ffmpeg batch overlay Error: "Cannot find a matching stream for unlabeled input pad 1 on filter Parsed_overlay_0"

Question

I am trying to create a batch file to run this script to add a watermark on each file in a folder

ffmpeg -i input.mov -i watermark.png -filter_complex "overlay=10:10" output.mov

The script above works fine but when I try to run the batch I get Error: "Cannot find a matching stream for unlabeled input pad 1 on filter Parsed_overlay_0"

@echo off
REM Add watermark to video batch
for %%a in (*.mov) do ( ffmpeg "%%a" -i watermark.png -filter_complex "overlay=10:10" "output\%%~na.mov"
)
pause

What am I missing?

Answer 1

Looks like you forgot -i. Try:

@echo off
REM Add watermark to video batch
for %%a in (*.mov) do ( ffmpeg -i "%%a" -i watermark.png -filter_complex "overlay=10:10" "output\%%~na.mov"
)
pause