Fixes Ticket4256

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

This is also simpler
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

It seems more logical and works with more restricted C compilers
like tinycc.
Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>

Quite a few programs missed that detail of the spec
(including old versions of FFmpeg I believe) and when
we would otherwise fail anyway it seems worth a try
to use a simple byte-aligned stride instead.
Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>

* commit '8805589b':
  libopencv: Rework error handling in parse_iplconvkernel()
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '607ad990':
  dvbsubdec: check memory allocations and propagate errors

Conflicts:
	libavcodec/dvbsubdec.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'e71149a7':
  nuv: validate image size
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '7c51d79c':
  nsvdec: validate channels and samplerate

See: d633e15dMerged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'a536a4e4':
  lavc: support extracting audio service type from side data
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '32125781':
  mov: export audio service type as side data
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '4227e4fe':
  lavf: add a convenience function for adding side data to a stream

Conflicts:
	libavformat/internal.h
	libavformat/replaygain.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '728685f3':
  Add a side data type for audio service type.

Conflicts:
	doc/APIchanges
	libavcodec/avcodec.h
	libavcodec/version.h
	libavutil/frame.h
	libavutil/version.h
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '80a11de7':
  nutenc: do not use has_b_frames

Conflicts:
	libavformat/nutenc.c
	tests/ref/lavf/nut
	tests/ref/seek/lavf-nut

Mostly not merged, this is simply not correct
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'e44b5892':
  lavc: deprecate unused AVCodecContext.stream_codec_tag

Conflicts:
	libavcodec/mpegvideo.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

If this causes problems then the stream_codec_tag should be enabled again
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fix 'values' memory leak in case of error.

CC: libav-stable@libav.org
Bug-Id: CID 739879

Avoid a division by zero.

CC: libav-stable@libav.org
Bug-Id: CID 717750

Avoid a division by zero.

CC: libav-stable@libav.org
Bug-Id: CID 717749

* commit 'f771b3ab':
  avidec: do not export stream_codec_tag

Conflicts:
	libavformat/avidec.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '167e004e':
  h264: drop any pretense of support for data partitioning

Conflicts:
	libavcodec/h264.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '58ae8d59':
  h264_parser: restore a comment lost in 0268a54a

Conflicts:
	libavcodec/h264_parser.c

No change, the code that is commented is no longer there in the form to
which the comment applied
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'ecab21ac':
  h264: do not reset the ref lists in flush_change()
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '9404a47a':
  h264: move parser-only variables to their own context

Conflicts:
	libavcodec/h264_parser.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'cf1e0786':
  error_resilience: move the MECmpContext initialization into ER code

Conflicts:
	libavcodec/error_resilience.c
	libavcodec/h264.c
	libavcodec/h264.h
	libavcodec/h264_slice.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'a7e03804':
  avconv_dxva2: add hevc support

See: 5f2cdf9cMerged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '7e850fa6':
  Add DXVA2 HEVC HWAccel

Conflicts:
	configure
	libavcodec/allcodecs.c
	libavcodec/dxva2_hevc.c

See: 36962ad2Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'b82722df':
  hevc: reindent after previous commit

Conflicts:
	libavcodec/hevc.c

See: f8ecffa9Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'e72e8c5a':
  hevc: add hwaccel hooks

Conflicts:
	libavcodec/hevc.c
	libavcodec/hevc_refs.c

See: b2e9b0f5Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '4b95e95d':
  hevc: store the short term rps flag and size in the context

See: 06894f1aMerged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '36779a84':
  hevc: store the escaped/raw bitstream in HEVCNAL

See: 2af82a1aMerged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'b0593a4b':
  hevc: pass the full HEVCNAL struct to decode_nal_unit

Conflicts:
	libavcodec/hevc.c

See: 77140279Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '3a70c0c9':
  examples/transcode_aac: generate proper PTS and set the muxer timebase
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'c9b19ac8':
  examples/transcode_aac: fix a typo
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '749a89d1':
  examples/transcode_aac: properly select the output sample format
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '443b7192':
  hevc: unref the current frame if frame_start() fails

Conflicts:
	libavcodec/hevc.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '1dd02192':
  hevc: clear unused refs on failure
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'f9f883af':
  h264: simplify code in flush_dpb()

Conflicts:
	libavcodec/h264.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

Reviewed-by: compn <tempn@mi.rr.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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