v1.6.6

mrv2 and vmrv2 are open source professional players and review tools for VFX, animation and computer graphics for Windows, Linux and macOS. You can choose to compile from source or get binaries.

If you are unsure what binary to choose, go to:

https://mrv2.sourceforge.io/downloads/mrv2-download-page.html

mrv2 ships now in two compiled versions:

• mrv2 with OpenGL backend (free and donationware)
• vmrv2 with Vulkan backend (free and donationware)

It also ships for many more architectures, so be careful to download the correct one. It has NOT been tested on Windows aarch64 nor Linux aarch64 (beta testers wanted).

Unlocking Features

For unlocking features, once mrv2 loads, you should go to:

   Help->Unlock Features.

Donationware prices of binary licenses through PayPal:

License works for both mrv2 and vmrv2 (you can have both installed). You need to have an internet connection for the license system.

The donationware version when running without a donation, does not have:

- Annotations (available from Solo and later)
- Python (available in Standard and later)
- Editing (available in Edit and later)
- Voice and Link Annotations (available in Pro)
- Internet remote reviews from anywhere on the world (available in Pro+)

They do have, however:

- Tone-mapping (OpenGL) and HDR (Vulkan)
- OpenEXR layer switching
- Saving Images and Movies with Audio

Prices might change (go up or down) depending on competition and new features.

ChangeLog

• Docs: updated unlocking and licensing documentation.
• Docs: updated new panel looks.
• Docs: added WebRTC documentation.
• UI: Improved the look of Collapsible Groups and general UI.
• UI: Made sure all color schemes look pleasing. If you still don't like my color scheme, you can change the /colors/mrv2.colors text file.
• UI: Made thumbnails size in Panels be selectable with Preferences->Thumbnails->Panels. macOS now defaults to small panel thumbnails, as most artists use it from a laptop.
• UI: Made collapsible group flat instead of rounded for a more modern appearance.
• UI: Made Fl_Hor_Slider use a cyan slider button for being consistent with the rest of th UI:
• UI: Renamed S: and E: buttons on the timebar to I: and O: which is slightly clear for new users.
• UI Bug: Fixed Text Slider on Annotations Panel sometimes getting "stuck".
• UI: Made HorSlider's drag button use a cyan color.
• UI: Fixed restoring of image size in viewport when switching from Full Screen. This would effect mainly Kwin/Plasma on Linux.
• UI: Fixed Statistics panel to more correctly reflect the usage.
• UI: Windows' flickering panels while dragging between windows of different scale factors has been fixed, albeit the mouse may not move exactly with the window.
• UI: Added Compare/Add and Compare/Multiply modes to the menus as they were missing.
• UI: Added hotkeys for Compare/Add and Compare/Multiply modes.
• UI: Fixed menus in all natural languages as best as I could at least. Now the UI should look nice in a different language.
• UI: Allowed dragging of File clips without an image, coloring them cyan.
• Python: Fixed registering RationalTime and TimeRange under the mrv2 namespace. Now we just use opentimelineio directly, which would prevent opentimelineio from being imported. That does mean that if you were using mrv2.RationalTime or mrv2.TimeRange, you will need to update your scripts to use otime.RationalTime and otime.TimeRange.
• Python: Updated demos to use opentimelineio, instead of mrv2 equivalents.
• Python/UI: Added imports for opentimelineio in Python Panel.
• Core: Bug fixed Path parsing looking for negative values when there was a file named like 'image-01.png'. The minus was interpreted as a negative sign.
• Core: Bug fixed Path parsing comparing directories and files by length instead of actual strings.
• Core: Added MBOX and FIFO swap_interval() indicators to OpenGL build too.
• Core: Added __GL_SYNC_TO_VBLANK=0 to OpenGL Linux distro for NVidia cards' performance issues under Ubuntu 26.04 LTS/Gnome50.1.
• Core: Fixed OpenGL backend setting VSync always on at start, even when it was set to Never or Presentation Only.
• Build: Made macOS dylibs automatically use @rpath instead of relying on DYLD_LIBRARY_PATH, for being more compatible and allowing to code sign the installer later on.
• Build: Fixed missing OTIO dependency on Python.
• Build: Improved compilation performance of OpenSSL on Linux and Windows.
• Build: Improved compilation of Vulkan mrv2 by removing the dependency on glfw3.
• Build: Added and Improved bin/helpers/clean_* scripts to remove only portions of the compilation chain.
• Library: Python: Updated to v3.14.5.
• Library: Updated pyFTLK build.
• Library: Updated NDI to v6.3.2.
• Library: Updated OpenEXR to v3.4.12.
• Library: Updated OpenJPH to v0.27.3.
• Library: Updated pybind11 to v2.13.6.