A list of Adler-32 checksums for each data plane.
@end table
+@section asoftclip
+Apply audio soft clipping.
+
+Soft clipping is a type of distortion effect where the amplitude of a signal is saturated
+along a smooth curve, rather than the abrupt shape of hard-clipping.
+
+This filter accepts the following options:
+
+@table @option
+@item type
+Set type of soft-clipping.
+
+It accepts the following values:
+@table @option
+@item tanh
+@item atan
+@item cubic
+@item exp
+@item alg
+@item quintic
+@item sin
+@end table
+
+@item param
+Set additional parameter which controls sigmoid function.
+@end table
+
@anchor{astats}
@section astats
Dynamic_range
Zero_crossings
Zero_crossings_rate
+Number_of_NaNs
+Number_of_Infs
+Number_of_denormals
and for Overall:
DC_offset
Peak_count
Bit_depth
Number_of_samples
+Number_of_NaNs
+Number_of_Infs
+Number_of_denormals
For example full key look like this @code{lavfi.astats.1.DC_offset} or
this @code{lavfi.astats.Overall.Peak_count}.
@item lfe_high
Set LFE high cut off frequency. By default, this is @var{256} Hz.
+@item lfe_mode
+Set LFE mode, can be @var{add} or @var{sub}. Default is @var{add}.
+In @var{add} mode, LFE channel is created from input audio and added to output.
+In @var{sub} mode, LFE channel is created from input audio and added to output but
+also all non-LFE output channels are subtracted with output LFE channel.
+
+@item angle
+Set angle of stereo surround transform, Allowed range is from @var{0} to @var{360}.
+Default is @var{90}.
+
@item fc_in
Set front center input volume. By default, this is @var{1}.
@item fc_out
Set front center output volume. By default, this is @var{1}.
+@item fl_in
+Set front left input volume. By default, this is @var{1}.
+
+@item fl_out
+Set front left output volume. By default, this is @var{1}.
+
+@item fr_in
+Set front right input volume. By default, this is @var{1}.
+
+@item fr_out
+Set front right output volume. By default, this is @var{1}.
+
+@item sl_in
+Set side left input volume. By default, this is @var{1}.
+
+@item sl_out
+Set side left output volume. By default, this is @var{1}.
+
+@item sr_in
+Set side right input volume. By default, this is @var{1}.
+
+@item sr_out
+Set side right output volume. By default, this is @var{1}.
+
+@item bl_in
+Set back left input volume. By default, this is @var{1}.
+
+@item bl_out
+Set back left output volume. By default, this is @var{1}.
+
+@item br_in
+Set back right input volume. By default, this is @var{1}.
+
+@item br_out
+Set back right output volume. By default, this is @var{1}.
+
+@item bc_in
+Set back center input volume. By default, this is @var{1}.
+
+@item bc_out
+Set back center output volume. By default, this is @var{1}.
+
@item lfe_in
Set LFE input volume. By default, this is @var{1}.
@item lfe_out
Set LFE output volume. By default, this is @var{1}.
+@item allx
+Set spread usage of stereo image across X axis for all channels.
+
+@item ally
+Set spread usage of stereo image across Y axis for all channels.
+
+@item fcx, flx, frx, blx, brx, slx, srx, bcx
+Set spread usage of stereo image across X axis for each channel.
+
+@item fcy, fly, fry, bly, bry, sly, sry, bcy
+Set spread usage of stereo image across Y axis for each channel.
+
+@item win_size
+Set window size. Allowed range is from @var{1024} to @var{65536}. Default size is @var{4096}.
+
@item win_func
Set window function.
Similarity percentage with the above color.
0.01 matches only the exact key color, while 1.0 matches everything.
+@item blend
+Blend percentage.
+0.0 makes pixels either fully gray, or not gray at all.
+Higher values result in more preserved color.
+
@item yuv
Signals that the color passed is already in YUV instead of RGB.
@end example
@end itemize
+@section colorhold
+Remove all color information for all RGB colors except for certain one.
+
+The filter accepts the following options:
+
+@table @option
+@item color
+The color which will not be replaced with neutral gray.
+
+@item similarity
+Similarity percentage with the above color.
+0.01 matches only the exact key color, while 1.0 matches everything.
+
+@item blend
+Blend percentage. 0.0 makes pixels fully gray.
+Higher values result in more preserved color.
+@end table
+
@section colorlevels
Adjust video input frames using levels.
By default, @var{YYYY-MM-DD HH:MM:SS} format will be used.
@end table
+@subsection Commands
+
+This filter supports altering parameters via commands:
+@table @option
+@item reinit
+Alter existing filter parameters.
+
+Syntax for the argument is the same as for filter invocation, e.g.
+
+@example
+fontsize=56:fontcolor=green:text='Hello World'
+@end example
+
+Full filter invocation with sendcmd would look like this:
+
+@example
+sendcmd=c='56.0 drawtext reinit fontsize=56\:fontcolor=green\:text=Hello\\ World'
+@end example
+@end table
+
+If the entire argument can't be parsed or applied as valid values then the filter will
+continue with its existing parameters.
+
@subsection Examples
@itemize
@end example
@end itemize
+@section lagfun
+
+Slowly update darker pixels.
+
+This filter makes short flashes of light appear longer.
+This filter accepts the following options:
+
+@table @option
+@item decay
+Set factor for decaying. Default is .95. Allowed range is from 0 to 1.
+
+@item planes
+Set which planes to filter. Default is all. Allowed range is from 0 to 15.
+@end table
+
@section lenscorrection
Correct radial lens distortion
@example
'scale2ref[b][a];[a][b]overlay'
@end example
+
+@item
+Scale a logo to 1/10th the height of a video, while preserving its display aspect ratio.
+@example
+[logo-in][video-in]scale2ref=w=oh*mdar:h=ih/10[logo-out][video-out]
+@end example
@end itemize
@anchor{selectivecolor}
@item blum
Set the blue luma coefficient.
+
+@item alternate
+If @code{intensity} is negative and this is set to 1, colors will change,
+otherwise colors will be less saturated, more towards gray.
@end table
@anchor{vignette}
Default is @code{3}.
@end table
+@section xmedian
+Pick median pixels from several input videos.
+
+The filter accept the following options:
+
+@table @option
+@item nb_inputs
+Set number of inputs. This must be odd number.
+Default is 3. Allowed range is from 3 to 255.
+
+@item planes
+Set which planes to filter. Default value is @code{15}, by which all planes are processed.
+@end table
+
@section xstack
Stack video inputs into custom layout.
Multiple values can be used when separated by '+'. In such
case values are summed together.
+For 2 inputs, a default layout of @code{0_0|w0_0} is set. In all other cases,
+a layout must be set by the user.
+
@item shortest
If set to 1, force the output to terminate when the shortest input
terminates. Default value is 0.
@end example
@end itemize
+@section colorkey_opencl
+RGB colorspace color keying.
+
+The filter accepts the following options:
+
+@table @option
+@item color
+The color which will be replaced with transparency.
+
+@item similarity
+Similarity percentage with the key color.
+
+0.01 matches only the exact key color, while 1.0 matches everything.
+
+@item blend
+Blend percentage.
+
+0.0 makes pixels either fully transparent, or not transparent at all.
+
+Higher values result in semi-transparent pixels, with a higher transparency
+the more similar the pixels color is to the key color.
+@end table
+
+@subsection Examples
+
+@itemize
+@item
+Make every semi-green pixel in the input transparent with some slight blending:
+@example
+-i INPUT -vf "hwupload, colorkey_opencl=green:0.3:0.1, hwdownload" OUTPUT
+@end example
+@end itemize
+
@section overlay_opencl
Overlay one video on top of another.
@item limit
Time limit for the pauses. Any pause longer than that will be considered
a timestamp discontinuity and reset the timer. Default is 2 seconds.
+@item speed
+Speed factor for processing. The value must be a float larger than zero.
+Values larger than 1.0 will result in faster than realtime processing,
+smaller will slow processing down. The @var{limit} is automatically adapted
+accordingly. Default is 1.0.
+
+A processing speed faster than what is possible without these filters cannot
+be achieved.
@end table
@anchor{select}
Default value is @samp{sqrt}.
+@item fscale
+Specify frequency scale.
+
+It accepts the following values:
+@table @samp
+@item lin
+linear
+@item log
+logarithmic
+@end table
+
+Default value is @samp{lin}.
+
@item saturation
Set saturation modifier for displayed colors. Negative values provide
alternative color scheme. @code{0} is no saturation at all.
@end table
Default value is @samp{log}.
+@item fscale
+Specify frequency scale.
+
+It accepts the following values:
+@table @samp
+@item lin
+linear
+@item log
+logarithmic
+@end table
+
+Default value is @samp{lin}.
+
@item saturation
Set saturation modifier for displayed colors. Negative values provide
alternative color scheme. @code{0} is no saturation at all.
@end table
Default is linear.
+
+@item draw
+Set the draw mode.
+
+Available values are:
+@table @samp
+@item scale
+Scale pixel values for each drawn sample.
+
+@item full
+Draw every sample directly.
+@end table
+
+Default value is @code{scale}.
@end table
@subsection Examples
projects / ffmpeg / blobdiff