c sharp merging audio video

[OurIslam]

i try to merge a video merg audio
ffmpeg -i video.mp4 -i audio.mp3 -c copy merged_output.mp4
how can i do it with mediatoolkit c#

[OrhanTozan]

I also wanted to do this but I think you have to do it this way:

using (var engine = new Engine())
{
    engine.CustomCommand("-i video.mp4 -i audio.mp3 -c copy merged_output.mp4");
}

[WaGi-Coding]

i can't get custom commands to work

EDIT: Still no success :/