Merge commit 'f797b134cad4d248b1c8955659997980d0668bc3'

* commit 'f797b134cad4d248b1c8955659997980d0668bc3':
  rtpenc_chain: Don't copy the time base to the source stream by default

See: 1fe40e1b0538a8eb8425123c47775b5d141ae084
Merged-by: Michael Niedermayer <michaelni@gmx.at>

diff --cc libavformat/rtpenc_chain.c
Simple merge

diff --cc libavformat/rtsp.c
Simple merge

diff --cc libavformat/sapenc.c
Simple merge