The incident mentioned by you, of 20-25 people coming with sticks and shouting foul words and threatening you, can at best amount to offences under Section 143, 506, 504 of IPC. Out of these, offence under Section 143 of IPC is cognizable, which means FIR can be registered with police. Try doing that. If the police does not register FIR, then you can file a private complaint with the Magistrate court.
Generally speaking, the photographs of the incident and audio recordings may be used in evidence in court. [Also see: Recording official telephone conversations].
In case you don’t have any option left and want to take divorce as a last resort, you should try to convince her for mutual consent divorce (see: Divorce by mutual consent – conditions and procedure). A unilateral divorce petition from you, which is opposed by her, may take long period to get decided, depending on amount of pendency in the court in your area. However, generally speaking, you should be in a position to use the evidence mentioned by you in your divorce petition. Please consult a local lawyer with full details of your case.
Dr. Ashok Dhamija is a New Delhi based Supreme Court Advocate and author of law books. Read more about him by clicking here. List of his Forum Replies. List of his other articles. List of his Quora Answers. List of his YouTube Videos.