This patch adds the ability to generate WebM DASH manifest XML using
ffmpeg. A sample command line would be as follows:

ffmpeg \
  -f webm_dash_manifest -i video1.webm \
  -f webm_dash_manifest -i video2.webm \
  -f webm_dash_manifest -i audio1.webm \
  -f webm_dash_manifest -i audio2.webm \
  -map 0 -map 1 -map 2 -map 3 \
  -c copy \
  -f webm_dash_manifest \
  -adaptation_sets “id=0,streams=0,1 id=1,streams=2,3” \
  manifest.xml

It works by exporting necessary fields as metadata tags in matroskadec
and use those values to write the appropriate XML fields as per the WebM
DASH Specification [1]. Some ideas are adopted from webm-tools project
[2].

[1]
https://sites.google.com/a/webmproject.org/wiki/adaptive-streaming/webm-dash-specification
[2]
https://chromium.googlesource.com/webm/webm-tools/+/master/webm_dash_manifest/Signed-off-by: Vignesh Venkatasubramanian <vigneshv@google.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Add functions and logic to matroskadec for use by the WebM DASH Manifest
XML Muxer. The actual muxer is added in a future patch.
Signed-off-by: Vignesh Venkatasubramanian <vigneshv@google.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

the libavfilter/vf_blackframe.c filter now not only logs detected
values, but also sets frame metadata. Currently, only `pblack` value is set
but `SET_META` macro has been introduced to ease development in the future.
Signed-off-by: Stepan Bujnak <stepan.bujnak@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

This simplifies the management of current_sps
Fixes Ticket3458
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

MSVC does not allow passing file pointers between libs
This API can thus not work with MSVC and as it was very recently added
and its it was in no release its removial should not cause any problems

A better API will be implemented, but its not finished yet, this revert is
to avoid potentially blocking the release
Found-by: Hendrik Leppkes <h.leppkes@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

draw_edges() should probably be moved somewhere else to avoid
mpegvideo*enc* dependency to decoders.

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

Fixes segfault
the size can probably be reduced further for the mpeg2 case
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

avcodec/mpegvideo_enc: workaround applications specifying intra dc level based on 8 and othes based on 0bit
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

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

Fixes Ticket3741
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

SPS features/flags:
- transform_skip_rotation_enabled_flag
- transform_skip_context_enabled_flag
- implicit_rdpcm_enabled_flag
- explicit_rdpcm_enabled_flag
- intra_smoothing_disabled_flag
- persistent_rice_adaptation_enabled_flag

PPS features/flags:
- log2_max_transform_skip_block_size
- cross_component_prediction_enabled_flag
- chroma_qp_offset_list_enabled_flag
- diff_cu_chroma_qp_offset_depth
- chroma_qp_offset_list_len_minus1
- cb_qp_offset_list
- cr_qp_offset_list
- log2_sao_offset_scale_luma
- log2_sao_offset_scale_chroma
(cherry picked from commit 005294c5b939a23099871c6130c8a7cc331f73ee)
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

- support for 4:2:2 and 4:4:4 up to 12 bits
- add a new profile for range extension
(cherry picked from commit d3c067fa65bbc871758d28aa07f54123430ca346)
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

(cherry picked from commit 6b3856ef57d66f2e59ee61fd2eb5f83b6d0d7d4a)
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

(cherry picked from commit ee71e9e9c12fc47856c452efb278f9f593a923ee)
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

(cherry picked from commit 8fafc96a9805d11bfe32537c8f78a294a5844065)
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

(cherry picked from commit f2c5f647cec786df26f442a85e6d685a131a50c9)
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

hevc/cabac: add new context for new syntax elements related to Rext(cherry picked from commit 6d71e2394f52679cfc8b86fb5880f89e6bd311d4)
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

hevc: cleaning up, remove unused constants(cherry picked from commit 7eed32d076c57aa03011d65a64903e8bdb633978)
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'f9900822':
  fate: Use the correct, local path to samples for opus reference files

Conflicts:
	tests/fate/opus.mak

See: ad7de822Merged-by: Michael Niedermayer <michaelni@gmx.at>

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

The AVStream.parser field is considered private and its location cannot be
preserved while preserving also ABI compatibility to libav, as libav added fields
before it.
Some tools like ffmpeg.c access this field though
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

This fixes running fate in configs where the samples are located
in a different path on the target.
Signed-off-by: Martin Storsjö <martin@martin.st>

Fixes Ticket3727
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

Fixes Ticket3708
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Based on a patch by Clément Bœsch <u@pkh.me>.
Signed-off-by: Timothy Gu <timothygu99@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

Fixes Ticket3761
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'acf91215':
  x86: dsputil: Avoid pointless CONFIG_ENCODERS indirection

Conflicts:
	libavcodec/x86/dsputil_init.c
	libavcodec/x86/dsputilenc_mmx.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'a8552ee3':
  ppc: dsputil: Coalesce all init files

Conflicts:
	libavcodec/ppc/dsputil_altivec.h
	libavcodec/ppc/dsputil_ppc.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Lukasz Marek <lukasz.m.luki2@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

ubitux maintains them. It seems it was forgotten to update MAINTAINERs though

See: Re: [FFmpeg-devel] [PATCH] MAINTAINERS: add Subtitle maintainer
     Message-ID: <20140713120546.GC26262@leki>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Reviewed-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>