Rename write_{header,packet,trailer} to nut_write_{header,packet,trailer}
in order to make easier debugging them.

Fixes bug 28.

Replace it with newly introduced libavutil API.

It allows to search for options only with AVClass, without allocating
the corresponding context.

1<<31 overflows because 1 is signed, so force it to unsigned.
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

These caused scrambled error messages to be printed and
floating point exceptions.
For example when there was no decoder available for a
stream.
Signed-off-by: Anton Khirnov <anton@khirnov.net>

FF_API_LAME_GLOBAL_OPTIONS => FF_API_LAME_GLOBAL_OPTS

Thanks to Clément Bœsch for spotting.

Deprecate CODEC_FLAG_SVCD_SCAN_OFFSET

Deprecate CODEC_FLAG_H263P_SLICE_STRUCT

Deprecate CODEC_FLAG_OBMC

Deprecate CODEC_FLAG_H263P_AIV

Deprecate CODEC_FLAG_H263P_UMV

Deprecate CODEC_FLAG_ALT_SCAN

Deprecate CODEC_FLAG_EXTERN_HUFF

Deprecate CODEC_FLAG_PART

Deprecate CODEC_FLAG2_MEMC_ONLY

Deprecate CODEC_FLAG2_MBTREE

Deprecate CODEC_FLAG2_PSY

Deprecate CODEC_FLAG2_BIT_RESERVOIR

Deprecate CODEC_FLAG2_NON_LINEAR_QUANT

Deprecate CODEC_FLAG2_DROP_FRAME_TIMECODE

Deprecate CODEC_FLAG2_INTRA_VLC.

Fixes SA00072, SA00073, SA10150, SA10151, Issue2076

Improves SA10153
Signed-off-by: Anton Khirnov <anton@khirnov.net>

mjpeg: treat external huffman table setup failure as codec init failure if external huffman table use requested
Signed-off-by: Anton Khirnov <anton@khirnov.net>

It's been unused for the last 3 years.

Deprecate CODEC_FLAG2_AUD.

Deprecate CODEC_FLAG2_FASTPSKIP.

Deprecate CODEC_FLAG2_8X8DCT.

Deprecate CODEC_FLAG2_MIXED_REFS.

Deprecate CODEC_FLAG2_BPYRAMID.

Deprecate CODEC_FLAG2_BPYRAMID.

Deprecate CODEC_FLAG2_INTRA_REFRESH.

Deprecate CODEC_FLAG2_SSIM.

Replace '_' with '-', merge psy-trellis into psy-rd and rename cqp->qp
Also fix typo pdy-rd -> psy-rd