How to set up ffmpeg?

Question

fmpeg

Hello. Help setting up ffmpeg.
I have pictures 600x600. And with them, I create videos. But I ran into 2 fine-tuning problems.
I am using this setup

ffmpeg -r 2 -i steps/img%06d.png -c:v libx264 -vf fps=25 -pix_fmt yuv420p video/out.mp4

What I want.
1. How to add audio to video.
2. I want a video extension of 1920 by 1024 so that the picture is centered and the background is white.

Thanks for the help!

Answer 1

1. Add a second input audio file with -i and specify a codec (-c:a libfdk_aac).
   
2. See overlay and scale filters. A white background can be obtained either as a separate image via -i (easier) or via a generator (lavfi input).