[FFmpeg-user] Required guidence for merging two audio packet

[Pradeep K C]

I need to mix the two rtp packet audio content using ffmpeg.

I tried using ffmpeg command as below, which is working perfectly.

 ffmpeg -f lavfi  -i "amovie=Voice-0001.amr [l]; amovie=Voice-0002.amr [r];
[l][r] amerge" -ac 1 a4.amr

But i want to convert this one into C program.
In that case inputs are not file based it is data.

Please guide me that how can do this.

Thanks & regards,
Pradeep