Fixes Ticket2972
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

This is in line with the other functions
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

This fixes compilation with MSVC and ICL, and makes ffhash consistent
with how the rest of the codebase uses read().
Reviewed-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

* qatar/master:
  lavc: add support for interleaved chroma formats to libx264.

Conflicts:
	libavcodec/libx264.c

See: 283fb76dMerged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'a454dec1':
  pixdesc: fix NV20* descriptors
  h264_sei: check SEI size
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '71cabb52':
  h264: do not discard NAL_SEI when skipping frames

Conflicts:
	libavcodec/h264.c

See: 7d75fb38Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'edaba180':
  h264: log extradata skip only for non-ignored NALs

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

* commit '26179964':
  h264_sei: log unknown sei messages

Conflicts:
	libavcodec/h264_sei.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '5f24fe82':
  mpegvideo: Initialize chroma_*_shift and codec_tag even if the size is 0

Conflicts:
	libavcodec/mpegvideo.c

The chroma_*_shift and codec_tag code was not under a size!=0 check in ffmpeg
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'd6d27f3e':
  configure: Enable -Qansi-alias for icl 14+
Merged-by: Michael Niedermayer <michaelni@gmx.at>

Interleaved chroma is x264's native format
Signed-off-by: Anton Khirnov <anton@khirnov.net>

They were inconsistent (overlapping fields and wrong sizes)
Signed-off-by: Anton Khirnov <anton@khirnov.net>

Setting AVDISCARD_NONREF (e.g. after flushing) resulted in 100% dropped frames.
Signed-off-by: Anton Khirnov <anton@khirnov.net>

Signed-off-by: Anton Khirnov <anton@khirnov.net>

Signed-off-by: Anton Khirnov <anton@khirnov.net>

Signed-off-by: Anton Khirnov <anton@khirnov.net>

This fixes breakage in a few fate tests on certain setups
(that for some reason didn't break on OS X) after the previous
commit (8812a805). Currently, some video streams are initialized
in ff_MPV_common_init with width/height set at 0 and only changed
to a proper video size with ff_MPV_common_frame_size_change later.

The breakage was diagnosed by Anton Khirnov.
Signed-off-by: Martin Storsjö <martin@martin.st>

Qansi-alias worked on 12.x, then caused miscompilation on 13.x, but now
works again passing all FATE tests for icl version 14.
Signed-off-by: Diego Biurrun <diego@biurrun.de>

* qatar/master:
  h263dec: Remove a hack that can cause infinite loops

Conflicts:
	libavcodec/h263dec.c

See: d2981b8eMerged-by: Michael Niedermayer <michaelni@gmx.at>

This may improve compatibility of lgpegs generated by libavcodec
also encoded ljpegs become slightly smaller
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

Signed-off-by: Lukasz Marek <lukasz.m.luki@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

The actual usefulness of the hack is not known, and it does cause
infinite loops with some broken input files.

CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>

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

* cigaes/master:
  lavfi/dualinput: reimplement on top of framesync.
  lavfi: add an API to synchronize multiple video inputs.
Merged-by: Michael Niedermayer <michaelni@gmx.at>

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

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

* qatar/master:
  movenchint: Clear size and len if the realloc failed

Conflicts:
	libavformat/movenchint.c

See: 63621762Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'f2b00a53':
  movenc: Return a proper error code for invalid combinations
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '23d6ba2c':
  vc1dec: Check the error handling flags on slice/field header decode errors
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'f7e61695':
  electronicarts: Check packet sizes before reading

Conflicts:
	libavformat/electronicarts.c

See: fb1ea777Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'ce67f442':
  lavf: Avoid setting avg_frame_rate if delta_dts is negative

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

Fix warning:
ffprobe.c:1684:21: warning: ‘start’ may be used uninitialized in this function [-Wmaybe-uninitialized] end = start + interval->end;

The warning is a false positive, since the variable is accessed only if
has_start is set, and in that case start has been already set.

* commit 'bb7bf175':
  vc1dec: Don't decode slices when the latest slice header failed to decode

Conflicts:
	libavcodec/vc1dec.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '5e25fdbf':
  vc1dec: Make sure last_picture is initialized in vc1_decode_skip_blocks

See: 09de0ffeMerged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'b772b0e2':
  vc1dec: Undo mpegvideo initialization if unable to allocate tables
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'ede50844':
  vc1dec: Fix leaks in ff_vc1_decode_init_alloc_tables on errors
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '91be1103':
  wnv1: Make sure the input packet is large enough

Conflicts:
	libavcodec/wnv1.c

See: f23a2418Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'f1eac2b8':
  movenc: Use keyframes as default fragmentation point in ismv
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'a9553bbb':
  movenc: Set all implicit flags immediately in mov_write_header
Merged-by: Michael Niedermayer <michaelni@gmx.at>