Pressure mounts on the mayor of Canada's biggest city after police seize a video that appears to show him smoking drugs

Toronto Mayor Rob Ford is apologizing and acknowledging the need to make changes in his life but says he will continue in his job despite pressure to resign.

Ford made his remarks on his local weekly radio show Sunday at a time when he is facing mounting pressure to resign after police said they had obtained a copy of a video that appears to show him puffing on a crack cocaine pipe.

Ford did not specify what he was apologizing for.

He acknowledges making "mistakes" and that he can't change the past, but vows "to ride the storm out".

The embattled mayor reiterated on Saturday that he will not resign despite mounting pressure for him to step aside after police said they had obtained a copy of a video that appears to show the mayor puffing on a crack pipe.

Ford smiled outside his office and said: "No. As I told you before I'm not resigning."

Allegations that the mayor of Canada's largest city had been caught on the video smoking crack cocaine first surfaced in May. Two reporters with the Toronto Star and one from the US website Gawker said they saw the video but did not obtain a copy. Police Chief Bill Blair said he was "disappointed" in Ford at a news conference on Thursday in which he announced that the video had been recovered from a computer hard drive during an investigation of an associate of the mayor's suspected of providing him drugs.

The Toronto Board of Trade called for Ford to take a leave of absence, saying the mayor needs to put the city first. All four major Toronto newspapers have called on Ford to resign.

Deputy Mayor Norm Kelly, a Ford ally, said on Friday that he would meet Ford on Saturday to express the concerns of many city council members. Kelly said he hoped Ford would make the right decision.

More damaging information has also come to light about Ford's bizarre behaviour. A spokeswoman for the city of Toronto released a security incident report from city hall security guards who say they witnessed a "very intoxicated' Ford having trouble walking, sweating profusely and swearing at aides after St Patrick's Day in 2012.

The report states that at 2:30am the mayor "visited the security desk alone with a half empty bottle of St Remy French brandy". The report states the mayor said his car had been stolen and that he wanted to call police. Security informed Ford his car was at home and took the bottle from him before finding him a taxi.

City officials changed course and agreed to release the document after Toronto police confirmed they had obtained the crack video this week.

Toronto City councillor Shelley Carroll said Ford has hurt morale at city hall and urged him to take a leave of absence.

"The mayor's personal life has gradually overtaken his professional life and the findings that came to light over the week confirm many of the urban legends that existed," Carroll said. "We now know that mayor's personal life frequently, on a day to day basis, overshadows what he should be doing as a mayor."

Despite the pressure on Ford, municipal law makes no provision for his forced removal from office unless he is convicted and jailed for a criminal offence. Voters may have the final word in the October 2014 mayoral election in which Ford has said he plans to run.

Police said the video will come out when Ford's associate and occasional driver, Alexander Lisi, goes to trial on drug and extortion charges. Lisi, who was released on bail on Friday morning, is accused of threatening two alleged gang members who had been trying to sell the video to the media.

The mayor himself is not facing any charges. However, police have said they want to talk to him, but his lawyer has so far declined the request.