I have two wmv video file which 25fps.
I concatenate these video file using ffmpeg command line like this:

>ffmpeg -r 25 -f concat -i 1.txt -c copy output.wmv

1.txt:
file g:\1.wmv
file g:\2.wmv

It works. But the fps of output.wmv is 30.
How can I maintain the fps of concatenate video file?



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