Use the i64 field rather than the string value. Using a string to set a
default sample/pixel format is weird, also the new interface is more
consistent with the rest of the API.

This is technically an API break, but hopefully there are no applications
using this feature outside of FFmpeg. In order to save backward
compatibility with mixed libraries in case libavutil is updated but not
the other libraries, some ifdeffery hacks are added.

Note that the version check is only performed when class->version != 0,
since if it is not defined then we assume that no version was defined and
the class is not affected by the change.

We will luckily get rid of the hack at the next major bump.

Fixes null pointer dereference

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
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>

* qatar/master:
  avplay: Do not use removed av_get_int()
  avconv: fix variable shadowing in configure_input_audio_filter()

Conflicts:
	ffmpeg_filter.c
	ffplay.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'e4d349b4':
  fate: h264: Add dependencies
  fate: ea: Add dependencies
  fate: Do not unconditionally run libavutil tests
  rtpenc_chain: Remove unused variable
  nuv: check for malloc failure when allocating extradata
  nuv: use the stream indices generated by avformat_new_stream()

Conflicts:
	tests/fate/ea.mak
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'c74f8178':
  nuv: cosmetics: pretty-printing

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

* commit '5c7bf2dd':
  lavf: move nuv fourcc audio tags from riff to nuv
  lavf: add a common function for selecting a pcm codec from parameters

Conflicts:
	libavformat/internal.h
	libavformat/mov.c
	libavformat/riff.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'bfe5454c':
  lavf: move ff_codec_get_tag() and ff_codec_get_id() definitions to internal.h
  lavf: move "MP3 " fourcc from riff to nut
  fate: vpx: Add dependencies
  fate: Fix wavpack-matroskamode test dependencies
  x86: dsputilenc: port to cpuflags

Conflicts:
	libavformat/internal.h
	libavformat/nut.c
	tests/fate/vpx.mak
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '1f3f8965':
  fate: Add dependencies for Vorbis, ProRes, QTRLE, utvideo tests
  fate: real: Add dependencies
  fate: lossless-audio: Add dependencies
  x86: h264dsp: Fix linking with yasm and optimizations disabled

Conflicts:
	libavcodec/x86/h264dsp_init.c
	tests/fate/lossless-audio.mak
	tests/fate/real.mak
Merged-by: Michael Niedermayer <michaelni@gmx.at>

Fixes build with lavfi disabled.
Signed-off-by: Diego Biurrun <diego@biurrun.de>

The version number is useful to check the libavutil version against which
the library was compiled at run-time, which in turn may be useful to deal
with binary compatibility issues.

Only enable component manual when the corresponding library providing
the feature is enabled.

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

* cus/stable:
  ffplay: increase maximum frame duration to 1 hour for streams without TS discontinuity
  ffplay: fix updating external clock after seeking
  ffplay: disallow seeking before the start of the file
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* qatar/master:
  vf_fieldorder: require write permissions
  vf_fieldorder: reindent

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

The commit has already been split and commited, this merge is just for metadata.
What has not been merged is the removial of some start/end_frame / draw_slice
related functions that are still in use. They can be removed once they are
unused.

* commit '565e4993':
  lavfi: merge start_frame/draw_slice/end_frame
Merged-by: Michael Niedermayer <michaelni@gmx.at>

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

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

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

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

this is needed for vf_null and a few others.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

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