img2: Add j2k file extension for JPEG 2000

Signed-off-by: Diego Biurrun <diego@biurrun.de>
pixdesc/pixfmt: Add XYZ colorspace for XYZ 12-bit values

Signed-off-by: Diego Biurrun <diego@biurrun.de>
libopenjpeg: Add support for XYZ colorspace, found in DCINEMA frames

Signed-off-by: Diego Biurrun <diego@biurrun.de>
bmpenc: get rid of BMPContext as it is unused

Signed-off-by: Paul B Mahol <onemda@gmail.com>
xwdenc: remove unused code

Signed-off-by: Paul B Mahol <onemda@gmail.com>
xbmenc: remove unused code

Signed-off-by: Paul B Mahol <onemda@gmail.com>
doc/filters: put separated geq variables in separate lines

Make clear that they are not aliases for the same variable.
doc/filters: fix erroneously truncated comment on a scale example
rtsp/rtp_read_header: Use RTP_MAX_PACKET_LENGTH instead of 1500

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
rtpdec: Increase max rtp packet size to 8192

Fixes Ticket2314
Fixes connecting to "Ceton InfiniTV4 PCIe & USB"

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
lavfi/afade: use standard options parsing

Signed-off-by: Paul B Mahol <onemda@gmail.com>
lavfi/noise: use standard options parsing

Signed-off-by: Paul B Mahol <onemda@gmail.com>
lavfi/blend: use standard options parsing

Signed-off-by: Paul B Mahol <onemda@gmail.com>
doc: move ffmpeg-codecs.texi content to separated file

This should simplify inclusion in monolithic tool manuals.
doc: move ffmpeg-formats.texi content to separated file

This should simplify inclusion in monolithic tool manuals.
doc: move ffmpeg-devices.texi content to separated file

This should simplify inclusion in monolithic tool manuals.
doc: move ffmpeg-resampler.texi content to separated file

This should simplify inclusion in monolithic tool manuals.
doc: move ffmpeg-scaler.texi content to separated file

This should simplify inclusion in monolithic tool manuals.
doc: enable compilation of -all tool pages

In particular, add documentation configuration system, through the
doc/config.texi file.

Fix trac issue #2374.
cmdutils: remove error message from opt_default() in case of missing option

A similar error message is generated by the calling function, avoid
duplication and spurious error message occurring with negated boolean
options introduced in 8bb5680, which can be reproduced for example with
the command:
ffmpeg -f lavfi -i testsrc=d=0.1 -nostdin -f null -