Are body-mounted cameras the answer for transparency in police departments?

Not a cure-all, and many of the privacy and disclosure issues aren't resolved yet, but, in some ways, a far better situation:

The report found what seems to be a success in Rialto, Calif. Since 2012, all Rialto officers have worn body cameras. In the first year of the program, use of force by officers dropped 60 percent, and citizen complaints declined by 88 percent. (emphasis mine)
...
"Historically, there was no documentary evidence of most encounters between police officers and the public, and due to the volatile nature of those encounters, this often resulted in radically divergent accounts of incidents," Stanley wrote. "Cameras have the potential to be a win-win, helping protect the public against police misconduct, and at the same time helping protect police against false accusations of abuse."

Those are some crazy numbers.