* commit 'a9ba5959':
  ac3dsp: Add some special-case handling for the C downmix function
Merged-by: Clément Bœsch <u@pkh.me>

* commit '43717469':
  ac3dsp: Reverse matrix in/out order in downmix()
Merged-by: Clément Bœsch <u@pkh.me>

use the option set by user
Reported-by: Lancelot Lai <laihy23@gmail.com>
Signed-off-by: Steven Liu <lq@chinaffmpeg.org>

Signed-off-by: Matthias Hunstock <atze@fem.tu-ilmenau.de>
Signed-off-by: Marton Balint <cus@passwd.hu>

Signed-off-by: Matthias Hunstock <atze@fem.tu-ilmenau.de>
Signed-off-by: Marton Balint <cus@passwd.hu>

fix the wrong comments for av_hwdevice_ctx_alloc()
Signed-off-by: Jun Zhao <jun.zhao@intel.com>
Signed-off-by: Mark Thompson <sw@jkqxz.net>

Reviewed-by: wm4 <nfxjfg@googlemail.com>
Signed-off-by: Marton Balint <cus@passwd.hu>

Should fix ticket #6252
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: James Almer <jamrial@gmail.com>

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: James Almer <jamrial@gmail.com>

Reviewed-by: Henrik Gramner <henrik@gramner.com>
Signed-off-by: James Almer <jamrial@gmail.com>

* commit '8ea35af7':
  avio: add a new flag for marking streams seekable by timestamp
Merged-by: James Almer <jamrial@gmail.com>

* commit '75c1db61':
  avio: cosmetics, prettify AVIO_SEEKABLE_NORMAL
Merged-by: James Almer <jamrial@gmail.com>

* commit '83548fe8':
  lavf: fix usage of AVIOContext.seekable
Merged-by: James Almer <jamrial@gmail.com>

Fixes: runtime error: shift exponent 255 is too large for 32-bit type 'unsigned int'
Fixes: 894/clusterfuzz-testcase-4841537823309824

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpegSigned-off-by: Michael Niedermayer <michael@niedermayer.cc>

Fixes: 873/clusterfuzz-testcase-5714546230558720

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpegSigned-off-by: Michael Niedermayer <michael@niedermayer.cc>

* commit '8d126793':
  x86/h264_weight: use appropriate register size for weight parameters

This commit is a noop, see 5ae0ad00Merged-by: James Almer <jamrial@gmail.com>

* commit '2caa93b8':
  mpegaudiodsp: Change type of array stride parameters to ptrdiff_t
Merged-by: James Almer <jamrial@gmail.com>

* commit '15b4f494':
  mss*: Change type of array stride parameters to ptrdiff_t
Merged-by: James Almer <jamrial@gmail.com>

* commit 'a339e919':
  ea: Change type of array stride parameters to ptrdiff_t
Merged-by: James Almer <jamrial@gmail.com>

* commit 'ba479f3d':
  hevc: Change type of array stride parameters to ptrdiff_t
Merged-by: James Almer <jamrial@gmail.com>

* commit 'e4a94d8b':
  h264chroma: Change type of stride parameters to ptrdiff_t
Merged-by: James Almer <jamrial@gmail.com>

* commit '2ec9fa5e':
  idct: Change type of array stride parameters to ptrdiff_t
Merged-by: James Almer <jamrial@gmail.com>

Aliased compressed AAC bytes are almost certainly not meaningful SBR
data. In the wild this causes harsh artifacts switching HE-AAC streams
that don't have SBR headers aligned with segment boundaries.

Turning off SBR falls back to a default set of upsampling parameters
that can function as a sort of error concealment. This is consistent
with how the decoder handles other sorts of errors.

Fixes memleak.
Reviewed-by: wm4 <nfxjfg@googlemail.com>
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: James Almer <jamrial@gmail.com>

Also make it more readable while at it.
Signed-off-by: James Almer <jamrial@gmail.com>

* commit 'b2939a75':
  blockdsp: Change type of array stride parameters to ptrdiff_t
Merged-by: Clément Bœsch <u@pkh.me>

* commit '3281d823':
  intrax8: Change type of array stride parameters to ptrdiff_t
Merged-by: Clément Bœsch <u@pkh.me>

* commit '92c5755a':
  hpeldsp: arm: Update comments left behind in 25841dfeMerged-by: Clément Bœsch <u@pkh.me>

* commit '009adfd4':
  x86: fpel: Remove unnecessary sign extend
Merged-by: Clément Bœsch <u@pkh.me>

* commit '956a5412':
  vaapi_h264: Set max_num_ref_frames to 1 when not using B frames
  vaapi_encode: Sync to input surface rather than output
  vaapi_encode: Check packed header capabilities
  vaapi_encode: Refactor initialisation

This merge is a noop, see:

ee1d04f9 vaapi_h264: Set max_num_ref_frames to 1 when not using B frames
94f446c6 vaapi_encode: Sync to input surface rather than output
478a4b7e vaapi_encode: Check packed header capabilities
c8241e73 vaapi_encode: Refactor initialisation
Merged-by: Clément Bœsch <u@pkh.me>

* commit '67d28f4a':
  examples/output: switch to the new encoding API

This commit is a noop, our examples are different. Still, we need to
update them to the new API, so doc/libav-merge.txt is updated.
Merged-by: Clément Bœsch <u@pkh.me>

* commit '7bf8db4d':
  tdsc: use the new decoding API
Merged-by: Clément Bœsch <u@pkh.me>

* commit 'de2ae3c1':
  lavc: add clobber tests for the new encoding/decoding API

The merge only re-order what we already have.
Merged-by: Clément Bœsch <u@pkh.me>

* commit '68811a41':
  mpegvideo_enc: use the new encoding API for b_strategy=2
Merged-by: Clément Bœsch <u@pkh.me>

* commit 'f03f78bc':
  mpegvideo_enc: handle encoding errors with b_strategy=2
Merged-by: Clément Bœsch <u@pkh.me>

* commit '6f733eca':
  mpegvideo_enc: add const to the AVCodec instance
Merged-by: Clément Bœsch <u@pkh.me>

* commit '6c09af7e':
  APIchanges: fix a typo in the version number

This commit is a noop (typo is not present in FFmpeg).
Merged-by: Clément Bœsch <u@pkh.me>

* commit '0e8d1fc1':
  lavu: Bump version for the 12bit Planar YUV support
  pixfmt: Add yuv444p12 pixel format
  pixfmt: Add yuv422p12 pixel format
  pixfmt: Add yuv420p12 pixel format

This merge is a noop, we already have all these pixel formats.
Merged-by: Clément Bœsch <u@pkh.me>