(Total beginner) Trying to process an MP4 file using an AviSynth script, as follows: DirectShowSource(inputFile, fps=25, convertfps=true, logfile=logFile)
Error message: "DirectShowSource: couldn't open file SomeFile.mp4. Cannot play back the file. The format is not supported."
The file is valid, i.e. it can be played in a video player.
Using Windows 10 64-bit, and AviSynth 2.60
How can I process this file using AviSynth?