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

See the earlier fix for movtextdec for details. The equivalent bug is
present on the encoder side as well.

We need to track the text length in 'characters' (which seems to really
mean codepoints) to ensure that styles are applied across the correct
ranges.

Signed-off-by: James Almer <jamrial@gmail.com>

* commit 'a2fc8dba':
  Add Haivision SRT protocol
Merged-by: James Almer <jamrial@gmail.com>

* commit '2124a97a':
  configure: Drop unused helper function test_cflags_cpp()

This commit is a noop. The function was replaced in
af7a75cbMerged-by: James Almer <jamrial@gmail.com>

* commit '434b44cd':
  configure: Simplify vararg check
Merged-by: James Almer <jamrial@gmail.com>

* commit '8c7554e6':
  configure: Add check_x86asm() helper function to simplify some expressions
Merged-by: James Almer <jamrial@gmail.com>

* commit '17ee5b0c':
  configure: Use indirection for the -o assembler flag also for x86asm
Merged-by: James Almer <jamrial@gmail.com>

* commit 'b9ea301e':
  configure: Use a more sensible suffix for x86 assembly tempfiles
Merged-by: James Almer <jamrial@gmail.com>

* commit '5292e97c':
  configure: Document available options for the --toolchain parameter
Merged-by: James Almer <jamrial@gmail.com>

* commit '86499771':
  qsv: align surface width/height to 16.
Merged-by: James Almer <jamrial@gmail.com>

* commit 'ea2f72a2':
  configure: Don't assume a 16 byte aligned stack on BSDs on i386
Merged-by: James Almer <jamrial@gmail.com>

* commit 'deefca02':
  qsvenc: add the Access Unit Delimiter NAL Unit support
Merged-by: James Almer <jamrial@gmail.com>

* commit '3d6e76b9':
  qsvenc: Fix a typo of FrameRateExtD/FrameRateExtN
Merged-by: James Almer <jamrial@gmail.com>

* commit '847190eb':
  configure: Don't assume an aligned stack on clang on windows
Merged-by: James Almer <jamrial@gmail.com>

Fixes: 2018_03_23_poc.wav
Found-by: GwanYeong Kim <gy741.kim@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: James Almer <jamrial@gmail.com>

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

Fixes ticket #6968

Set relevant filter parameters such that the result can easily be
checked with a waveform editor.
In particular, it makes it clear the silence_start is not accurate in
the current code.

0 is a valid value for silence_start

In mono mode, silence is detected in any single channel instead of all
of them simultaneously

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

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

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

Signed-off-by: James Almer <jamrial@gmail.com>

Signed-off-by: James Almer <jamrial@gmail.com>

Signed-off-by: James Almer <jamrial@gmail.com>

"color_space" is no longer a sytax element in libaom.
Signed-off-by: James Almer <jamrial@gmail.com>

Signed-off-by: James Almer <jamrial@gmail.com>

* commit '43778a50':
  Support AV1 encoding using libaom

This contains some extra changes taken from the libvpx encoder
wrapper, most of them contained in the set_pix_fmt() function.
Merged-by: James Almer <jamrial@gmail.com>

While the enums are defined in the libaom headers, it's not officially
supported.
Signed-off-by: James Almer <jamrial@gmail.com>

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

Fixes parsing of expressions like c0=c0+c0 or c0=c0|c0=c1.  Previously no
error was thrown and for input channels, only the last gain factor was used,
for output channels the source channel gains were combined.
Signed-off-by: Marton Balint <cus@passwd.hu>

The generic code should be able to finish the streams just fine initializing
and flushing the filters and codecs properly.

Fixes the following command:

ffmpeg -f lavfi -i "testsrc=d=0.1[out0];aevalsrc=0:d=0[out1]" -af apad -shortest -f framecrc -
Signed-off-by: Marton Balint <cus@passwd.hu>

Fixes ticket #6854 and the following simpler case:

ffmpeg -f lavfi -i testsrc=d=1 -f lavfi -i testsrc=d=0 -filter_complex overlay -f null none
Signed-off-by: Marton Balint <cus@passwd.hu>

* commit 'c438899a':
  Add AV1 video decoding support through libaom

This contains some extra changes taken from the libvpx decoder
wrapper, most of them contained in the set_pix_fmt() function.
Merged-by: James Almer <jamrial@gmail.com>

* commit '44a17310':
  ivf: Support VP9 and AV1 as well

See e8f0a463Merged-by: James Almer <jamrial@gmail.com>