arm: Mark the stack as non-executable

If linking in an object file without this attribute set, the
linker will assume that an executable stack might be needed.

Signed-off-by: Martin Storsjö <martin@martin.st>
movenc: Add a fallback fragmentation method for plain mp4 as well

Previously the default fragmentation method was only enabled
if writing an ISM file.

Signed-off-by: Martin Storsjö <martin@martin.st>
gitignore: Add all examples below doc/examples
x86: dca: Add missing multiple inclusion guards
vf_interlace: deprecate lowpass option
avcodec/mpeg4videodec: set field durations to safe values when they are invalid

Fixes division by 0
Fixes: 3c980274cecaca6ca5d6e517c0c1983e-signal_sigabrt_7ffff7125425_410_cov_3621042467_2_audio_streams.avi
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '543156d7518f5e5d731123da066d86278f9fa492'

* commit '543156d7518f5e5d731123da066d86278f9fa492':
  arm: Mark the stack as non-executable

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '1e142d5b4842dcb39fcb0e92e4aacbc9977bfa66'

* commit '1e142d5b4842dcb39fcb0e92e4aacbc9977bfa66':
  movenc: Add a fallback fragmentation method for plain mp4 as well

Conflicts:
	libavformat/movenc.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
avformat/movenc: simplify code, decrease difference to libav

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '294a51e18ab7df4d658249361a03f0d716a4e9f0'

* commit '294a51e18ab7df4d658249361a03f0d716a4e9f0':
  gitignore: Add all examples below doc/examples

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'b23bc95920e2f10b9621857e829c45b064f356c0'

* commit 'b23bc95920e2f10b9621857e829c45b064f356c0':
  x86: dca: Add missing multiple inclusion guards

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge remote-tracking branch 'qatar/master'

* qatar/master:
  vf_interlace: deprecate lowpass option

Conflicts:
	libavfilter/version.h

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Fix dctdnoiz dependencies, the filter should select dct, not fft.

Fixes compilation with --disable-everything --enable-filter=dctdnoiz
avformat/utils: av_guess_frame_rate() favor avg_frame_rate if r_frame_rate has a comparably unlikely value

Fixes Ticket3399
Fixes Ticket2958

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
ffmpeg: reduce frame rate for mpeg4 to be within the spec limits

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>