Is it illegal to video record a police officer in California from a safe distance with a smartphone?

I know it's illegal in other states. What law can I point to if a police officer approaches me in California after video recording them with a smartphone, and says it's illegal or that they want to have the footage?Is it illegal to video record a police officer in California from a safe distance with a smartphone?
It is 100% Legal in California to record police officers in public.
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Gathering information about government officials in a form that can readily be disseminated to others serves a cardinal First Amendment interest in protecting and promoting "the free discussion of governmental affairs." Mills v. Alabama, 384 U.S. 214, 218 (1966). Moreover, as the Court has noted, "freedom of expression has particular significance with respect to government because the state has a special incentive to repress opposition and often wields a more effective power of suppression.'" First Nat'l Bank, 435 U.S. at 777 n.11 (alteration in original) (quoting Thomas Emerson, Toward a General Theory of the First Amendment 9 (1966)). This is particularly true of law enforcement officials, who are granted substantial discretion that may be misused to deprive individuals of their liberties . . . "

"In our society, police officers are expected to endure significant burdens caused by citizens' exercise of their First Amendment rights. See City of Houston v. Hill, 482 U.S. 451, 461 (1987) ("[T]he First Amendment protects a significant amount of verbal criticism and challenge directed at police officers."). Indeed, "[t]he freedom of individuals verbally to oppose or challenge police action without thereby risking arrest is one of the principal characteristics by which we distinguish a free nation from a police state." Id. at 462-63. The same restraint demanded of law enforcement officers in the face of "provocative and challenging" speech, id. at 461 (quoting Terminiello v. Chicago, 337 U.S. 1, 4 (1949)), must be expected when they are merely the subject of videotaping that memorializes, without impairing, their work in public spaces."

"The presence of probable cause was not even arguable here. The allegations of the complaint establish that Glik was openly recording the police officers and that they were aware of his surveillance. For the reasons we have discussed, we see no basis in the law for a reasonable officer to conclude that such a conspicuous act of recording was "secret" merely because the officer did not have actual knowledge of whether audio was being recorded."Is it illegal to video record a police officer in California from a safe distance with a smartphone?
What state would this be illegal in? If the police are in public and you aren't obstructing their ability to enforce the law, then it's perfectly legal for you to film them all you want.