Any tool suggestion for Video having audio track delay of 10 seconds.

Hi all,

I have a requirement for which i have been searching a video tool.

basically i need a audio video content, wherein video should start at the 1st second of playback
and audio should start from 10th second.

Condition: I require audio track to be starting from 10th second itself, i am not expecting audio track starting along with video on 1st second and maintaining silence till 10th second.

Note:
I know that using "-itsoffset" this could be done over ffmpeg.
But i am unable to validate the content whether it is really delayed in silence or did the audio track start from 10th second as i wanted.

Any suggestions please?
Any other tool apart from ffmpeg also could help, then kindly lemme know.


Thanks in advance
Nitin