* commit 'ce70f28a':
  avpacket: Replace av_free_packet with av_packet_unref
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit 'a5d42043':
  avformat: Always return ref-counted AVPacket
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit 'f0ca6ffa':
  avprobe: Unref the packet once it is used
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit '9cbae3a7':
  roqvideodec: use av_frame_copy
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit '9f5d6f46':
  hap: Set avctx.bits_per_coded_sample
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit 'fe66671b':
  cmdutils: Check for and report the correct codec capability
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit '3c5cf2a3':
  screenpresso: Drop parameter change check
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit '447b5b27':
  mpegvideo_enc: Fix encoding videos with less frames than the delay of the encoder
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit '27eeee76':
  mpegvideo_enc: Merge ifs with identical conditions
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit 'f0a88d4d':
  mpegvideo_enc: Factor new_picture unref out
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit '533a6198':
  innoHeim/Rsupport Screen Capture Codec decoder
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit '233d2fa0':
  kvazaar: Add libkvazaar HEVC encoder
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

* commit '18f9308e':
  mpjpeg: Cope with multipart lacking the initial CRLF
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit '22f4d9c3':
  img2enc: Make sure the images are atomically written
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit '1ec72c6c':
  libx264: Make sure the extradata are padded
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit '5ea5a24e':
  movenc: Honor flush requests with delay_moov, when some tracks lack samples
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit 'e02dcdf6':
  rtsp: Allow $ as interleaved packet indicator before a complete response header
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit 'dca23ffb':
  lavc: Deprecate AVPicture structure and related functions

Deprecation flag on AVPicture struct replaced by a comment, as it causes
excess deprecation warnings for every include of avcodec.h
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

Reviewed-by: Lou Logan <lou@lrcd.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: AppChecker <support.appc@cnpo.ru>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

HWAccels with frame threads are fundamentally flawed in avcodecs current
design, and there are several known problems ranging from image corruption
to driver crashes.

These problems come down to two design problems in the interaction of
threads and HWAccel decoding:

(1)
While avcodec prevents parallel decoding and as such simultaneous access
to the hardware accelerator from the decoding threads, it cannot account
for the user code and its access to the hardware surfaces and the hardware
itself.

This can result in image corruption or even driver crashes if the
user code locks image surfaces while they are being used by the decoder
threads as reference frames.

The current HWAccel API does not offer any way to ensure exclusive access
to the hardware or the surfaces if frame threading is used.

(2)
Initialization of the HWAccel with frame threads is non-trivial, and many
decoders had and still have issues that cause excess calls to the
get_format callback.

This will potentially cause duplicate HWAccel initialization, which in
extreme cases can even lead to driver crashes if the HWAccel is
re-initialized while the user code is actively accessing the hardware
surfaces associated with it, or lead to image corruption due to lost
reference frames.

While both of these issues are solvable, fixing (1) would at least require
a huge API redesign which would move a lot of complexity into the user
code.

The only reason the combination of frame threads and HWAccel was
considered useful is to allow a seamless fallback to multi-threaded
software decoding if the HWAccel is not available, however the issues
outlined above far outweigh this.

The proper solution for a fallback is to re-open the AVCodecContext with
threading enabled if the HWAccel failed, which is a practice commonly used
by various user applications using avcodec today already.
Reviewed-by: Gwenole Beauchesne <gb.devel@gmail.com>
Reviewed-by: wm4 <nfxjfg@googlemail.com>
Signed-off-by: Hendrik Leppkes <h.leppkes@gmail.com>

Clang prerelease on Darwin is making the test fail.

Found-by: Ronald S. Bultje <rsbultje@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>

They barely fail on some systems by being off by 0.81.

Fixes crashes on fuzzed files
Fixes Ticket4969 part2
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Fixes crash
Fixes Ticket4969 part 1
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: Kyle Swanson <k@ylo.ph>

`av_packet_unref` matches the AVFrame ref-counted API and can be used as
a drop in replacement.

Deprecate `av_free_packet`.

And drop the av_dup_packet from the input_thread.

Make sure it does not leak packets.

CC: libav-stable@libav.org

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>