Original native Blender proxy with 49 frames at 24 fps and 1280 by 704 pixels
Render into a new folder with Blender using render-eden-proxy-study.py
From that output folder encode the silent reference

ffmpeg -framerate 24 -i frames/frame-%03d.png -c:v libx264 -pix_fmt yuv420p -movflags +faststart -an recording.mp4

49 frames at 24 fps last 49/24 seconds in the container and the last source timestamp is 2 seconds
The pinned EdenLive recording loader selects 4n+1 target frames so 49 already fits that count
This is a prepared original input study with no EdenLive runtime or tensor validation