Backport of "Gstvaapiencoder h264 append encoder exposure to aud" into 1.18
requested to merge tpm/gstreamer-vaapi:backport-mr-415-into-1.18-gstvaapiencoder_h264-append-ENCODER_EXPOSURE-to-aud into 1.18
Backport of !415 (merged) "Gstvaapiencoder h264 append encoder exposure to aud".
Commits:
- e1f6c37b gstvaapiencoder_h264: add ENCODER_EXPOSURE on aud propertie