This patch adds support for encoding VP8 files with alpha. The alpha channel
is encoded separately and the output is placed in AVPacket's side_data. The
muxer then muxes it into the BlockAdditional element of the matroska container.
More details on spec here: http://goo.gl/wCP1ySigned-off-by: Vignesh Venkatasubramanian <vigneshv@google.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

This patch adds support for muxing VP8 Alpha Files. The Alpha channel data is
placed in BlockAdditional element of the matroska container. More information
& exact spec on how this is implemented can be found here: http://goo.gl/wCP1ySigned-off-by: Vignesh Venkatasubramanian <vigneshv@google.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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: Paul B Mahol <onemda@gmail.com>

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

* qatar/master:
  mpegvideo: allocate sufficiently large scratch buffer for interlaced vid

Conflicts:
	libavcodec/mpegvideo.c

See: 73db0bf1Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'db8e336e':
  pthread: reindent
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '30e25643':
  lavc/pthread: remove obsolete checks

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

* commit '16a645ad':
  vf_pixdesctest: make config_props work properly when called multiple times.
  vf_hqdn3d: make config_props work properly when called multiple times.
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '3fb29588':
  vf_drawtext: don't leak the expressions.
  vf_crop: make config_props work properly when called multiple times.
  vf_setdar: make config_props work properly when called multiple times.

Conflicts:
	libavfilter/vf_aspect.c
	libavfilter/vf_drawtext.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '4c205f42':
  vf_drawbox: make config_props work properly when called multiple times.
  vf_drawtext: do not reset the frame number in config_input.
  vf_fps: move initializing pts from config_props to init.

Conflicts:
	libavfilter/vf_drawbox.c
	libavfilter/vf_drawtext.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'd371c3c2':
  vf_frei0r: make config_props work properly when called multiple times.
  vf_gradfun: make config_props work properly when called multiple times.
  vf_lut: make config_props work properly when called multiple times.

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

* commit '1232a164':
  Apple Intermediate Codec decoder
  movenc: Don't add base_data_offset in tfhd for PIFF files

Conflicts:
	Changelog
	libavcodec/allcodecs.c
	libavcodec/avcodec.h
	libavcodec/codec_desc.c
	libavcodec/version.h
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '1fb013a5':
  vc1dec: Add support for interlaced B-frames

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

According to the PIFF specification[1] the base_data_offset field MUST be
omitteed. See section 5.2.17. Since the ISMV files created by ffmpeg state
that they are 'piff' compatible via 'ftyp' box, this needs to be corrected.

[1] http://www.iis.net/learn/media/smooth-streaming/protected-interoperable-file-formatSigned-off-by: Michael Niedermayer <michaelni@gmx.at>

MPV_decode_mb_internal needs 3 * 16 * linesize bytes of scratch buffer

For interlaced content, linesize is multiplied by two after the allocation
of the scratch buffer, and the dest_cr pointer ends past the buffer.

This patch makes ff_mpv_frame_size_alloc allocate a total of
(aligned line_size) * 2 * 16 * 3 bytes, which suffices even for the
interlaced case.

CC:libav-stable@libav.org
Signed-off-by: Jindrich Makovicka <makovick@gmail.com>
Signed-off-by: Anton Khirnov <anton@khirnov.net>

Those were useful when avcodec_thread_init() was a public functions. It
was deprecated and removed some time ago, so those checks are not needed
anymore.

Do not leak all the temp buffers.

Do not leak the x/y expressions.

Do not overwrite the variable set through AVOptions.

Do not overwrite the variables set through AVOptions.

Frame number should be incremented normally even if the link properties
change.

It should not be reinitialized if the link properties change.

Do not leak the initialized filter instance.

Do not leak the expressions.

This fixes a regression (reproducible since 1.2) and restores the
behaviour of 0.6, 0.7, 0.8, 0.9, 0.10, 0.11, 1.0 and 1.1.

This fixes reading files in Windows
Signed-off-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

According to the PIFF specification[1] the base_data_offset field MUST be
omitteed. See section 5.2.17. Since the ISMV files created by libavformat
state that they are 'piff' compatible via 'ftyp' box, this needs to be
corrected.

[1] http://www.iis.net/learn/media/smooth-streaming/protected-interoperable-file-formatSigned-off-by: Martin Storsjö <martin@martin.st>

Signed-off-by: Martin Storsjö <martin@martin.st>