - Various tweaks to OpenGL fence handling.
574 Nageru 1.2.0, April 6th, 2016
576 - Support for Blackmagic's PCI and Thunderbolt cards, using the official
577 (closed-source) Blackmagic drivers. (You do not need the SDK installed, though.)
578 You can use PCI and USB cards pretty much interchangeably.
580 - Much more stable handling of frame queues on non-master cards. In particular,
581 you can have a master card on 50 Hz and another card on 60 Hz without getting
582 lots of warning messages and a 10+ frame latency on the second card.
584 - Many new options in the right click menu on cards: Adjustable video inputs,
585 adjustable audio inputs, adjustable resolutions, ability to select card for
588 - Add support for starting with almost all audio processing turned off
591 - The UI now marks inputs with red or green to mark them as participating in
592 the live or preview signal, respectively. Red takes priority. (Actually,
593 it merely asks the theme for a color for each input; the theme contains
596 - Add support for uncompressed video instead of H.264 on the HTTP server,
597 while still storing H.264 to files (--http-uncompressed-video). Note that
598 depending on your client, this might not actually be more CPU efficient
599 even on localhost, so be sure to check.
601 - Add a simpler, less featureful theme (simple.lua) that should be easier to
602 understand for beginners. Themes are now also choosable with -t on the command
605 - Too many bugfixes and small tweaks to list. In particular, many memory leaks
606 in the streaming part have been identified and fixed.
609 Nageru 1.1.0, February 24th, 2016
611 - Support doing the H.264 encoding on a different graphics device from the one
612 doing the mixing. In particular, this makes it possible to use Nageru on an
613 NVIDIA GPU while still encoding H.264 video using Intel Quick Sync (NVENC
614 is not supported yet) -- it is less efficient since the data needs to be read
615 back via the CPU, but the NVIDIA cards and drivers are so much faster that it
616 doesn't really matter. Tested on a GTX 950 with the proprietary drivers.
618 - In the included example theme, fix fading to/from deinterlaced sources.
620 - Various smaller compilation, distribution and documentation fixes.
623 Nageru 1.0.0, January 30th, 2016