2020-11-08
Zoom videos are a genre of 2D fractal animation. The rendering of the final video can be accelerated by computing exponentially spaced rings around the zoom center, before reprojecting to a sequence of flat images.
Some fractal software supports rendering EXR keyframes in exponential map form, which zoomasm can assemble into a zoom video. zoomasm works from EXR, including raw iteration data, and colouring algorithms can be written in OpenGL shader source code fragments.
Home: https://mathr.co.uk/zoomasm
Code: https://code.mathr.co.uk/zoomasm
Support: mailto:zoomasm@mathr.co.uk?subject=zoomasm
Donate: https://ko-fi.com/claudeha
Download: zoomasm-1.1
Making fractal zoom videos with kf-2.15 and zoomasm-1.0 : https://archive.org/details/making-fractal-zoom-videos-with-kf-2.15-and-zoomasm-1.0 / https://www.youtube.com/watch?v=72IIn7C3UeI
Charred Bard : https://archive.org/details/charred-bard / https://www.youtube.com/watch?v=NMKBBk-yf_4
Special Branch : https://archive.org/details/special-branch / https://www.youtube.com/watch?v=uQDV87vVIxk
kf-exp-map-flat-1 : https://archive.org/details/kf-exp-map-flat-1
64bit CPU and OS:
8GB RAM recommended (works with 4GB at low resolutions).
GPU and drivers supporting OpenGL 3.3 or later (OpenGL 4 is used when available).
8GB GPU VRAM recommended (works with 512MB at low resolutions).
FFmpeg program binary.
Get KF https://mathr.co.uk/kf/kf.html#kf-2.15.
KF version 2.15+ is required for exponential map export.
Launch it and zoom to where you want. It is recommended to enable Derivatives computation for analytic distance and slope colouring in zoomasm. Enabling Jitter is also recommended to avoid Moiré artifacts.
Set the Window Size in KF to 1152x128 (aspect ratio 9:1).
Set Image Size in KF to correspond to desired final video output resolution:
These are minimum recommendations, going bigger will give a higher quality final output video (you can go smaller too, for lower quality to save time).
The maximum keyframe size in zoomasm is limited by GPU capabilities, it is recommended to do a small test first to check that zoomasm will be able to handle your keyframes on your hardware.
Activate Exponential Map in the View menu. You may use PageUp and PageDown to fine tune final zoom level.
Choose which EXR Channels you want to save.
Store the zoom out sequence (be sure to save EXR!).
Wait while it renders (this is often the slow part of the process). You may use the about dialog (? menu) to block accidental input. Alternatively you can render from the command line without any window at all.
Quit KF.
presets/*.glsl. If a blank image results, pick a different one or check which image channels they need.ffmpeg (ffmpeg.exe on Windows).output.mp4). Select Output/Overwrite if the file already exists and you want to overwrite it.output.mp4 in VLC or similar.*.toml).*.toml). WARNING do not load session files from untrusted sources, because the path to the FFmpeg binary is stored in the file, which is invoked on load to get FFmpeg version information.*.7z).*.wav, *.flac, *.ogg, *.mp3). Detected sample rate, channels and duration are displayed below.0.000s (start of file).1.000x.*.exr).Colour button to choose colouring OpenGL GLSL shader fragment (*.glsl). Compilation status is displayed below including compilation error log. Examples in the presets/ folder include:
binary-decomposition.glsl: works best with linear smoothing and a custom bailout radius of 25. Uses N and T image channels. Needs a high sample count not to look awful.
cycling-waves.glsl: colour cycling demo. Uses N and NF image channels for the base colouring, as well as DEX and DEY for slope lighting effect. Uses the T argument (time) to animate colour cycling.
rainbow-fringe.glsl: simple black on white distance estimate with surrounding rainbows based on the DE direction. Uses the DEX and DEY image channels.
rgb-passthrough.glsl: just passes through the R, G, B image channels. Tends to look bad if the source keyframes used distance estimates or slopes in their colouring algorithm as the details near the center will be smaller than the edges (zoomasm has special compensation for the DEX and DEY channels).
text-overlay.glsl: same as the previous, but with text overlay using the Z argument (zoom depth in 2x zoom levels) displayed in the top-right corner (assumes 16:9 aspect ratio).
Watch checkbox to reload shader automatically when it is changed (hit save in your favourite text editor, see live colouring changes). The last successfully compiled shader is kept instead of displaying a blank image on errors (this is better for live coding).
Samples per pixel can be increased for better quality (smoother appearance in the center, less “sparkling” during animation) but at higher computational cost (on the GPU).
Shutter speed can be adjusted for motion blur, between 0% and 100% of frame duration (see Output/FPS).
Waypoints in the zoom animation are shown below.
The first (at the start of the soundtrack) and last (at the end of the soundtrack) cannot be deleted, the rest have a - button to remove them (permanently, no undo). If the Audio/Time slider is between two waypoints, a cursor appears in red, pressing its + button adds a new waypoint at that time. Each waypoint has a Z slider to set zoom depth (in terms of input EXR keyframe index) at the corresponding time (displayed on the left). The interpolation between waypoints is set by the Interpolation dropdown combo box, defaulting to (monotone) Cubic for smoother speed changes (other options are Step and Linear). Instantaneous zoom speed in 2x and 10x zooms per second is displayed below the cursor.
ffmpeg (or ffmpeg.exe on Windows) program binary. FFmpeg is needed for all formats apart from PPM image sequence. Detected ffmpeg version is displayed below.*.mp4, *.mkv, *.mov, *.ppm). Saving to foo-.ppm will write numbered frames starting foo-00000000.ppm, foo-00000001.ppm, etc. PPM is a simple lossless uncompressed binary bitmap image format with an ASCII metadata header at the start. It will take up a lot of space (21GB/min at 1920x1080p60) so it is recommended to encode directly with FFmpeg if possible, using any of the other formats.When no widget is active:
Space to toggle pause/play (when not recording).Backspace to reverse playback speed.Enter or Return to add a new waypoint at the current time.F9 to toggle the user interface transparency.F10 to toggle the user interface visibility.F11 to toggle fullscreen (only on primary monitor so far).You can press Tab to navigate between widgets, and Ctrl-clicking a slider allows to enter numbers more precisely.
--help (-h, -H, -?) displays zoomasm usage information.--version (-v, -V) displays version information of zoomasm and its supporting libraries.--source (-S) exports zoomasm’s source code archive to a file in the current working directory.--fullscreen (-f) starts in fullscreen mode (on primary monitor).--no-fullscreen (-F) starts in windowed mode (default).--gui (-g) show GUI on startup (default).--no-gui (-G) hide GUI on startup.--record (-r) activates recording on startup and quits when it has finished. Requires a session filename to do anything useful.--no-record (-R) normal interactive mode (default).*.toml) can be added to the command line, which will be loaded before anything else happens.Whether you are building for Windows or for Linux, you need:
sudo apt install git wget xz-utils build-essential p7zip pandoc texlive-latex-recommended-lstdc++fs to the build command in the src/Makefile.sudo nano /etc/apt/sources.list
# add the line:
deb-src http://deb.debian.org/debian unstable main contrib non-free
# then save and exit nano
sudo apt update
sudo apt install devscripts debhelper
sudo apt build-dep ilmbase
sudo apt build-dep openexr
apt source ilmbase
cd ilmbase-*/
debuild -uc -us -b -d
cd ..
sudo dpkg -i *.deb
sudo apt --fix-broken install
apt source openexr
cd openexr-*/
debuild -uc -us -b -d
cd ..
sudo dpkg -i *.deb
sudo apt --fix-broken installsudo apt install git libglew-dev libglfw3-dev libz-dev libopenexr-dev libfftw3-dev ffmpeg pkg-config
mkdir z
cd z
git clone https://code.mathr.co.uk/zoomasm.git
git clone https://github.com/ocornut/imgui.git
git clone https://github.com/AirGuanZ/imgui-filebrowser.git
git clone https://github.com/mackron/miniaudio.git
git clone https://github.com/marzer/tomlplusplus.git
cd zoomasm
make -C src zoomasm./src/zoomasmsudo apt install mingw-w64 wine64 cmake unzip-lstdc++fs to the build command in the src/Makefile.mingw-w64 6.0.0-3, which has a bug that prevents linking with the error:/usr/bin/x86_64-w64-mingw32-ld: \
/usr/lib/gcc/x86_64-w64-mingw32/8.3-win32/libstdc++fs.a(path.o):(.text$\
_ZNSt12experimental10filesystem2v17__cxx1116filesystem_error11_M_gen_whatEv+0x639):\
undefined reference to `std::filesystem::fs_err_concat(\
std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, \
std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, \
std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
collect2: error: ld returned 1 exit statusstd::thread etc, so configure that globally:sudo update-alternatives --config x86_64-w64-mingw32-g++
# select posix variant
sudo update-alternatives --config x86_64-w64-mingw32-gcc
# select posix variant
sudo update-alternatives --config x86_64-w64-mingw32-gfortran
# select posix variant (if installed)
sudo update-alternatives --config x86_64-w64-mingw32-gnat
# select posix variant (if installed)zoomasm expects dependencies to be installed into ~/win64/.
You need zlib:
mkdir -p ~/win64/src
cd ~/win64/src
wget -c https://zlib.net/zlib-1.2.11.tar.xz
tar xaf zlib-*.tar.xz
cd zlib-*/
export CPPFLAGS="-D__USE_MINGW_ANSI_STDIO=1"
export LDFLAGS="-static-libgcc -static-libstdc++ -Wl,-Bstatic -lpthread -Wl,-Bdynamic"
CC=x86_64-w64-mingw32-gcc ./configure --static --prefix=$HOME/win64
CC=x86_64-w64-mingw32-gcc make -j "$(nproc)"
CC=x86_64-w64-mingw32-gcc make installmkdir -p ~/win64/src
cd ~/win64/src
wget -c https://github.com/AcademySoftwareFoundation/openexr/archive/v2.5.3.tar.gz \
-O openexr-2.5.3.tar.gz
tar xaf openexr-*.tar.gz
cd openexr-*/
export CPPFLAGS="-D__USE_MINGW_ANSI_STDIO=1"
export LDFLAGS="-static-libgcc -static-libstdc++ -Wl,-Bstatic -lpthread -Wl,-Bdynamic"
mkdir -p build
cd build
cmake -DBUILD_SHARED_LIBS=OFF -DCMAKE_TOOLCHAIN_FILE=../cmake/Toolchain-mingw.cmake \
-DCMAKE_INSTALL_PREFIX=$HOME/win64 -DCMAKE_CXX_FLAGS=-I$HOME/win64/include \
-DZLIB_INCLUDE_DIR=$HOME/win64/include -DZLIB_LIBRARY=$HOME/win64/lib/libz.a ..
make -j "$(nproc)"
make installmkdir -p ~/win64/src
cd ~/win64/src
wget -c http://fftw.org/fftw-3.3.8.tar.gz
tar xaf fftw-*.tar.gz
cd fftw-*/
export CPPFLAGS="-D__USE_MINGW_ANSI_STDIO=1"
export LDFLAGS="-static-libgcc -static-libstdc++ -Wl,-Bstatic -lpthread -Wl,-Bdynamic"
./configure --host=x86_64-w64-mingw32 --prefix="${HOME}/win64" \
--enable-static --disable-shared --disable-doc --disable-alloca \
--enable-sse2 --enable-avx --enable-avx2 --enable-avx512 --enable-avx-128-fma \
--enable-generic-simd128 --enable-generic-simd256 --enable-fma \
--disable-dependency-tracking --disable-fortran --disable-threads \
--with-our-malloc --with-our-malloc16 --with-incoming-stack-boundary=2 \
--enable-portable-binary
make -j "$(nproc)"
make install
make checkmkdir -p ~/win64/src
cd ~/win64/src
git clone https://code.mathr.co.uk/zoomasm.git
git clone https://github.com/ocornut/imgui.git
git clone https://github.com/AirGuanZ/imgui-filebrowser.git
git clone https://github.com/mackron/miniaudio.git
git clone https://github.com/marzer/tomlplusplus.git
wget -c https://github.com/nigels-com/glew/releases/download/glew-2.1.0/glew-2.1.0.tgz
tar xaf glew-2.1.0.tgz
wget -c https://github.com/glfw/glfw/releases/download/3.3.2/glfw-3.3.2.bin.WIN64.zip
unzip glfw-3.3.2.bin.WIN64.zip
cd zoomasm
make -C src zoomasm.exewine ./src/zoomasm.exeTo encode videos, zoomasm.exe needs ffmpeg.exe. Builds are available via: https://ffmpeg.org/download.html#build-windows.
zoomasm-2.0)zoomasm-2.0)zoomasm-2.0)zoomasm-2.0)zoomasm-2.0)miniaudio takes so long to open a file (might need to decode the whole file to determine length, even for WAV?). (zoomasm-2.0)zoomasm-2.0)zoomasm-2.0)zoomasm-3.0)zoomasm-3.0)zoomasm-2.0)*.kfp or *.kfr. (zoomasm-2.0)zoomasm-2.0).glsl file. (zoomasm-2.0)zoomasm-3.0)zoomasm-3.0)zoomasm-3.0).zoomasm-2.0)zoomasm-2.0)zoomasm-2.0)Makefile to support parallel builds and object reuse. (zoomasm-2.0)zoomasm/COPYING.md: GNU Affero General Public License.README.md: documentation.INDEX.txt: list of files to include in source code release bundles. Remember to update when adding/removing files, and check that the source code release bundles build correctly.VERSION.txt: current zoomasm version. Should not be checked into version control (it is regenerated from git version information).zoomasm.css: style sheet for HTML website.zoomasm.png: screenshot for documentation.Makefile: top-level build system.zoomasm/src/Makefile: build system.s2c.sh: build system helper (text file contents to C source code).audio.cc, audio.h: audio playback and realtime scheduling.colour.cc, colour.h, main_frag.glsl, main_vert.glsl: colouring shader management.ffmpeg.cc, ffmpeg.h: interface to FFmpeg process.input.cc, input.h: input EXR keyframe loading.main.cc: main programoutput.cc, output.h: recording from OpenGL, and encoder setttings.process.h, process_posix.cc, process_win32.cc: abstraction for launching subprocesses with bidirectional communication on different operating systems.resource.h: common constants.session.cc, session.h: session management, version information and source code archive export.timeline.cc, timeline.h: waypoint sequencing.utility.cc, utility.h: miscellaneous utilities.gdb:handle SIGPIPE nostop noprint passReleases are signed with GPG key id EC470ECD90DDE39B6ED67CA6EBC1FED7E3FA39B0.
zoomasm-1.1.7z (sig)zoomasm-1.1-win.7z (sig)F9 key toggles user interface transparency..ppm output file saves an image sequence without FFmpeg.imgui changes.exrsubsample can be used without worrying about edge effects.presets/ folder in Windows distribution.imgui, miniaudio, tomlplusplus to latest versions. miniaudio needed a small patch to build as C++ void* casts must be explicit (unlike as in C); this will hopefully be fixed upstream soon.zoomasm-1.0.7z (sig)zoomasm-1.0.exe.7z (sig)zoomasm – zoom video assembler
Copyright (C) 2019,2020 Claude Heiland-Allen
This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License along with this program. If not, see https://www.gnu.org/licenses/.
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Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
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The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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Permission is hereby granted, free of charge, to any person obtaining a copy of this software and/or associated documentation files (the “Materials”), to deal in the Materials without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Materials, and to permit persons to whom the Materials are furnished to do so, subject to the following conditions:
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Copyright © 2002-2006 Marcus Geelnard
Copyright © 2006-2019 Camilla Löwy
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- Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
- This notice may not be removed or altered from any source distribution.
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The MIT License (MIT)
Copyright (c) 2014-2020 Omar Cornut
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
imgui-filebrowser is used under MIT license https://github.com/AirGuanZ/imgui-filebrowser
MIT License
Copyright (c) 2019-2020 Zhuang Guan
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Copyright (C) 1995-2017 Jean-loup Gailly and Mark Adler
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- This notice may not be removed or altered from any source distribution.
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THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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FFTW is Copyright © 2003, 2007-11 Matteo Frigo, Copyright © 2003, 2007-11 Massachusetts Institute of Technology.
FFTW is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. You can also find the GPL on the GNU web site: http://www.gnu.org/licenses/gpl-2.0.html
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Copyright (c) 2019-2020 Mark Gillard <mark.gillard
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Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.