Since the config_props function now references both the input and output
links, rename the 'link' variable to 'outlink'.

Fix up some mismatching indentation.

Don't bother setting the width and height on the outlink; the filter
framework does that for us.

The old version of the filter had a problem where it would queue up
all of the duplicate frames required to fill a timestamp gap in a
single call to filter_frame. In problematic files - I've hit this in
webcam streams with large gaps due to network issues - this will queue
up a potentially huge number of frames. (I've seen it trigger the Linux
OOM-killer on particularly large pts gaps.)

This revised version of the filter using the activate callback will
generate at most 1 frame each time it is called.

Allows to specify the action to be performed when reading the last frame
from the internal FIFO buffer. By default the last frame is written to
filter output depending on the timestamp rounding method. When using
"pass" action the last frame is passed through if input duration
has not been reached yet.

Examples using an input file with 25Hz, 1.4sec duration:
 - "fps=fps=1:round=near" generates an output file of 1sec
 - "fps=fps=1:round=near:eof_action=pass" generates an output file of
   2sec

Signed-off-by: Tobias Rapp <t.rapp@noa-archive.com>

Add missing AV_OPT_FLAG_FILTERING_PARAM flag to "start_time" option.
Fix indent of "round" named constants and clear unused field values.

Signed-off-by: Tobias Rapp <t.rapp@noa-archive.com>

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Fix ticket #2674
Tested with examples from ticket 2674.

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

(cherry picked from ffmpeg commit 0d24931604)

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

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

This also avoids droping the frame which is closest to the target timestamp

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

Signed-off-by: Lukasz Marek <lukasz.m.luki2@gmail.com>

Signed-off-by: Lukasz Marek <lukasz.m.luki2@gmail.com>

Fixes Ticket3329

Reviewed-by: Nicolas George <george@nsup.org>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

Fixes Ticket2905

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

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

When using AV_NOPTS_VALUE (which expands to INT64_C(0x8000000000000000))
as union initializer for a double field, the c99 converter needs to
interpret this constant when filling the union initializer, and it is
interpreted as a positive value.

When converting AV_NOPTS_VALUE to a double, MSVC 2010 ends up with
the same positive value as the c99 converter, while MSVC 2012 gets
a negative value.

This results in an infite loop in various FATE tests on MSVC 2012.

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

c99wrap choked on initialization of .dbl start_time option with
AV_NOPTS_VALUE: Unable to parse int64_t as expression primary

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

This allows for dropping or duplication to match a particular start time.

It should not be reinitialized if the link properties change.

Conflicts:

	libavfilter/avfilter.c
	libavfilter/vf_drawtext.c
	libavfilter/vf_lut.c
	libavfilter/vf_select.c
	libavfilter/vf_setpts.c
	libavfilter/vsrc_color.c
	libavfilter/vsrc_movie.c

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

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

Deprecate AVFilterBuffer/AVFilterBufferRef and everything related to it
and use AVFrame instead.

See cc650cf0 for more info.

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

Any alleged performance benefits gained from the split are purely
mythological and do not justify added code complexity.

By default, fps selects frames near PTS 0, 0.5, 1.5, 2.5, etc.
With round=down, it selects the frames near PTS 0, 1, 2, 3, etc.

A number of compilers, for example those from TI and IBM, choke on
these initialisers.  The current style is also quite ugly.

Signed-off-by: Mans Rullgard <mans@mansr.com>

This allows the iteration callbacks to discover the internal class and
options, and show them when required.

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