Create mosaic with original frame rate

[Marco]

Hello, I'm pretty new to video processing and I came across this usuful tool.
Using the info I found on this web site I created a mosaic using four mp4 files (original frame rate is 60 fps).

I used the command described on the page and everything was fine, but the final output has 25 fps.

--> c:v libx264 output.mp4

I'd like to produce a final file with the same video quality ad settings of original.

I tryed to add option -crf 0 but it seems doesn't work.

What are the right settings?

[Carl Eugen Hoyos]

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