This function generates a filename pattern for FFmpeg based on the number of
digits in the numeric part of the input file path (without the .png
extension).
Arguments
- x
A character vector of file paths, where each path should include a
filename with a .png extension.
Value
A character string representing the FFmpeg-compatible filename
pattern (e.g., "%03d.png" for filenames like "001.png").
Examples
atl_ffmpeg_pattern("path/to/file/001.png")
#> [1] "%03d.png"
# Returns: "%03d.png"
