Merge commit '662558f9'

* commit '662558f9':
  decode: copy the output parameters from the last bsf in the chain back to the AVCodecContext
  decode: flush the internal bsfs instead of constantly reinitalizing them
  h264_redundant_pps_bsf: implement a AVBSFContext.flush() callback
  vp9_superframe_bsf: implement a AVBSFContext.flush() callback
  vp9_superframe_split_bsf: implement a AVBSFContext.flush() callback
  h264_mp4toannexb_bsf: implement a AVBSFContext.flush() callback
  bsf: add a flushing mechanism to AVBSFContext

This commit is a noop, see
b33f5299
390f1564
63e0846c
e9980c45
2954e513
94fe138d
f631c328

Merged-by: James Almer <jamrial@gmail.com>