To: niranjaysingh
Dear user,
In answer to your questions:
1. You can use AVS Audio Editor to convert text into speech, please follow
this link to find the detailed information on how to do it.
2. Please use
screen capture application inside AVS Video editor to record video from screen.
3. You can use
AVS Video Editor to mute the audio track on the video and then place it manually on the position where it suits video better.
Please let me know if I can be of any further assistance to you.
Kind regards