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doc/muxers/image2: apply misc consistency fixes

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Stefano Sabatini 2024-03-29 13:38:50 +01:00
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doc/muxers.texi
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@ -2604,39 +2604,37 @@ specify the name of the '.Y' file. The muxer will automatically open the
'.U' and '.V' files as required.
@subsection Options
@table @option
@item frame_pts
If set to 1, expand the filename with pts from pkt->pts.
@item frame_pts @var{bool}
If set to 1, expand the filename with the packet PTS (presentation time stamp).
Default value is 0.
@item start_number
@item start_number @var{count}
Start the sequence from the specified number. Default value is 1.
@item update
@item update @var{bool}
If set to 1, the filename will always be interpreted as just a
filename, not a pattern, and the corresponding file will be continuously
overwritten with new images. Default value is 0.
@item strftime
@item strftime @var{bool}
If set to 1, expand the filename with date and time information from
@code{strftime()}. Default value is 0.
@item atomic_writing
@item atomic_writing @var{bool}
Write output to a temporary file, which is renamed to target filename once
writing is completed. Default is disabled.
@item protocol_opts @var{options_list}
Set protocol options as a :-separated list of key=value parameters. Values
containing the @code{:} special character must be escaped.
@end table
@subsection Examples
The following example shows how to use @command{ffmpeg} for creating a
sequence of files @file{img-001.jpeg}, @file{img-002.jpeg}, ...,
taking one image every second from the input video:
@itemize
@item
Use @command{ffmpeg} for creating a sequence of files @file{img-001.jpeg},
@file{img-002.jpeg}, ..., taking one image every second from the input video:
@example
ffmpeg -i in.avi -vsync cfr -r 1 -f image2 'img-%03d.jpeg'
@end example
@ -2656,27 +2654,29 @@ Note also that the pattern must not necessarily contain "%d" or
ffmpeg -i in.avi -f image2 -frames:v 1 img.jpeg
@end example
@item
The @option{strftime} option allows you to expand the filename with
date and time information. Check the documentation of
the @code{strftime()} function for the syntax.
For example to generate image files from the @code{strftime()}
"%Y-%m-%d_%H-%M-%S" pattern, the following @command{ffmpeg} command
can be used:
To generate image files from the @code{strftime()} "%Y-%m-%d_%H-%M-%S" pattern,
the following @command{ffmpeg} command can be used:
@example
ffmpeg -f v4l2 -r 1 -i /dev/video0 -f image2 -strftime 1 "%Y-%m-%d_%H-%M-%S.jpg"
@end example
You can set the file name with current frame's PTS:
@item
Set the file name with current frame's PTS:
@example
ffmpeg -f v4l2 -r 1 -i /dev/video0 -copyts -f image2 -frame_pts true %d.jpg
@end example
A more complex example is to publish contents of your desktop directly to a
WebDAV server every second:
@item
Publish contents of your desktop directly to a WebDAV server every second:
@example
ffmpeg -f x11grab -framerate 1 -i :0.0 -q:v 6 -update 1 -protocol_opts method=PUT http://example.com/desktop.jpg
@end example
@end itemize
@section matroska