How to Check If an FFmpeg Filter is Supported

Finding out whether a specific audio or video filter is available in your local FFmpeg installation is crucial for troubleshooting command-line errors and ensuring script compatibility. This article provides a direct, step-by-step guide on how to query your system’s FFmpeg binary using the terminal to verify filter support and view detailed filter information.

Use the FFmpeg Filters Command

FFmpeg has a built-in command that lists all compiled filters. You can combine this command with command-line search tools to quickly check if a specific filter is supported on your system.

On Linux and macOS (Terminal)

Open your terminal and use grep to search for your desired filter:

ffmpeg -filters | grep "filter_name"

For example, to check if the scale filter is supported:

ffmpeg -filters | grep "scale"

On Windows (Command Prompt)

Open Command Prompt and use findstr to search for the filter:

ffmpeg -filters | findstr "filter_name"

On Windows (PowerShell)

If you are using PowerShell, use the following syntax:

ffmpeg -filters | Select-String "filter_name"

Understanding the Output Flags

When you run the filters command, FFmpeg returns a list with status flags on the left side of the filter name. The output looks similar to this:

 ... V->V scale             V->V   Scale the input video size and...

The letters before the filter name indicate its capabilities: * T: Support for timeline editing (the filter can be enabled/disabled at specific times). * S: Support for slice threading (the filter can use multiple CPU threads). * V: Video input/output. * A: Audio input/output. * |: Indicates input/output flow (e.g., V->V means Video input to Video output).

If the search returns no results, the filter is not compiled into your current FFmpeg build.

Get Detailed Information About a Specific Filter

If the filter is supported and you want to view its specific options, parameters, and documentation, run the help command directly for that filter:

ffmpeg -h filter=filter_name

For example, to view the details of the crop filter:

ffmpeg -h filter=crop

This will display all available arguments, default values, and flags for that specific filter on your system.