mirror of https://git.ffmpeg.org/ffmpeg.git
doc/filters: move *setpts and *settb filters to the multimedia filters section
Since audio and video filters are explained together and share most code, the multimedia filters section seems more fitting.
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Stefano Sabatini
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0043db2967
200
doc/filters.texi
200
doc/filters.texi
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@ -3179,106 +3179,6 @@ Mark the frame as top-field-first.
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Mark the frame as progressive.
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@end table
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@section asetpts, setpts
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Change the PTS (presentation timestamp) of the input frames.
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@code{asetpts} works on audio frames, @code{setpts} on video frames.
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Accept in input an expression evaluated through the eval API, which
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can contain the following constants:
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@table @option
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@item PTS
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the presentation timestamp in input
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@item N
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the count of the input frame, starting from 0.
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@item NB_CONSUMED_SAMPLES
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the number of consumed samples, not including the current frame (only
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audio)
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@item NB_SAMPLES
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the number of samples in the current frame (only audio)
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@item SAMPLE_RATE
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audio sample rate
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@item STARTPTS
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the PTS of the first video frame
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@item INTERLACED
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tell if the current frame is interlaced
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@item TB
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the time base
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@item POS
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original position in the file of the frame, or undefined if undefined
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for the current frame
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@item PREV_INPTS
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previous input PTS
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@item PREV_OUTPTS
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previous output PTS
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@end table
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Some examples follow:
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@example
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# start counting PTS from zero
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setpts=PTS-STARTPTS
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# fast motion
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setpts=0.5*PTS
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# slow motion
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setpts=2.0*PTS
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# fixed rate 25 fps
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setpts=N/(25*TB)
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# fixed rate 25 fps with some jitter
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setpts='1/(25*TB) * (N + 0.05 * sin(N*2*PI/25))'
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# apply an offset of 10 seconds to the input PTS
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setpts=PTS+10/TB
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@end example
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@section settb, asettb
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Set the timebase to use for the output frames timestamps.
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It is mainly useful for testing timebase configuration.
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It accepts in input an arithmetic expression representing a rational.
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The expression can contain the constants "AVTB" (the
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default timebase), "intb" (the input timebase) and "sr" (the sample rate,
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audio only).
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The default value for the input is "intb".
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Follow some examples.
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@example
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# set the timebase to 1/25
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settb=1/25
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# set the timebase to 1/10
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settb=0.1
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#set the timebase to 1001/1000
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settb=1+0.001
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#set the timebase to 2*intb
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settb=2*intb
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#set the default timebase value
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settb=AVTB
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@end example
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@section showinfo
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Show a line containing various information for each input video frame.
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@ -4200,6 +4100,106 @@ tools.
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Below is a description of the currently available multimedia filters.
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@section asetpts, setpts
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Change the PTS (presentation timestamp) of the input frames.
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@code{asetpts} works on audio frames, @code{setpts} on video frames.
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Accept in input an expression evaluated through the eval API, which
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can contain the following constants:
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@table @option
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@item PTS
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the presentation timestamp in input
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@item N
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the count of the input frame, starting from 0.
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@item NB_CONSUMED_SAMPLES
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the number of consumed samples, not including the current frame (only
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audio)
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@item NB_SAMPLES
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the number of samples in the current frame (only audio)
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@item SAMPLE_RATE
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audio sample rate
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@item STARTPTS
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the PTS of the first frame
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@item INTERLACED
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tell if the current frame is interlaced
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@item TB
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the time base
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@item POS
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original position in the file of the frame, or undefined if undefined
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for the current frame
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@item PREV_INPTS
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previous input PTS
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@item PREV_OUTPTS
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previous output PTS
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@end table
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Some examples follow:
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@example
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# start counting PTS from zero
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setpts=PTS-STARTPTS
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# fast motion
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setpts=0.5*PTS
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# slow motion
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setpts=2.0*PTS
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# fixed rate 25 fps
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setpts=N/(25*TB)
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# fixed rate 25 fps with some jitter
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setpts='1/(25*TB) * (N + 0.05 * sin(N*2*PI/25))'
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# apply an offset of 10 seconds to the input PTS
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setpts=PTS+10/TB
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@end example
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@section settb, asettb
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Set the timebase to use for the output frames timestamps.
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It is mainly useful for testing timebase configuration.
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It accepts in input an arithmetic expression representing a rational.
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The expression can contain the constants "AVTB" (the
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default timebase), "intb" (the input timebase) and "sr" (the sample rate,
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audio only).
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The default value for the input is "intb".
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Follow some examples.
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@example
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# set the timebase to 1/25
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settb=1/25
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# set the timebase to 1/10
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settb=0.1
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#set the timebase to 1001/1000
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settb=1+0.001
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#set the timebase to 2*intb
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settb=2*intb
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#set the default timebase value
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settb=AVTB
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@end example
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@section concat
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Concatenate audio and video streams, joining them together one after the
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