What are the commands in ffmpreg?

Question

fmpeg

ffmpeg -i vid.mp4 -qscale:v 2 -r 25 -map 0:v -map 0:a -y vid_edit.mp4
Please tell me what exactly this command will do?
I understand the incoming and outgoing file, but it is not clear from the official documentation what exactly will happen thanks to these commands -qscale:v 2 -map 0:v -map 0:a

Answer 1

From here:
https://ffmpeg.org/ffmpeg.html
select video and audio stream from stream #0,
Set video quality to 2 on a scale of 1-31, where 1 is the best, 31 is the worst
. qscale is abbreviated as "q"
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