RE:Vision Effects Twixtor for Fusion v7.0




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RE:Vision Effects Twixtor for Fusion - featured

Intelligently slow down or speed up your image sequences with visually stunning results.

Twixtor takes advantage of proprietary tracking technology to accurately accelerate, decelerate or alter the frame rate of your video or image sequence. Work with precision while effectively tracking elements farther, and with less stretching and tearing when objects are crossing your subject or leaves the frame.


Twixtor Features

World class motion estimation

Twixtor is more accurate and exhibits fewer artifacts when there are objects crossing in the scene. This means less tearing and stretching of objects as they cross or go out of the frame.

No sweat

Retime using a single speed setting. Option to control retiming on frame-by-frame basis is always available!

Visually stunning results

In order to achieve unparalleled image quality we developed proprietary tracking technology that calculates motion for each individual pixel, enabling Twixtor to synthesize unique new frames by warping and interpolating frames of the original sequence.

Feature Specs

  • Speed Changes - Retime a sequence made possible using a single speed parameter.
  • Frame by Frame - Keyframable retiming for complete control on a frame by frame basis.
  • Retime 360 video - Twixtor tracks 360 footage and retimes properly taking into account the connectedness of the edges of the sides as well as the top and bottom.
  • Motion Blur - Contains an option to add or remove motion motion blur, as appropriate.
  • Enhance Dark Imagery - Option to automatically enhance dark imagery or imagery with poorly defined edges. In many cases, footage that was difficult to track becomes much more well-behaved upon retiming.
  • Cuts Marking - Support for marking material so that Twixtor does not motion-interpolate across a cut.
  • Interlaced Processing - Smart processing of interlaced material.
  • Object Separation - Support for foreground and background separation using a specified matte. Twixtor then tracks each layer separately for improved results.
  • RGB+A Tracking - An option that uses the alpha channel to help tracking of dark images with mattes. This is especially useful for CG, masked and/or keyed material.
  • Track Point Guidance - Up to 12 user-defined points can be specified to help guide Twixtor's motion estimation. By using the tracking points you can explicitly tell Twixtor where a pixel moves from one frame to the next in order to guide Twixtor's calculation of motion vectors.
  • Spline Guidance - When Twixtor exhibits tracking problems, you can guide Twixtor by simply creating and animating shapes to show Twixtor where objects are actually moving. Interactive feature registration is directed by using the host program's splines.
  • Motion Vector Import - Give Twixtor motion vectors generated elsewhere (like from a 3D system) to time remap footage, including adding motion-interpolated fields to otherwise progressive material.
  • Motion Vectors Export - Ability to output the motion vectors that Twixtor generates internally. This powerful feature comes with visual debugging modes to more intuitively assess and tune the quality of the motion estimation. The motion vectors can then be used elsewhere in the pipeline.
  • GPU accelerated - This product is GPU accelerated.

Twixtor in Action

Twixtor 360 Demo

Twixtor uses optical flow tracking on 360 footage taking into account the connectedness of the left and right sides of the 360 video, as well as the top and bottom.


Twixtor slow motion in action!

RE:Vision Effects’ Twixtor used to retime up to 160x slower than real time.


BMX Bike

Beautiful viral video by Oton Bacar 7D slow motion test footage of his friend doing bmx tricks.




Version 7.0 | April 19, 2018

  • Initial v7 release
  • Adds 360 video support
  • New option that uses the alpha channel to help tracking of dark images with mattes. This is especially useful for CG, masked and/or keyed material.
  • New option for linear footage that provides better tracking

Updates in Version 6.0

Speedups up to 3x on GPUs when using Twixtor, already known for their speed, have been measured over running in CPU mode. Speedups of this magnitude are usually seen with higher end cards and larger image sizes. Note that most currently-sold GPUs will provide customers with needed acceleration, including many mobile GPUs for laptops. Of course, the total speedup end-users will see will vary once application overhead is taken into account: this includes disk I/O, internal host buffering schemes, bandwidth of PCIe bus, codec used for footage, etc.

Version 6.3.2 | March 9, 2017

  • Fixes a crashing bug when splines are used in Fusion Studio 8.2 on Mac
  • 6.3.2b uploaded August 10, 2017 adds installer support for Fusion Studio 9

Version 6.3.1 | December 20, 2016

  • Fixed a bug where turning on GPU resulted in green frames on Mac OS 10.12 (Sierra) on some Mac models (mainly laptops).

What's new in Version 6.3 | November 1, 2016

  • Added an update checker for future version updating. The update check runs on the local machine, and must be manually run.
  • Fixes potential crashing bug when using images that have negative color values.

What's new in Version 6.2 | June 3, 2016

  • Adds Fusion Studio 8.0 support
  • Adds Macintosh support

What's new in version 6.1.2? Posted September 24, 2014:

  • Better GPU support with fewer failed GPU renders.
  • Fixed a crashing bug.
  • Fusion Studio 7, build 1420 and up
  • Fusion Studio 8, v8.2.1 and up
  • Fusion Studio 9, v9.0 and up

System Requirements

The same OS and hardware requirements for the version of Fusion Studio that you are using.

GPU Requirements and info

This applies to all host applications:

  • GPU with 1G memory officially supported. GPUs with 500m can work for our plug-ins, but are not officially supported.
  • Driver for GPU must support OpenCL 1.1. Note that Mac OS 10.7 and up automatically provides this compatibility. On Windows, check with your manufacturer for updated drivers for your GPU, and make sure you have one that supports OpenCL 1.1. We recommend the latest drivers available. Special note to Premiere Pro users: Premiere Pro need not support OpenCL for a particular GPU for us to work, see notes in the Premiere Pro section below.
  • Windows 7 or 8, 64-bit for GPU support. Vista is still supported for CPU mode.
  • Mac OS 10.7 or 10.8. Mac OS 10.6 still supported for CPU mode. It is highly recommended that when on Macintosh to use Mac OS 10.8 or later for the GPU mode of our plug-ins because the OpenCL drivers are more robust and run up to 30% faster than those of Mac OS 10.7.  For Intel HD Graphics GPUs, Mac OS 10.9 is required.
  • Important note for Macintosh users and nVidia cards: Make sure to update to the latest nVidia drivers and not rely solely on the drivers that come with the Mac OS.  http://www.nvidia.com/object/mac-driver-archive.html

Fusion specific GPU Info

First, we support GPU rendering in all modes of Fusion, including render-only uses of Fusion (Render-Slave). It is important to note that our GPU accelerated modes of our plug-ins can provide you with different results than on the CPU.  As such, it is not wise to mix CPU-generated images with GPU-generated images. If a GPU is not supported, or we run out of GPU memory to run on, our plug-ins will return a green frame to let you know.  So if you switch the Use GPU menu to ON and you see a green frame immediately, you know that you do not have a supported GPU.

We do not fallback to CPU rendering in the case where there is an error on the GPU during a rendering of a sequence, because then you might get CPU and GPU calculated images intermingled and may not understand why your sequences are not looking proper from frame to frame. When working completely on a single machine, you can simply pick GPU mode or CPU mode as you see fit… and render to RAM, to disk, etc. and all the frames will be rendered using the same mode. There are cases where you might send jobs out to machines on a render farm  and the set of machine(s) may be a mixture of GPU-supported and non-supported GPU (or no GPU); or conversely, you may know that all the machines that will be rendered on are all GPU-supported, or all are non GPU-supported.

As such, our plug-ins in Fusion that support GPU acceleration will present you with a “Use GPU” menu with 3 options:

OFF This option causes the plug-in to run on the CPU.  This mode should be used if you do not have a GPU that our plug-ins support.  In addition, the OFF setting might be advantageous if you will be sending a job to a render farm, and some machines have GPU support for our plug-ins, and others don’t.  By selection OFF (CPU mode) you can be assured that all frames across the render farm will run in the same mode (all CPU) and all frames will be consistently rendered.

ON This option forces the plug-in to run on the GPU.  If no GPU is present, or is not supported, a green frame is rendered.  If working solely on one machine, you can try the ON setting.  If you get a green frame, then your GPU is either not supported, or there is not enough GPU memory.  Another use for this setting can be to determine which machines on a render farm do not have GPU support by looking to see which machines return green frames.

ON, off for Render-Slave This mode is useful if your interactive session has a GPU, and you know that all your render farm machines do not all have GPU support for our plug-ins. With this option, uyou know that all machines on the render farm will render all frames consistently on CPU, and you don’t have to remember to switch the Use GPU setting from ON to OFF before sending to the render farm.  Note: we can still produce a green frame if we discover a supported GPU but run out of GPU memory, or other such error as the rendering progresses.

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