Theeere it is.
This one got way bigger than planned but I'm finally done with 1.42 (I think lol).
Here's an overview of the biggest features, fixes and changes.
New: Support for HDR video interpolation (bt.2020)
New: Support for Alpha (Transparency) with RIFE NCNN VS with various codecs/formats
New: Smart passthu/transcoding for audio/subtitle tracks - Flowframes now decides for each aud...
2026-01-29 21:59:58 +0000 UTC View PostYeah, I said it'd be ready "in a few days" which was almost a month ago.
Buuut, I did actually make some notable progress in that time (also christmas was a thing).
Here's some important things that I noticed just when I was about to wrap things up, with most of them actually resulting in additional features and UX improvements.
What happened: I noticed some specific issues with Flowframes n...
2026-01-12 19:28:50 +0000 UTC View PostSo... it's been a while, again, and I'm sorry for that - lots of IRL things happening, plus my ADHD makes it very tempting to work new projects all the time, but I'm doing my best not to abandon major ones like Flowframes.
I've gained a lot of programming experience, both from my office job and my own projects (mostly my own lol) which means that I will inevitably refactor large parts of the Flowframes code sooner or later. I will upgrade to .NET 8 as well once I do that - Some of the U...
2025-12-11 23:24:21 +0000 UTC View PostUpdate: Release Candidate 4 is now the final release (Flowframes 1.41).
I noticed that I made some changes to RIFE NCNN VS in my development environment without copying the changes back to the repository, which caused the script to break in many scenarios.
I now fixed this, and also updated certain plugins and libaries. The implementation should now no longer error. If it still does, tell me and DM me log files.
I replaced the cloud install files, ...
2025-08-22 15:59:54 +0000 UTC View PostThird time's the charm...
With a bit of luck, the final release candidate.
I'm really sorry that I kept you waiting for so long, I got distracted by a lot of stuff going on IRL and neglected this project for a few weeks.
That said, I hope I'm back on track now, and here's the next and hopefully final RC of 1.41.0.
Changes since RC2:
Fixed:
- Custom output folder option was ignored
- Legacy deduplication dropdown was shown when deduplica...
Fixed:
- Custom output folder option was ignored
- Legacy deduplication dropdown was shown when deduplication is set to Disabled
Improved:
- Resolution modulo is now determined via pixel color format instead of encoder. This means that H264 or ProRes are no longer forced to a resolution that's divisible by 2 if 4:4:4 sampling is used
- [NCNN-VS] Video index files are now cached, which means interpolation starts much quicker now if you process a video more than once
- Ded...
Since RC1 did have some rather critical bugs/oversights, here's the next release candidate for 1.41.0.
Changes since RC1:
- Fixed batch processing queue not working properly
- It is no longer possible to add invalid (e.g. no path) GUI tasks to the queue
- Fixed multiple bugs regarding de-duplication and removed legacy (slow) method
- Fixed de-duplication being far too aggressive in certain scenarios
- Fixed rare issue where duplicate frame data was inval...
Sooo, I'll make this quick since I promised myself to release something before the year is over and I have less than 40 minutes left for that in my time zone.
First of all, sorry for the insane delay and the radio silence.
A lot has changed in my personal life, which made things more complicated, though that's not an excuse for the radio silence.
Anyway - I did work on Flowframes sporadically and got some new stuff. Sadly a lot of time also went into improving the codebase, ...
2024-12-31 22:40:17 +0000 UTC View PostSo once again, sorry for the massive delay as I was distracted by Stable Diffusion and other stuff.
Anyway - Here's, finally, a new Flowframes version.
It adds the latest RIFE 4.6 model to all implementations (NCNN/VS/CUDA), fixes some important bugs and UX issues.
The output format selection has been completely remade, replacing the entire settings tab. Instead, you can now pick the output container, codec, quality and color format independently, without needing to open the...
2023-02-23 11:11:57 +0000 UTC View PostHey everyone,
first of all, I'm sorry for the radio silence and the lack of Flowframes support in the recent months.
I started working on my Stable Diffusion GUI in September and ever since it kept me super busy, causing me to neglet my other projects.
I can ensure you that in the future I will do my best to better balance my time, and not leaving one project for another long-term.
Both Flowframes and Nmkoder will see some updates.
Currently there are no Patreon ...
2022-12-24 15:36:49 +0000 UTC View PostThis update adds real-time interpolation (currently without audio though), you can select it as an Output Mode.
Also, RIFE 4.4 and 4.3 have been added to both RIFE NCNN and RIFE CUDA.
Full changelog on Discord and in Flowframes.
2022-09-14 08:24:49 +0000 UTC View PostEven more fixes, and some additions.
Slowmo feature now works with RIFE-NCNN-VS, using image sequences as input now works again (and has a nicer workflow where you're prompted to enter a frame rate to use), RIFE 2.3 has been added to the RIFE-NCNN-VS models (only supports 2x though) for those who prefer it over 4.0, scene blending not working has been fixed, and some stuff has been updated (NCNN implementations and AV1 encoding should be slightly faster).
Full changelog on 2022-08-04 20:40:58 +0000 UTC View Post
More fixes and improvements regarding RIFE-NCNN-VS.
FPS limiting now works (just like regular RIFE-NCNN), and users who previously got the error "gpu_thread must be between 1 and x" should no longer have any issues.
Full changelog on Discord and in Flowframes.
2022-07-25 09:18:44 +0000 UTC View PostThis update primarily focuses on some things that were broken with the new VapourSynth implementation of RIFE (RIFE-NCNN-VS).
It now respects the GPU ID set in the settings (NCNN). However it currently can't do multi-GPU, so if you specified multiple IDs, it will only use the first one.
Trimming now also works with RIFE-NCNN-VS.
In addition, the VRAM/RAM usage should now be lower at very high (4K+) resolutions.
Full changelog on 2022-07-21 08:42:17 +0000 UTC View Post
So here it is, the first Flowframes version with VapourSynth-based RIFE, eliminating the need to store all the frames on disk.
Do keep in mind that some things don't work with the new implementation yet, like FPS limiting/downsampling.
Full changelog on Discord and in Flowframes.
2022-07-05 22:37:21 +0000 UTC View PostFlowframes 1.38 is coming soon, and there will be a game-changing new addition: VapourSynth-RIFE-ncnn-Vulkan has been integrated (called RIFE-NCNN-VS in Flowframes). This means you can interpolate videos without the need for frame extraction, frame saving, and separate encoding. With RIFE-NCNN-VS, everything is done on the fly in RAM - The video is decoded, inter...
2022-07-04 09:07:39 +0000 UTC View Post
Fractional interpolation now works fine with RIFE-NCNN, both scene detection and deduplication have been fixed.
Also, the RIFE 4.1 model has been added to RIFE CUDA and NCNN however the NCNN version seems to be broken and causes flickering. Stick to 4.0 for now.
Full changelog on Discord and in Flowframes.
2022-06-01 17:14:29 +0000 UTC View Post
So initially I wanted to fix deduplication and scene detection for fractional factors but it took a bit longer than expected, but that's not a big deal because I managed to add a bunch of other useful stuff in the meantime.
Custom interpolation are now enabled by default (instead of being a hidden config option), you can now set a target framerate with RIFE-NCNN, Flowframes should prevent Windows from going to sleep, video encoding (esp. AV1) is faster by default, plus some other small ...
2022-05-04 15:16:56 +0000 UTC View PostSorry for the long wait - I've been rather busy with Nmkoder and some IRL stuff.
Anyway, here it is - Flowframes 1.37, now with RIFE 4.0 on NCNN (for AMD/Intel GPUs).
Not only has it been added to NCNN, but it's also a lot faster, making RIFE-NCNN roughly as fast as the CUDA version.
With this new model, it's now also possible to interpolate with ANY factor, not just 4x/8x.
NCNN (unlike CUDA) even supports fractional factors, e.g. 2.5x to get from 24 to 60 FPS. However...
2022-04-17 18:23:20 +0000 UTC View Post
This update comes with the RIFE 4.0 model which improves quality over 3.9 while also being faster.
In addition, some bugs have been fixed.
Full changelog on Discord and in Flowframes.
2022-01-02 15:26:59 +0000 UTC View Post
RIFE has finally gotten another big update: It can now interpolate with any factor. It still has to be an integer (whole number) but apart from that you can now chose anything - 3x interpolation, 5x, 10x, whatever. It seems to get unstable at more than 16x but I don't think you'll need that anyway.
There is also a new RIFE model (3.9) which is 23% faster than 3.8, 54% faster than 3.1, and compared to 2.3 it's twice as fast! (Tested with 1080p 2x interpolation).
Additionally, WEBP ...
2021-12-01 19:34:23 +0000 UTC View Post
This update improves the slow-motion feature by changing the audio tempo to match the video speed. It also fixes some bugs and improves encoding efficiency for certain codecs.
Full changelog on Discord and in Flowframes.
2021-10-27 12:18:03 +0000 UTC View Post
This update adds something I actually wanted to add much earlier: Resuming unfinished encodes.
For now it requires auto-encode to be enabled. When an encode fails (or you manually cancel it) you can later drop the temp folder into Flowframes and it will resume, skipping the existing encoded chunks and only interpolating the remaining frames.
There have also been some improvements to audio transfer - MP3 can now be losslessly copied to MP4 outputs, the audio fallback now uses the s...
2021-10-01 10:32:11 +0000 UTC View PostAnother update that was planned as a minor update but ended up getting slightly bigger.
This update adds quality/compression options for image sequence exports (and fixes WEBP using the lowest quality by default).
There is now a server selection in the settings (Auto/EU/US), previously the server was always chosen automatically.
Also, the last used export mode now gets saved when you close and re-open Flowframes.
Full changelog on Discord and in Flowframes.
2021-09-13 16:08:25 +0000 UTC View Post
I originally planned to release a smaller 1.31.2 update, but I kinda kept adding new stuff and now it's easily big enough to be called 1.32.
This update adds a slow-motion option so you can easily make slowmo interpolations without having to adjust framerates or needing extra tools.
It also fixes and improves a lot of stuff regarding image sequence exports - WEBP export was fixed and auto-encode now also works for image sequences.
ProRes also got some fixes - Alpha now works...
2021-09-01 13:16:33 +0000 UTC View Post
This update fixes XVFI not working with embedded python runtime, and adds the missing checkbox to download XVFI in the models downloader.
2021-08-24 23:07:24 +0000 UTC View PostI ran into some unexpected problems with XVFI in combination with the embedded runtime. If you have the know-how you can use it with your own Python installation, otherwise wait a few days for my fix.
2021-08-24 19:30:26 +0000 UTC View PostSorry, I messed something up and the code for XVFI wasn't included in Flowframes 1.31.0.
If you need XVFI, please re-install 1.31.0, it should work now.
2021-08-24 17:58:26 +0000 UTC View Post
This update adds a new interpolation AI called XVFI - Read more about it here. It's sadly not faster than RIFE, but it allows for more interpolation factors like 3x or 5x.
But apart from this new AI, RIFE-CUDA and DAIN-NCNN now support more factors (16x for RIFE, 3x/5x/6x/7x for DAIN).
Full changelog on Discord and in Flowframes.
2021-08-24 14:27:32 +0000 UTC View PostThis update adds some neat features - Most importantly, you can now set an action that will run after interpolation has finished. For example, closing the app or putting your PC to sleep.
Flowframes now also shows desktop notifications when an interpolation finishes (if Flowframes is in the background).
Full changelog on Discord and in Flowframes.
2021-08-04 17:46:25 +0000 UTC View Post