How to merge audio and video without compression?

Question

C++ / C#

I have audio and video (1080p).
I'm trying to merge:

await ffmpeg.ExecuteAsync([email protected]"-i video.mp4 -i audio.wav -c:v copy -c:a aac newVideo.mp4");

everything works, but the resolution changes to 720p

Answer 1

Put "-c:v copy" between "-i video.mp4" and "-i audio.waw", the option applies to the last specified source.

await ffmpeg.ExecuteAsync([email protected]"-i video.mp4 -c:v copy -i audio.wav -c:a aac newVideo.mp4");