1 Nageru and Futatabi 2.2.2, July 15th, 2023
3 - Fix build breaks with newer GCC and SVT-AV1.
6 Nageru and Futatabi 2.2.1, April 17th, 2023
8 - Work around an issue with OpenGL on Wayland, causing all
11 - Several fixes related to video inputs; in particular:
12 - Fix crashes when the master clock goes faster than 60 Hz
13 (which could happen primarily if an SRT input is the master).
14 - Be more resilient to errors in hardware video decoding
15 when the stream starts out broken (e.g., not on a key frame)
17 - Multiple fixes related to hardware acceleration on nVidia.
18 - Incoming frames of too high resolution (larger than 8 MB)
19 will be refused instead of crashing. Such videos may be
20 supported better in the future.
23 Nageru and Futatabi 2.2.0, November 15th, 2022
25 - Support AV1 output, via SVT-AV1. Note that this is still somewhat
26 experimental, not the least because SVT-AV1's streaming support
27 is not as mature as x264.
29 - Remove the dependency on QCustomPlot.
31 - Expose BlurEffect and UnsharpMaskEffect to the theme.
33 - Clean up several rarely-unused command-line flags:
34 - All the 10-bit flags are now collapsed to --10-bit.
35 - Remove --http-uncompressed-video.
36 - Remove the x264 VBV flags.
37 - Hide --x264-speedcontrol-verbose.
38 - Hide --no-flush-pbos.
40 - Make a workaround for audio monitoring output under PipeWire.
42 - Update CEF compatibility (tested with CEF 107).
45 Nageru and Futatabi 2.1.0, February 6th, 2022
47 - Support unsynchronized HDMI/SDI output.
49 This is for if you want just a monitor output without synchronizing
50 your entire stream chain to the output card (ie., you want to keep
51 some other camera as the master). Sound support is untested, and is
52 probably going to crackle a fair bit.
54 There's no GUI support for changing this currently (you enable it
55 by using --output-card-unsynchronized and then using HDMI/SDI output
58 - Support sending a separate x264 encode to disk
59 (--separate-x264-disk-encode and associated --x264-separate-disk-*
62 This is useful for machines that don't have Quick Sync, but where
63 you want to have an archival copy on disk in higher quality
64 than what you streamed out.
66 - Fix compilation issues with FFmpeg 5.0.
69 Nageru and Futatabi 2.0.2, September 3rd, 2021
71 - Fix issues with various upstream software:
72 DeckLink 11.7 (and newer) drivers, FFmpeg 4.4, newer CEF.
74 - Add a --no-transcode-video flag to Kaeru.
76 This is useful primarily if you want Kaeru to rewrap the stream into
77 Metacube (for Cubemap) and do nothing else with it. Only H.264
78 is supported for now, since everything else assumes that.
81 Nageru and Futatabi 2.0.1, July 9th, 2020
83 - Upgrade DeckLink SDK to 10.11.4.
88 Nageru and Futatabi 2.0.0, June 2nd, 2020
90 - Native support for SRT inputs; by default, Nageru will listen
91 for incoming connections on port 9710 and treat them as hotplugged
92 cameras. They do not need any special handling in the theme,
93 and can pick up e.g. the SRT stream ID to be used in the UI.
94 They generally have fewer limitations than using an srt:// URL
95 on an FFmpeg capture; e.g., there is no forced scaling, and they
96 can be used as master clock (although this is not generally
99 For license reaseons, please be sure that libsrt does not link to
100 OpenSSL when building Nageru.
102 - You do no longer need to set up a fixed amount of capture cards
103 at startup; by default, at least two will be created for you
104 (fake capture cards) as before, but if you have more, or hotplug
105 more, more slots will be automatically available, and will go
106 away (not take up any resources like fake capture cards do)
107 when unplugged. If you wish to artificially limit the maximum
108 number of cards like before, you can use the new switch
111 - MJPEG handling now includes 4:2:0 support in both Nageru and
112 Futatabi, as SRT inputs are often 4:2:0 and not 4:2:2.
114 - FFmpeg capture cards (including SRT cards) now use VA-API
115 hardware acceleration for decoding whenever available.
118 Nageru and Futatabi 1.9.3, April 12th, 2020
120 - Support (video-only) V4L2 output. The intended use case is output into
121 v4l2loopback to get into videoconferencing or the likes:
123 sudo apt install v4l2loopback-dkms
124 sudo modprobe v4l2loopback video_nr=2 card_label='Nageru loopback' max_width=1280 max_height=720 exclusive_caps=1
125 nageru --v4l-output /dev/video2
127 Start Nageru before any readers.
130 Nageru and Futatabi 1.9.2, March 29th, 2020
132 - Support handling white balance directly in Nageru, without themes
133 manually inserting a WhiteBalanceEffect or handling set_wb().
134 To use it, call scene:add_white_balance() instead of
135 scene:add_effect(WhiteBalanceEffect.new()). If using this functionality,
136 white balance will be properly propagated to the MJPEG feed and
137 through Futatabi, so that replays get the correct white balance.
138 Futatabi's UI will still be uncorrected, though.
140 - Make it possible to siphon out a single MJPEG stream, for remote
141 debugging, single-camera recording, single-camera streaming via
142 Kaeru or probably other things. The URL for this is /feeds/N.mp4
143 where N is the card index (starting from zero).
145 - The theme can now access some audio settings; it can get (not set)
146 number of buses and names, get/set fader volume, get/set mute,
147 and get/set EQ parameters.
149 - In Futatabi, it is now possible to set custom source labels, with
150 the parameter --source-label NUM:LABEL (or -l NUM:LABEL).
152 - When the playback speed changes in Futatabi, ease into the new speed.
153 The easing period is nominally 200 ms, but it will be automatically
154 shortened or lengthened (up to as much as two seconds in extreme
155 cases, especially involving very slight speed change) if this
156 helps getting back into a cadence of hitting the original frames.
157 This can mean significant performance improvements when ramping
158 from higher speeds back into 100%.
160 - Updates for newer versions of CEF (tested with Chrome 80).
162 - Various bugfixes and performance improvements.
165 Nageru and Futatabi 1.9.1, November 17th, 2019
167 - Support disabling optional effects if a given other effect is _enabled_
168 (typically for mutually exclusive effects).
170 - Make it possible for the theme to override the status line, by declaring
171 a function format_status_line() in the theme. Inspired by a C++ patch by
172 Alex Thomazo in the Breizhcamp repository.
177 Nageru and Futatabi 1.9.0, July 20th, 2019
179 - Significant reworking of the theme engine: Chains (now called scenes)
180 can now instantiate different versions behind-the-scenes instead of the
181 user having to worry about input types, low/high quality, or replacing
182 effects with others. Menus can have submenus and checkboxes. Finally, some
183 callbacks, such as num_channels(), have been replaced with easier-to-use
184 imperative functions, ie., an explicit call to Nageru.set_num_channels(N).
186 See the documentation for more information, or the included themes,
187 which have been ported to the new interfaces. Existing themes will continue
188 to run without modification, but the old interfaces are deprecated.
190 Martin Sandsmark contributed a bugfix to this work.
192 - Support cross-compilation. Patch from Helmut Grohne.
194 - Kaeru now has a parameter --disable-audio for transcoding streams
197 - Various bugfixes. In particular, work around an issue where Mesa's shader
198 cache interacts with Qt's EGL support to create a confusing crash with
199 “vertex shader lacks `main'”.
202 Nageru and Futatabi 1.8.6, April 19th, 2019
204 - Filenames for the recordings are now without colons; it caused
205 too much problems with various software, including most players.
210 Nageru and Futatabi 1.8.5, March 30th, 2019
212 - Experimental support for audio in Futatabi: The MJPEG export from
213 Nageru now supports audio, and Futatabi will store it and play it
214 back. Audio is currently only supported when playing at 100% speed
215 (no pitch shift or time stretching), and there is no audio output
216 to the Futatabi operator.
218 - Significant optimizations to MJPEG encoding, both when in use and when
224 Nageru and Futatabi 1.8.4, March 11th, 2019
226 - Various bugfixes, in particular for 32-bit platforms.
229 Nageru and Futatabi 1.8.3, March 10th, 2019
231 - Allow controlling video mixing from MIDI events. Adapted from a patch
232 by Yann Dubreuil, from the BreizhCamp repository.
234 - Use ALSA hardware timestamps for input; gives more stable delay.
235 Patch by Yann Dubreuil, from the BreizhCamp repository.
237 - For FFmpeg inputs, add an option for playing as fast as possible
240 - In Futatabi, support queueing and playing clips with no cue-out point.
241 This opens up for new and even faster UI workflows.
246 Nageru and Futatabi 1.8.2, January 19th, 2019
248 - Futatabi now supports MIDI controllers like Nageru, including an editor
249 and a sample mapping for the Behringer CMD PL-1.
251 - Futatabi now supports changing master speed during play, both via a
252 MIDI controller and the GUI.
257 Nageru and Futatabi 1.8.1, December 30th, 2018
259 - Futatabi can now communicate its queue status through a subtitle track,
260 and Nageru can consume it. This allows Nageru themes to get precise
261 information programmatically, e.g. to show status or automatically
262 switch away when the queue is about to end.
264 - Futatabi can now reuse the computed flow across successive frames when
265 interpolating between the same frame pair. This significantly reduces
266 the GPU load when doing super-slow motion (slower than 0.5x).
268 - Various smaller fixes.
271 Nageru and Futatabi 1.8.0, December 20th, 2018
273 - Initial release of Futatabi, a multicamera slow motion video server
274 designed to be used with Nageru. Futatabi is currently in alpha stage
275 and largely undocumented.
277 - Add support for multi-camera export from Nageru. A multi-camera stream
278 contains all frames from all camera inputs (unless overridden by
279 --mjpeg-export-cards), unprocessed except for MJPEG encoding.
280 MJPEG encoding is done in hardware (via VA-API) on Skylake or newer,
281 or using libjpeg otherwise. The intended user of this stream is Futatabi.
284 Nageru 1.7.5, November 11th, 2018
286 - Fix a bug where --record-x264-video would not work when VA-API was
287 not present, making the option rather useless (broken in 1.7.2).
288 Bug reported by Peter De Schrijver.
290 - The build system has been switched to Meson; see the README for new
293 - Various smaller fixes.
296 Nageru 1.7.4, August 31st, 2018
298 - Rework the x264 speedcontrol presets, again. (They earlier assumed
299 we could control B-frame settings on the fly, which we cannot with
300 threaded lookahead.) Also support x264 >= 153, which can support
301 multiple bit depths in the same library.
303 - Default to SDI inputs instead of HDMI.
305 - Add a mode to run in full screen (--fullscreen). Adapted from a patch
308 - Add support for lift/gamma/gain in the theme. Patch by Alexandre Thomazo.
311 Nageru 1.7.3, May 22nd, 2018
313 - When using multichannel audio, add a control for adjusting the
314 stereo width (from normal stereo to mono, all the way to
317 - Removed --http-coarse-timebase (it is now always on).
322 Nageru 1.7.2, April 28th, 2018
324 - Several improvements to video (FFmpeg) inputs: You can now use
325 them as audio sources, you can right-click on video channels
326 to change URL/filename on-the-fly, themes can ask for forced
327 disconnection (useful for network sources that are hanging),
328 and various other improvements. Be aware that the audio support
329 may still be somewhat rough, as A/V sync of arbitrary video
330 playout is a hard problem.
332 - The included themes have been fixed to properly make the returned
333 chain preparation functions independent of global state (e.g. if
334 the white balance for a channel was changed before the frame was
335 actually rendered). If you are using a custom theme, you may want
336 to apply similar fixes to it.
338 - In Metacube stream output, mark each keyframe with a pts metadata
339 block. This allows Cubemap 1.4.0 or newer to serve fMP4 fragments
340 for HLS from Nageru's output, without any further remuxing or
343 - If needed, Nageru will now automatically try to autodetect a
344 usable --va-display parameter by probing all DRM nodes for H.264
345 encoders. This removes the need to set --va-display in almost all
346 cases, and also removes the dependency on libpci.
348 - For GPUs that support querying available memory (in practice only
349 NVIDIA GPUs at the current time), expose the amount of used/total
350 GPU memory both on standard output and in the Prometheus metrics
351 (as well as included Grafana dashboard).
353 - The Grafana dashboard now supports heatmaps for the chosen x264
354 speedcontrol preset (requires Grafana 5.1 or newer). (There used to
355 be a heatmap earlier, but it was all broken.)
360 Nageru 1.7.1, March 26th, 2018
362 - Various bugfixes, mostly related to HTML and video inputs.
365 Nageru 1.7.0, March 8th, 2018
367 - Support for HTML5 graphics directly in Nageru, through CEF
368 (Chromium Embedded Framework). This performs better and is more
369 flexible than integrating with CasparCG over a socket. Note that
370 CEF is an optional component; see the documentation for more
373 - Add an HTTP endpoint for enumerating channels and one for getting
374 only their colors. Intended for remote tally applications;
375 set the documentation.
377 - Add a video grid display that removes the audio controls and shows
378 the video channels only, potentially in multiple rows if that makes
379 for a larger viewing area.
381 - Themes can now present simple menus in the Nageru UI. See the
382 documentation for more information.
387 Nageru 1.6.4, January 25th, 2018
389 - Fix compilation with the upcoming FFmpeg 3.5.
391 - Switch to LuaJIT for the theme engine, which is faster.
393 - Various bugfixes and smaller optimizations.
396 Nageru 1.6.3, November 8th, 2017
398 - Add quick-cut keys (Q, W, E, etc.) below the preview keys.
399 Since it's easy to hit these by accident and put up a signal
400 you didn't want, they are disabled by default (they can be
401 enabled in the video menu, or with the command line flag
404 - Rework the x264 speedcontrol presets to better match newer
407 - Add an option for changing the HTTP port (--http-port).
409 - Various smaller bug and integration fixes.
412 Nageru 1.6.2, July 16th, 2017
414 - Various smaller Kaeru fixes, mostly around metrics. Also,
415 you can now adjust the x264 bitrate in Kaeru (in 100 kbit/sec
416 increments) by sending SIGUSR1 (higher) or SIGUSR2 (lower).
419 Nageru 1.6.1, July 9th, 2017
421 - Add native export of Prometheus metrics.
423 - Rework the frame queue drop algorithm. The new one should handle tricky
424 situations much better, especially when a card is drifting very slowly
425 against the master timer.
427 - Add Kaeru, an experimental transcoding tool based on Nageru code.
428 Kaeru can run headless on a server without a GPU to transcode a
429 Nageru stream into a lower-bitrate one, replacing VLC.
431 - Work around a bug in some versions of NVIDIA's OpenGL drivers that would
432 crash Nageru after about three hours (fix in cooperation with Movit).
434 - Fix a crash with i965-va-driver 1.8.x.
436 - Reduce mutex contention in certain critical places, causing lower tail
437 latency in the mixer.
440 Nageru 1.6.0, May 29th, 2017
442 - Add support for having videos (from file or from URL) as a separate
443 input channels, albeit with some limitations. Apart from the obvious use of
444 looping pause clips or similar, this can be used to integrate with CasparCG;
445 see the manual for more details.
447 - Add a frame analyzer (accessible from the Video menu) containing an
448 RGB histogram and a color dropped tool. This is useful in calibrating
449 video chains by playing back a known signal. Note that this adds a
450 dependency on QCustomPlot.
452 - Allow overriding Y'CbCr input interpretation, for inputs that don't
453 use the correct settings. Also, Rec. 601 is now used by default instead
454 of Rec. 709 for SD resolutions.
456 - Support other sample rates than 48000 Hz from bmusb.
459 Nageru 1.5.0, April 5th, 2017
461 - Support for low-latency HDMI/SDI output in addition to (or instead of) the
462 stream. This currently only works with DeckLink cards, not bmusb. See the
463 manual for more information.
465 - Support changing the resolution from the command line, instead of locking
466 everything to 1280x720.
468 - The A/V sync code has been rewritten to be more in line with Fons
469 Adriaensen's original paper. It handles several cases much better,
470 in particular when trying to match 59.94 and 60 Hz sources to each other.
471 However, it might occasionally need a few extra seconds on startup to
472 lock properly if startup is slow.
474 - Add support for using x264 for the disk recording. This makes it possible,
475 among other things, to run Nageru on a machine entirely without VA-API
478 - Support for 10-bit Y'CbCr, both on input and output. (Output requires
479 x264 disk recording, as Quick Sync Video does not support 10-bit H.264.)
480 This requires compute shader support, and is in general a little bit
481 slower on input and output, due to the extra amount of data being shuffled
482 around. Intermediate precision is 16-bit floating-point or better,
485 - Enable input mode autodetection for DeckLink cards that support it.
486 (bmusb mode has always been autodetected.)
488 - Add functionality to add a time code to the stream; useful for debugging
491 - The live display is now both more performant and of higher image quality.
493 - Fix a long-standing issue where the preview displays would be too bright
494 when using an NVIDIA GPU. (This did not affect the finished stream.)
496 - Many other bugfixes and small improvements.
499 Nageru 1.4.2, November 24th, 2016
501 - Fix a thread race that would sometimes cause x264 streaming to go awry.
504 Nageru 1.4.1, November 6th, 2016
509 Nageru 1.4.0, October 26th, 2016
511 - Support for multichannel (or more accurately, multi-bus) audio,
512 choosable from the UI or using the --multichannel command-line
513 flag. In multichannel mode, you can take in inputs from multiple
514 different sources (or different channels on the same source, for
515 multichannel sound cards), apply effects to them separately and then
516 mix them together. This includes both audio from the video cards
517 as well as ALSA inputs, including hotplug. Ola Gundelsby contributed
518 invaluable feedback on this feature throughout the entire
521 - Support for having MIDI controllers control various aspects of the
522 audio UI, with relatively flexible mapping. Note that different
523 MIDI controllers can vary significantly in what protocol they speak,
524 so Nageru will not necessarily work with all. (The primary testing
525 controller has been the Akai MIDImix, and a pre-made mapping for
526 that is included. The Korg nanoKONTROL2 has also been tested and
527 works, but it requires some Korg-specific SysEx commands to make
528 the buttons and lights work.)
530 - Add a disk space indicator to the main window.
532 - Various bugfixes. In particular, an issue where the audio would pitch
533 up sharply after a series of many dropped frames has been fixed.
536 Nageru 1.3.4, August 2nd, 2016
541 Nageru 1.3.3, July 27th, 2016
543 - Various changes to make distribution packaging easier; in particular,
544 theme data can be picked up from /usr/local/share/nageru.
546 - Fix various FFmpeg deprecation warnings, now that we need FFmpeg
547 3.1 for other reasons anyway.
550 Nageru 1.3.2, July 23rd, 2016
552 - Allow limited hotplugging (unplugging and replugging) of USB cards.
553 You can use the new command-line option --num-fake-cards (-C) to add
554 fake cards that show only a single color and that will be replaced
555 by real cards as you plug them in; you can also unplug cards and have
556 them be replaced by fake cards. Fake cards can also be used for testing
557 Nageru without actually having any video cards available.
559 - Add Metacube timestamping of every keyframe, for easier detection of
560 streams not keeping up. Works with the new timestamp feature of
561 Cubemap 1.3.1. Will be ignored (save for some logging) in older
564 - The included default theme has been reworked and cleaned up to be
565 more understandable and extensible.
567 - Add more command-line options for initial audio setup.
570 Nageru 1.3.1, July 1st, 2016
572 - Various display bugfixes.
575 Nageru 1.3.0, June 26th, 2016
577 - It is now possible, given enough CPU power (e.g., a quad-core Haswell or
578 faster desktop CPU), to output a stream that is suitable for streaming
579 directly to end users without further transcoding. In particular, this
580 includes support for encoding the network stream with x264 (the stream
581 saved to disk is still done using Quick Sync), for Metacube framing (for
582 streaming to the Cubemap reflector), and for choosing the network stream
583 mux. For more information, see the README.
585 - Add a flag (--disable-alsa-output) to disable ALSA monitoring output.
587 - Do texture uploads from the main thread instead of from separate threads;
588 may or may not improve stability with NVIDIA's proprietary drivers.
590 - When beginning a new video segment, the shutdown of the old encoder
591 is now done in a background thread, in order to not disturb the external
592 stream. The audio still goes into a somewhat random stream, though.
594 - You can now override the default stream-to-card mapping with --map-signal=
597 - Nageru now tries to lock itself into RAM if it has the permissions to do
598 so, for better realtime behavior. (Writing the stream to disk tends to
599 fill the buffer cache, eventually paging less-used parts of Nageru out.)
601 - Various fixes for deadlocks, memory leaks, and many other errors.
604 Nageru 1.2.1, April 15th, 2016
606 - Images are now updated from disk about every second, so that it is possible
607 to update e.g. overlays during streaming, although somewhat slowly.
609 - Fix support for PNG images.
611 - You can now send SIGHUP to start a new cut instead of using the menu.
613 - Added a --help option.
615 - Various tweaks to OpenGL fence handling.
618 Nageru 1.2.0, April 6th, 2016
620 - Support for Blackmagic's PCI and Thunderbolt cards, using the official
621 (closed-source) Blackmagic drivers. (You do not need the SDK installed, though.)
622 You can use PCI and USB cards pretty much interchangeably.
624 - Much more stable handling of frame queues on non-master cards. In particular,
625 you can have a master card on 50 Hz and another card on 60 Hz without getting
626 lots of warning messages and a 10+ frame latency on the second card.
628 - Many new options in the right click menu on cards: Adjustable video inputs,
629 adjustable audio inputs, adjustable resolutions, ability to select card for
632 - Add support for starting with almost all audio processing turned off
635 - The UI now marks inputs with red or green to mark them as participating in
636 the live or preview signal, respectively. Red takes priority. (Actually,
637 it merely asks the theme for a color for each input; the theme contains
640 - Add support for uncompressed video instead of H.264 on the HTTP server,
641 while still storing H.264 to files (--http-uncompressed-video). Note that
642 depending on your client, this might not actually be more CPU efficient
643 even on localhost, so be sure to check.
645 - Add a simpler, less featureful theme (simple.lua) that should be easier to
646 understand for beginners. Themes are now also choosable with -t on the command
649 - Too many bugfixes and small tweaks to list. In particular, many memory leaks
650 in the streaming part have been identified and fixed.
653 Nageru 1.1.0, February 24th, 2016
655 - Support doing the H.264 encoding on a different graphics device from the one
656 doing the mixing. In particular, this makes it possible to use Nageru on an
657 NVIDIA GPU while still encoding H.264 video using Intel Quick Sync (NVENC
658 is not supported yet) -- it is less efficient since the data needs to be read
659 back via the CPU, but the NVIDIA cards and drivers are so much faster that it
660 doesn't really matter. Tested on a GTX 950 with the proprietary drivers.
662 - In the included example theme, fix fading to/from deinterlaced sources.
664 - Various smaller compilation, distribution and documentation fixes.
667 Nageru 1.0.0, January 30th, 2016