The actual duration syntax with optional hours can be found in the
ffmpeg-utils doc, but mention only seconds for filter options because
":" is an option separator (at least on the command line).
---
doc/filters.texi | 36 ++++++++----------------------------
1 file changed, 8 insertions(+), 28 deletions(-)
diff --git a/doc/filters.texi b/doc/filters.texi
index 4ae5b4f..afac010 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -517,27 +517,17 @@ 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, in seconds.
+By default the start is determined by @var{start_sample}.
+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, in seconds.
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.
@@ -9459,12 +9449,7 @@ 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, in seconds.
If not specified, or the expressed duration is negative, the video is
supposed to be generated forever.
@@ -9726,12 +9711,7 @@ 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, in seconds.
If not specified, or the expressed duration is negative, the video is
supposed to be generated forever.
--
2.1.0
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