Hi All,
I'm working on the kVTCompressionPropertyKey_ConstantBitRate under VideoToolBox session. It is available on ios 16.0 and above, but I got the kVTPropertyNotSupportedErr (-12900) on IPhone 11 (IOS 16.0). Can I get more information of what patterns of the hardware encoder's behaviors, such as what kinds of encoders support the kVTCompressionPropertyKey_ConstantBitRate, what kinds of encoders does not support the kVTCompressionPropertyKey_ConstantBitRate?
btw, kVTCompressionPropertyKey_ConstantBitRate supports IPhone 8 (IOS 16.1.1), same line of codes.
probably, I does not set compression property right, do I? Do we have any demonstrations of how to use the kVTCompressionPropertyKey_ConstantBitRate?
Sincerely, Melinda