Troubleshooting

When troubleshooting, make sure to read the entire error message, most of the time the text above the red error text is what explains the issue.

Here's a handful of common errors and how to solve them:

ffmpeg.exe is not installed/in PATH, ensure FFmpeg is installed

You need ffmpeg, see Smoothie's dependencies

*Smoothie crashing before any error can be read*

Run Smoothie by using launch.cmd and select your video. Smoothie will stay open and you can read the error. If there's no error message, it's likely a problem with your Send to shortcut.

Unrecognized option 'stats_period'

Remove -stats_period 0.15 from your recipe.ini's [miscellaneous] ffmpeg options: category because your ffmpeg installation is outdated and does not support updating the stats (size= 907KiB time=00:00:57.99 bitrate= 128.1kbits/s speed=68.6x) any faster than default.

Smoothie Recipe parser: setting XYZ has no parent category

Double check the syntax of your recipe config file. Make sure you're not using the config from the old smoothie-py or blur.

No valid videos were passed to smoothie

It means all of the input files it's gone through were not valid video files, ensure they're not corrupted / empty (0 bytes)

'X' is not an official yuv4mpegpipe pixel format

Your video is recorded in a color format that is unsuppored by SVPFlow (interpolation algorithm). Convert your video to a supported color format (NV12) or don't use interpolation (or use pre-interp instead).

VapourSynth Resize error 3074: no path between colorspaces (2/2/2 => 0/2/2)

This is due to some incompatible color convertion with your video during RIFE pre-interp, try changing your OBS' advanced color settings and see what works.

FFmpeg encoding error: Driver does not support the required nvenc API version.

Update your Nvidia GPU drivers or use others encoding arguments like H264/5 CPU, or UTVideo

Python exception: Source: The index does not match the source file

Ensure your video path doesn't have any non-english, special characters. The name of your file might be the problem, try renaming it.

Warning: Failed to load [...]\smoothie-rs\bin\vapoursynth64\plugins\librife.dll. GetLastError() returned 126. The file you tried to load or one of its dependencies is probably missing.

You're running this in a VM or do not have vulkan libraries installed.

The error is persisting or not listed here

Please make a support post on our Discord or contact me

Shout out z1xus and gem-storm for the base of most of this page