Use this code snip to get all encoders: https://stackoverflow.com/a/38954520
On a 13" MacBook Pro 2019 (with T2)
2019-08-23 16:20:04.737 print-encoders[26396:2240602] 1752589105 com.apple.videotoolbox.videoencoder.hevc.ave HEVC Apple HEVC (AVE) Apple HEVC (AVE)
2019-08-23 16:20:04.737 print-encoders[26396:2240602] 1752589105 com.apple.videotoolbox.videoencoder.hevc.gva HEVC Apple HEVC (HW) Apple HEVC (HW)
2019-08-23 16:20:04.737 print-encoders[26396:2240602] 1752589105 com.apple.videotoolbox.videoencoder.hevc.vcp HEVC Apple HEVC (SW) Apple HEVC (SW)
(showing HEVC-related only)