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doc/filters.texi: fix time duration references

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Make time duration references consistent, using @ref links, and
eliminate incorrect syntax [-]HH[:MM[:SS[.m...]]].

Signed-off-by: Stefano Sabatini <stefasab@gmail.com>
This commit is contained in:
Mark Harris 2014-09-04 13:19:44 -07:00 committed by Stefano Sabatini
parent 6f0fc1a96b
commit ef16d12606
1 changed files with 29 additions and 39 deletions
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doc/filters.texi
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@ -517,27 +517,21 @@ volume as the input audio, at the end of the fade-out transition
the output audio will be silence. Default is 44100.
@item start_time, st
Specify time for starting to apply the fade effect. Default is 0.
The accepted syntax is:
@example
[-]HH[:MM[:SS[.m...]]]
[-]S+[.m...]
@end example
See also the function @code{av_parse_time()}.
If set this option is used instead of @var{start_sample} one.
Specify the start time of the fade effect. Default is 0.
The value must be specified as a time duration; see
@ref{time duration syntax,,the Time duration section in the ffmpeg-utils(1) manual,ffmpeg-utils}
for the accepted syntax.
If set this option is used instead of @var{start_sample}.
@item duration, d
Specify the duration for which the fade effect has to last. Default is 0.
The accepted syntax is:
@example
[-]HH[:MM[:SS[.m...]]]
[-]S+[.m...]
@end example
See also the function @code{av_parse_time()}.
Specify the duration of the fade effect. See
@ref{time duration syntax,,the Time duration section in the ffmpeg-utils(1) manual,ffmpeg-utils}
for the accepted syntax.
At the end of the fade-in effect the output audio will have the same
volume as the input audio, at the end of the fade-out transition
the output audio will be silence.
If set this option is used instead of @var{nb_samples} one.
By default the duration is determined by @var{nb_samples}.
If set this option is used instead of @var{nb_samples}.
@item curve
Set curve for fade transition.
@ -1120,9 +1114,9 @@ The number of the first sample that should be output.
The number of the first sample that should be dropped.
@end table
@option{start}, @option{end}, @option{duration} are expressed as time
duration specifications, check the "Time duration" section in the
ffmpeg-utils manual.
@option{start}, @option{end}, and @option{duration} are expressed as time
duration specifications; see
@ref{time duration syntax,,the Time duration section in the ffmpeg-utils(1) manual,ffmpeg-utils}.
Note that the first two sets of the start/end options and the @option{duration}
option look at the frame timestamp, while the _sample options simply count the
@ -1637,9 +1631,9 @@ Set the number of samples per channel per each output frame, default
is 1024. Only used if plugin have zero inputs.
@item duration, d
Set the minimum duration of the sourced audio. See the function
@code{av_parse_time()} for the accepted format, also check the "Time duration"
section in the ffmpeg-utils manual.
Set the minimum duration of the sourced audio. See
@ref{time duration syntax,,the Time duration section in the ffmpeg-utils(1) manual,ffmpeg-utils}
for the accepted syntax.
Note that the resulting duration may be greater than the specified duration,
as the generated audio is always cut at the end of a complete frame.
If not specified, or the expressed duration is negative, the audio is
@ -2189,8 +2183,9 @@ Set the channel layout. The number of channels in the specified layout
must be equal to the number of specified expressions.
@item duration, d
Set the minimum duration of the sourced audio. See the function
@code{av_parse_time()} for the accepted format.
Set the minimum duration of the sourced audio. See
@ref{time duration syntax,,the Time duration section in the ffmpeg-utils(1) manual,ffmpeg-utils}
for the accepted syntax.
Note that the resulting duration may be greater than the specified
duration, as the generated audio is always cut at the end of a
complete frame.
@ -8546,9 +8541,10 @@ The number of the first frame that should be passed to the output.
The number of the first frame that should be dropped.
@end table
@option{start}, @option{end}, @option{duration} are expressed as time
duration specifications, check the "Time duration" section in the
ffmpeg-utils manual.
@option{start}, @option{end}, and @option{duration} are expressed as time
duration specifications; see
@ref{time duration syntax,,the Time duration section in the ffmpeg-utils(1) manual,ffmpeg-utils}
for the accepted syntax.
Note that the first two sets of the start/end options and the @option{duration}
option look at the frame timestamp, while the _frame variants simply count the
@ -9459,12 +9455,9 @@ number or a valid video frame rate abbreviation. The default value is
"25".
@item duration, d
Set the video duration of the sourced video. The accepted syntax is:
@example
[-]HH:MM:SS[.m...]
[-]S+[.m...]
@end example
See also the function @code{av_parse_time()}.
Set the duration of the sourced video. See
@ref{time duration syntax,,the Time duration section in the ffmpeg-utils(1) manual,ffmpeg-utils}
for the accepted syntax.
If not specified, or the expressed duration is negative, the video is
supposed to be generated forever.
@ -9726,12 +9719,9 @@ number or a valid video frame rate abbreviation. The default value is
Set the sample aspect ratio of the sourced video.
@item duration, d
Set the video duration of the sourced video. The accepted syntax is:
@example
[-]HH[:MM[:SS[.m...]]]
[-]S+[.m...]
@end example
Also see the the @code{av_parse_time()} function.
Set the duration of the sourced video. See
@ref{time duration syntax,,the Time duration section in the ffmpeg-utils(1) manual,ffmpeg-utils}
for the accepted syntax.
If not specified, or the expressed duration is negative, the video is
supposed to be generated forever.