Using Minecraft 1.21, Fabric 0.15.11, fabric-api-0.100.6, replaymod-1.21-2.6.18.
No other mods running.
Mod is unable to complete a render, minecraft stops responding and has to force close.
I have tried various different resolutions, video formats and ffmpeg builds.
Minecraft is allocated 6GB of ram have tried as much as 12 with no effect.
Export.txt does seems to show all is normal until it suddenly stops rendering.
Even went as far as to install a fresh OS (laptop was due a fresh start anyway!) but same issue.
export.log
latest.log

Attached log files, any help is much appreciated.

I Have Same issue, My Logs is:
https://github.com/AkarinLiu/logs/raw/master/Minecraft/2024-07-24-3.log.gz

I am also having this issue, however, I'm using Fabulously Optimized with this mod on Fedora.

I did some more testing and it seems like the mod is crashing, rather than stating that Ffmpeg needs to be downloaded.