A 280 doesn't have video codec engine, only the X version of the 280.
http://en.wikipedia.org/wiki/Video_Codec_Engine
VCE 1.0
This version supports H.264 YUV420 (I & P frames), H.264 SVC Temporal Encode VCE, and Display Encode Mode (DEM).
It can be found on
Piledriver-based
Trinity APUs (Ax - 5xxx, e.g. A10-5800K)
Richland APUs (Ax - 6xxx, e.g. A10-6800K)
GPUs of the Southern-Island-Generation. These are
Radeon HD7700 series
Radeon HD7800 series
Radeon HD7900 series
Radeon R7 250X
Radeon R9 270 / 270X
Radeon R9 280X
VCE 2.0[edit]
Compared to the first version, VCE 2.0 adds H.264 YUV444 (I-Frames), B-frames for H.264 YUV420, and improvements to the DEM (Display Encode Mode), which results in a better encoding quality.
It can be found on
Steamroller-based
Kaveri APUs (Ax - 7xxx, e.g. A10-7850K)
Jaguar-based
Kabini APUs (e.g. Athlon 5350, Sempron 2650)
Temash APUs (e.g. A6-1450, A4-1200)
Puma-based
Beema and Mullins
GPUs of the Sea-Islands-Generation as well Bonaire or Hawaii GPUs, such as
Radeon R7 260 / 260X
Radeon R9 290 / 290X