riffenc: add option to ff_put_bmp_header to ignore extradata

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit fcbb94712d9873a37cdc8b526e368154b5982186)

Conflicts:
	libavformat/riffenc.c
avformat/riffenc: indent

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit f93b0abe4041b75f0dbb590ee932b37a07662856)

Conflicts:
	libavformat/riffenc.c
wtvenc: populate VIDEOINFOHEADER2

Fixes ticket #2835.

Signed-off-by: Peter Ross <pross@xvid.org>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 6da21c1f8190d674fd1e5619bb148c1bbab8ca3c)

Conflicts:
	tests/ref/lavf/wtv
	tests/ref/seek/lavf-wtv
nutenc/write_index: warn if 2 consecutive keyframes have the same PTS and discard the 2nd

This fixes an assertion failure and regression and restores previous behaviour
Fixes Ticket3197

An alternative would be to fail hard in this case and refuse to mux such data.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit de2a2caf4dedb28a959d0ff6f02751bb6c3ff033)