1 Nageru and Futatabi 2.2.1, April 17th, 2023
3 - Work around an issue with OpenGL on Wayland, causing all
6 - Several fixes related to video inputs; in particular:
7 - Fix crashes when the master clock goes faster than 60 Hz
8 (which could happen primarily if an SRT input is the master).
9 - Be more resilient to errors in hardware video decoding
10 when the stream starts out broken (e.g., not on a key frame)
12 - Multiple fixes related to hardware acceleration on nVidia.
13 - Incoming frames of too high resolution (larger than 8 MB)
14 will be refused instead of crashing. Such videos may be
15 supported better in the future.
18 Nageru and Futatabi 2.2.0, November 15th, 2022
20 - Support AV1 output, via SVT-AV1. Note that this is still somewhat
21 experimental, not the least because SVT-AV1's streaming support
22 is not as mature as x264.
24 - Remove the dependency on QCustomPlot.
26 - Expose BlurEffect and UnsharpMaskEffect to the theme.
28 - Clean up several rarely-unused command-line flags:
29 - All the 10-bit flags are now collapsed to --10-bit.
30 - Remove --http-uncompressed-video.
31 - Remove the x264 VBV flags.
32 - Hide --x264-speedcontrol-verbose.
33 - Hide --no-flush-pbos.
35 - Make a workaround for audio monitoring output under PipeWire.
37 - Update CEF compatibility (tested with CEF 107).
40 Nageru and Futatabi 2.1.0, February 6th, 2022
42 - Support unsynchronized HDMI/SDI output.
44 This is for if you want just a monitor output without synchronizing
45 your entire stream chain to the output card (ie., you want to keep
46 some other camera as the master). Sound support is untested, and is
47 probably going to crackle a fair bit.
49 There's no GUI support for changing this currently (you enable it
50 by using --output-card-unsynchronized and then using HDMI/SDI output
53 - Support sending a separate x264 encode to disk
54 (--separate-x264-disk-encode and associated --x264-separate-disk-*
57 This is useful for machines that don't have Quick Sync, but where
58 you want to have an archival copy on disk in higher quality
59 than what you streamed out.
61 - Fix compilation issues with FFmpeg 5.0.
64 Nageru and Futatabi 2.0.2, September 3rd, 2021
66 - Fix issues with various upstream software:
67 DeckLink 11.7 (and newer) drivers, FFmpeg 4.4, newer CEF.
69 - Add a --no-transcode-video flag to Kaeru.
71 This is useful primarily if you want Kaeru to rewrap the stream into
72 Metacube (for Cubemap) and do nothing else with it. Only H.264
73 is supported for now, since everything else assumes that.
76 Nageru and Futatabi 2.0.1, July 9th, 2020
78 - Upgrade DeckLink SDK to 10.11.4.
83 Nageru and Futatabi 2.0.0, June 2nd, 2020
85 - Native support for SRT inputs; by default, Nageru will listen
86 for incoming connections on port 9710 and treat them as hotplugged
87 cameras. They do not need any special handling in the theme,
88 and can pick up e.g. the SRT stream ID to be used in the UI.
89 They generally have fewer limitations than using an srt:// URL
90 on an FFmpeg capture; e.g., there is no forced scaling, and they
91 can be used as master clock (although this is not generally
94 For license reaseons, please be sure that libsrt does not link to
95 OpenSSL when building Nageru.
97 - You do no longer need to set up a fixed amount of capture cards
98 at startup; by default, at least two will be created for you
99 (fake capture cards) as before, but if you have more, or hotplug
100 more, more slots will be automatically available, and will go
101 away (not take up any resources like fake capture cards do)
102 when unplugged. If you wish to artificially limit the maximum
103 number of cards like before, you can use the new switch
106 - MJPEG handling now includes 4:2:0 support in both Nageru and
107 Futatabi, as SRT inputs are often 4:2:0 and not 4:2:2.
109 - FFmpeg capture cards (including SRT cards) now use VA-API
110 hardware acceleration for decoding whenever available.
113 Nageru and Futatabi 1.9.3, April 12th, 2020
115 - Support (video-only) V4L2 output. The intended use case is output into
116 v4l2loopback to get into videoconferencing or the likes:
118 sudo apt install v4l2loopback-dkms
119 sudo modprobe v4l2loopback video_nr=2 card_label='Nageru loopback' max_width=1280 max_height=720 exclusive_caps=1
120 nageru --v4l-output /dev/video2
122 Start Nageru before any readers.
125 Nageru and Futatabi 1.9.2, March 29th, 2020
127 - Support handling white balance directly in Nageru, without themes
128 manually inserting a WhiteBalanceEffect or handling set_wb().
129 To use it, call scene:add_white_balance() instead of
130 scene:add_effect(WhiteBalanceEffect.new()). If using this functionality,
131 white balance will be properly propagated to the MJPEG feed and
132 through Futatabi, so that replays get the correct white balance.
133 Futatabi's UI will still be uncorrected, though.
135 - Make it possible to siphon out a single MJPEG stream, for remote
136 debugging, single-camera recording, single-camera streaming via
137 Kaeru or probably other things. The URL for this is /feeds/N.mp4
138 where N is the card index (starting from zero).
140 - The theme can now access some audio settings; it can get (not set)
141 number of buses and names, get/set fader volume, get/set mute,
142 and get/set EQ parameters.
144 - In Futatabi, it is now possible to set custom source labels, with
145 the parameter --source-label NUM:LABEL (or -l NUM:LABEL).
147 - When the playback speed changes in Futatabi, ease into the new speed.
148 The easing period is nominally 200 ms, but it will be automatically
149 shortened or lengthened (up to as much as two seconds in extreme
150 cases, especially involving very slight speed change) if this
151 helps getting back into a cadence of hitting the original frames.
152 This can mean significant performance improvements when ramping
153 from higher speeds back into 100%.
155 - Updates for newer versions of CEF (tested with Chrome 80).
157 - Various bugfixes and performance improvements.
160 Nageru and Futatabi 1.9.1, November 17th, 2019
162 - Support disabling optional effects if a given other effect is _enabled_
163 (typically for mutually exclusive effects).
165 - Make it possible for the theme to override the status line, by declaring
166 a function format_status_line() in the theme. Inspired by a C++ patch by
167 Alex Thomazo in the Breizhcamp repository.
172 Nageru and Futatabi 1.9.0, July 20th, 2019
174 - Significant reworking of the theme engine: Chains (now called scenes)
175 can now instantiate different versions behind-the-scenes instead of the
176 user having to worry about input types, low/high quality, or replacing
177 effects with others. Menus can have submenus and checkboxes. Finally, some
178 callbacks, such as num_channels(), have been replaced with easier-to-use
179 imperative functions, ie., an explicit call to Nageru.set_num_channels(N).
181 See the documentation for more information, or the included themes,
182 which have been ported to the new interfaces. Existing themes will continue
183 to run without modification, but the old interfaces are deprecated.
185 Martin Sandsmark contributed a bugfix to this work.
187 - Support cross-compilation. Patch from Helmut Grohne.
189 - Kaeru now has a parameter --disable-audio for transcoding streams
192 - Various bugfixes. In particular, work around an issue where Mesa's shader
193 cache interacts with Qt's EGL support to create a confusing crash with
194 “vertex shader lacks `main'”.
197 Nageru and Futatabi 1.8.6, April 19th, 2019
199 - Filenames for the recordings are now without colons; it caused
200 too much problems with various software, including most players.
205 Nageru and Futatabi 1.8.5, March 30th, 2019
207 - Experimental support for audio in Futatabi: The MJPEG export from
208 Nageru now supports audio, and Futatabi will store it and play it
209 back. Audio is currently only supported when playing at 100% speed
210 (no pitch shift or time stretching), and there is no audio output
211 to the Futatabi operator.
213 - Significant optimizations to MJPEG encoding, both when in use and when
219 Nageru and Futatabi 1.8.4, March 11th, 2019
221 - Various bugfixes, in particular for 32-bit platforms.
224 Nageru and Futatabi 1.8.3, March 10th, 2019
226 - Allow controlling video mixing from MIDI events. Adapted from a patch
227 by Yann Dubreuil, from the BreizhCamp repository.
229 - Use ALSA hardware timestamps for input; gives more stable delay.
230 Patch by Yann Dubreuil, from the BreizhCamp repository.
232 - For FFmpeg inputs, add an option for playing as fast as possible
235 - In Futatabi, support queueing and playing clips with no cue-out point.
236 This opens up for new and even faster UI workflows.
241 Nageru and Futatabi 1.8.2, January 19th, 2019
243 - Futatabi now supports MIDI controllers like Nageru, including an editor
244 and a sample mapping for the Behringer CMD PL-1.
246 - Futatabi now supports changing master speed during play, both via a
247 MIDI controller and the GUI.
252 Nageru and Futatabi 1.8.1, December 30th, 2018
254 - Futatabi can now communicate its queue status through a subtitle track,
255 and Nageru can consume it. This allows Nageru themes to get precise
256 information programmatically, e.g. to show status or automatically
257 switch away when the queue is about to end.
259 - Futatabi can now reuse the computed flow across successive frames when
260 interpolating between the same frame pair. This significantly reduces
261 the GPU load when doing super-slow motion (slower than 0.5x).
263 - Various smaller fixes.
266 Nageru and Futatabi 1.8.0, December 20th, 2018
268 - Initial release of Futatabi, a multicamera slow motion video server
269 designed to be used with Nageru. Futatabi is currently in alpha stage
270 and largely undocumented.
272 - Add support for multi-camera export from Nageru. A multi-camera stream
273 contains all frames from all camera inputs (unless overridden by
274 --mjpeg-export-cards), unprocessed except for MJPEG encoding.
275 MJPEG encoding is done in hardware (via VA-API) on Skylake or newer,
276 or using libjpeg otherwise. The intended user of this stream is Futatabi.
279 Nageru 1.7.5, November 11th, 2018
281 - Fix a bug where --record-x264-video would not work when VA-API was
282 not present, making the option rather useless (broken in 1.7.2).
283 Bug reported by Peter De Schrijver.
285 - The build system has been switched to Meson; see the README for new
288 - Various smaller fixes.
291 Nageru 1.7.4, August 31st, 2018
293 - Rework the x264 speedcontrol presets, again. (They earlier assumed
294 we could control B-frame settings on the fly, which we cannot with
295 threaded lookahead.) Also support x264 >= 153, which can support
296 multiple bit depths in the same library.
298 - Default to SDI inputs instead of HDMI.
300 - Add a mode to run in full screen (--fullscreen). Adapted from a patch
303 - Add support for lift/gamma/gain in the theme. Patch by Alexandre Thomazo.
306 Nageru 1.7.3, May 22nd, 2018
308 - When using multichannel audio, add a control for adjusting the
309 stereo width (from normal stereo to mono, all the way to
312 - Removed --http-coarse-timebase (it is now always on).
317 Nageru 1.7.2, April 28th, 2018
319 - Several improvements to video (FFmpeg) inputs: You can now use
320 them as audio sources, you can right-click on video channels
321 to change URL/filename on-the-fly, themes can ask for forced
322 disconnection (useful for network sources that are hanging),
323 and various other improvements. Be aware that the audio support
324 may still be somewhat rough, as A/V sync of arbitrary video
325 playout is a hard problem.
327 - The included themes have been fixed to properly make the returned
328 chain preparation functions independent of global state (e.g. if
329 the white balance for a channel was changed before the frame was
330 actually rendered). If you are using a custom theme, you may want
331 to apply similar fixes to it.
333 - In Metacube stream output, mark each keyframe with a pts metadata
334 block. This allows Cubemap 1.4.0 or newer to serve fMP4 fragments
335 for HLS from Nageru's output, without any further remuxing or
338 - If needed, Nageru will now automatically try to autodetect a
339 usable --va-display parameter by probing all DRM nodes for H.264
340 encoders. This removes the need to set --va-display in almost all
341 cases, and also removes the dependency on libpci.
343 - For GPUs that support querying available memory (in practice only
344 NVIDIA GPUs at the current time), expose the amount of used/total
345 GPU memory both on standard output and in the Prometheus metrics
346 (as well as included Grafana dashboard).
348 - The Grafana dashboard now supports heatmaps for the chosen x264
349 speedcontrol preset (requires Grafana 5.1 or newer). (There used to
350 be a heatmap earlier, but it was all broken.)
355 Nageru 1.7.1, March 26th, 2018
357 - Various bugfixes, mostly related to HTML and video inputs.
360 Nageru 1.7.0, March 8th, 2018
362 - Support for HTML5 graphics directly in Nageru, through CEF
363 (Chromium Embedded Framework). This performs better and is more
364 flexible than integrating with CasparCG over a socket. Note that
365 CEF is an optional component; see the documentation for more
368 - Add an HTTP endpoint for enumerating channels and one for getting
369 only their colors. Intended for remote tally applications;
370 set the documentation.
372 - Add a video grid display that removes the audio controls and shows
373 the video channels only, potentially in multiple rows if that makes
374 for a larger viewing area.
376 - Themes can now present simple menus in the Nageru UI. See the
377 documentation for more information.
382 Nageru 1.6.4, January 25th, 2018
384 - Fix compilation with the upcoming FFmpeg 3.5.
386 - Switch to LuaJIT for the theme engine, which is faster.
388 - Various bugfixes and smaller optimizations.
391 Nageru 1.6.3, November 8th, 2017
393 - Add quick-cut keys (Q, W, E, etc.) below the preview keys.
394 Since it's easy to hit these by accident and put up a signal
395 you didn't want, they are disabled by default (they can be
396 enabled in the video menu, or with the command line flag
399 - Rework the x264 speedcontrol presets to better match newer
402 - Add an option for changing the HTTP port (--http-port).
404 - Various smaller bug and integration fixes.
407 Nageru 1.6.2, July 16th, 2017
409 - Various smaller Kaeru fixes, mostly around metrics. Also,
410 you can now adjust the x264 bitrate in Kaeru (in 100 kbit/sec
411 increments) by sending SIGUSR1 (higher) or SIGUSR2 (lower).
414 Nageru 1.6.1, July 9th, 2017
416 - Add native export of Prometheus metrics.
418 - Rework the frame queue drop algorithm. The new one should handle tricky
419 situations much better, especially when a card is drifting very slowly
420 against the master timer.
422 - Add Kaeru, an experimental transcoding tool based on Nageru code.
423 Kaeru can run headless on a server without a GPU to transcode a
424 Nageru stream into a lower-bitrate one, replacing VLC.
426 - Work around a bug in some versions of NVIDIA's OpenGL drivers that would
427 crash Nageru after about three hours (fix in cooperation with Movit).
429 - Fix a crash with i965-va-driver 1.8.x.
431 - Reduce mutex contention in certain critical places, causing lower tail
432 latency in the mixer.
435 Nageru 1.6.0, May 29th, 2017
437 - Add support for having videos (from file or from URL) as a separate
438 input channels, albeit with some limitations. Apart from the obvious use of
439 looping pause clips or similar, this can be used to integrate with CasparCG;
440 see the manual for more details.
442 - Add a frame analyzer (accessible from the Video menu) containing an
443 RGB histogram and a color dropped tool. This is useful in calibrating
444 video chains by playing back a known signal. Note that this adds a
445 dependency on QCustomPlot.
447 - Allow overriding Y'CbCr input interpretation, for inputs that don't
448 use the correct settings. Also, Rec. 601 is now used by default instead
449 of Rec. 709 for SD resolutions.
451 - Support other sample rates than 48000 Hz from bmusb.
454 Nageru 1.5.0, April 5th, 2017
456 - Support for low-latency HDMI/SDI output in addition to (or instead of) the
457 stream. This currently only works with DeckLink cards, not bmusb. See the
458 manual for more information.
460 - Support changing the resolution from the command line, instead of locking
461 everything to 1280x720.
463 - The A/V sync code has been rewritten to be more in line with Fons
464 Adriaensen's original paper. It handles several cases much better,
465 in particular when trying to match 59.94 and 60 Hz sources to each other.
466 However, it might occasionally need a few extra seconds on startup to
467 lock properly if startup is slow.
469 - Add support for using x264 for the disk recording. This makes it possible,
470 among other things, to run Nageru on a machine entirely without VA-API
473 - Support for 10-bit Y'CbCr, both on input and output. (Output requires
474 x264 disk recording, as Quick Sync Video does not support 10-bit H.264.)
475 This requires compute shader support, and is in general a little bit
476 slower on input and output, due to the extra amount of data being shuffled
477 around. Intermediate precision is 16-bit floating-point or better,
480 - Enable input mode autodetection for DeckLink cards that support it.
481 (bmusb mode has always been autodetected.)
483 - Add functionality to add a time code to the stream; useful for debugging
486 - The live display is now both more performant and of higher image quality.
488 - Fix a long-standing issue where the preview displays would be too bright
489 when using an NVIDIA GPU. (This did not affect the finished stream.)
491 - Many other bugfixes and small improvements.
494 Nageru 1.4.2, November 24th, 2016
496 - Fix a thread race that would sometimes cause x264 streaming to go awry.
499 Nageru 1.4.1, November 6th, 2016
504 Nageru 1.4.0, October 26th, 2016
506 - Support for multichannel (or more accurately, multi-bus) audio,
507 choosable from the UI or using the --multichannel command-line
508 flag. In multichannel mode, you can take in inputs from multiple
509 different sources (or different channels on the same source, for
510 multichannel sound cards), apply effects to them separately and then
511 mix them together. This includes both audio from the video cards
512 as well as ALSA inputs, including hotplug. Ola Gundelsby contributed
513 invaluable feedback on this feature throughout the entire
516 - Support for having MIDI controllers control various aspects of the
517 audio UI, with relatively flexible mapping. Note that different
518 MIDI controllers can vary significantly in what protocol they speak,
519 so Nageru will not necessarily work with all. (The primary testing
520 controller has been the Akai MIDImix, and a pre-made mapping for
521 that is included. The Korg nanoKONTROL2 has also been tested and
522 works, but it requires some Korg-specific SysEx commands to make
523 the buttons and lights work.)
525 - Add a disk space indicator to the main window.
527 - Various bugfixes. In particular, an issue where the audio would pitch
528 up sharply after a series of many dropped frames has been fixed.
531 Nageru 1.3.4, August 2nd, 2016
536 Nageru 1.3.3, July 27th, 2016
538 - Various changes to make distribution packaging easier; in particular,
539 theme data can be picked up from /usr/local/share/nageru.
541 - Fix various FFmpeg deprecation warnings, now that we need FFmpeg
542 3.1 for other reasons anyway.
545 Nageru 1.3.2, July 23rd, 2016
547 - Allow limited hotplugging (unplugging and replugging) of USB cards.
548 You can use the new command-line option --num-fake-cards (-C) to add
549 fake cards that show only a single color and that will be replaced
550 by real cards as you plug them in; you can also unplug cards and have
551 them be replaced by fake cards. Fake cards can also be used for testing
552 Nageru without actually having any video cards available.
554 - Add Metacube timestamping of every keyframe, for easier detection of
555 streams not keeping up. Works with the new timestamp feature of
556 Cubemap 1.3.1. Will be ignored (save for some logging) in older
559 - The included default theme has been reworked and cleaned up to be
560 more understandable and extensible.
562 - Add more command-line options for initial audio setup.
565 Nageru 1.3.1, July 1st, 2016
567 - Various display bugfixes.
570 Nageru 1.3.0, June 26th, 2016
572 - It is now possible, given enough CPU power (e.g., a quad-core Haswell or
573 faster desktop CPU), to output a stream that is suitable for streaming
574 directly to end users without further transcoding. In particular, this
575 includes support for encoding the network stream with x264 (the stream
576 saved to disk is still done using Quick Sync), for Metacube framing (for
577 streaming to the Cubemap reflector), and for choosing the network stream
578 mux. For more information, see the README.
580 - Add a flag (--disable-alsa-output) to disable ALSA monitoring output.
582 - Do texture uploads from the main thread instead of from separate threads;
583 may or may not improve stability with NVIDIA's proprietary drivers.
585 - When beginning a new video segment, the shutdown of the old encoder
586 is now done in a background thread, in order to not disturb the external
587 stream. The audio still goes into a somewhat random stream, though.
589 - You can now override the default stream-to-card mapping with --map-signal=
592 - Nageru now tries to lock itself into RAM if it has the permissions to do
593 so, for better realtime behavior. (Writing the stream to disk tends to
594 fill the buffer cache, eventually paging less-used parts of Nageru out.)
596 - Various fixes for deadlocks, memory leaks, and many other errors.
599 Nageru 1.2.1, April 15th, 2016
601 - Images are now updated from disk about every second, so that it is possible
602 to update e.g. overlays during streaming, although somewhat slowly.
604 - Fix support for PNG images.
606 - You can now send SIGHUP to start a new cut instead of using the menu.
608 - Added a --help option.
610 - Various tweaks to OpenGL fence handling.
613 Nageru 1.2.0, April 6th, 2016
615 - Support for Blackmagic's PCI and Thunderbolt cards, using the official
616 (closed-source) Blackmagic drivers. (You do not need the SDK installed, though.)
617 You can use PCI and USB cards pretty much interchangeably.
619 - Much more stable handling of frame queues on non-master cards. In particular,
620 you can have a master card on 50 Hz and another card on 60 Hz without getting
621 lots of warning messages and a 10+ frame latency on the second card.
623 - Many new options in the right click menu on cards: Adjustable video inputs,
624 adjustable audio inputs, adjustable resolutions, ability to select card for
627 - Add support for starting with almost all audio processing turned off
630 - The UI now marks inputs with red or green to mark them as participating in
631 the live or preview signal, respectively. Red takes priority. (Actually,
632 it merely asks the theme for a color for each input; the theme contains
635 - Add support for uncompressed video instead of H.264 on the HTTP server,
636 while still storing H.264 to files (--http-uncompressed-video). Note that
637 depending on your client, this might not actually be more CPU efficient
638 even on localhost, so be sure to check.
640 - Add a simpler, less featureful theme (simple.lua) that should be easier to
641 understand for beginners. Themes are now also choosable with -t on the command
644 - Too many bugfixes and small tweaks to list. In particular, many memory leaks
645 in the streaming part have been identified and fixed.
648 Nageru 1.1.0, February 24th, 2016
650 - Support doing the H.264 encoding on a different graphics device from the one
651 doing the mixing. In particular, this makes it possible to use Nageru on an
652 NVIDIA GPU while still encoding H.264 video using Intel Quick Sync (NVENC
653 is not supported yet) -- it is less efficient since the data needs to be read
654 back via the CPU, but the NVIDIA cards and drivers are so much faster that it
655 doesn't really matter. Tested on a GTX 950 with the proprietary drivers.
657 - In the included example theme, fix fading to/from deinterlaced sources.
659 - Various smaller compilation, distribution and documentation fixes.
662 Nageru 1.0.0, January 30th, 2016