Hi, first of all, thank you for this wonderful and efficient little tool!
I've started using Avidemux a long time ago (probably over a decade) to compile timelapse videos from photos. Many of these are astrophotography, shooting stars or northern lights timelapses, shot in conditions so dim that I have to take longer exposures than I'd like - the solution was to use the Change FPS filter's blend option in the old versions, so it would generate an intermediate frame between real frames, and I could have a 30 fps video from just 15 frames - double the duration, not as hectic movement in the skies.
However, this feature was removed in later versions. There is now a separate filter called Blend, but it only combines existing frames to speed up a timelapse - I need the opposite.
I've tried using the Change FPS, from 60 to 30 (like I did many years ago, when the Blend was still there), but that now just results in making the 30 fps project a 15.0x (randomly 15.01 or 15.02 or 15.04 etc) fps file. Here's one of the videos on Yt (https://www.youtube.com/watch?v=6WhbmsQ6y3Y) - since it's slow movement, it's not so apparent that it's just 15 fps, but if you click stats for nerds, you'll see it.
As a workaround, I've also tried combining it with the Resample FPS filter as that still has the Blend option:
Project of 30 fps -> Resample FPS to 60 with Blend enabled -> Change FPS 60 to 30 fps: and the end result is 30.0x fps (again randomly 30.01 or 30.02 or something similar).
Now this workaround works, but it's not very elegant - it would be nice if the slowing-down Blend could be added back. Or is there a better way to do this?
And these random fps numbers, I wish the set fps was better enforced. These are short clips (10-30s), maybe there's not enough granularity, but still. When I found out I'm only getting 15 fps, I resorted to DaVinci Resolve, and it could make it a clean 30.00 fps (however, Resolve is just overkill for this task, way too complicated, resource-hungry and wasteful, I don't like using it). It's kinda close enough, but before I start recompiling a few dozen timelapses, I thought I'd ask :) Should I open a separate topic for the fps issue?
Thanks!