vcut - Shorter alias for cut-video-by-duration
This document describes version 0.012 of vcut (from Perl distribution App-FfmpegUtils), released on 2022-09-22.
vcut [--copy|--no-copy|--nocopy] [--debug|--log-level=level|--quiet|--trace|--verbose] [--dry-run|-n] [--duration=any|--duration-json=json|-d=any] [--end=any|--end-json=json|-e=any] [(--file=filename)+|--files-json=json] [--format=name|--json] [--(no)naked-res] [--page-result[=program]|--view-result[=program]] [--start=any|--start-json=json|-s=any] -- <file> ...
See examples in the "EXAMPLES" section.
This utility uses ffmpeg (particularly the -t and -ss) option to get a portion (time range) of a video.
-t
-ss
Compared to using ffmpeg directly, this wrapper offers convenience of more flexibility in specifying times and duration (e.g. '15s' as well as '00:10' as well as 'PT1M30S'), specifying only 'end' and 'duration', handling multiple files, automatically choosing output filename, and tab completion.
ffmpeg
* marks required options.
*
Whether to use the "copy" codec (fast but produces inaccurate timings).
See --duration.
--duration
See --end.
--end
Can also be specified as the 1st command-line argument and onwards.
Can be specified multiple times.
See --file.
--file
See --start.
--start
Shortcut for --log-level=debug.
Set log level.
By default, these log levels are available (in order of increasing level of importance, from least important to most): trace, debug, info, warn/warning, error, fatal. By default, the level is usually set to warn, which means that log statements with level info and less important levels will not be shown. To increase verbosity, choose info, debug, or trace.
trace
debug
info
warn
warning
error
fatal
For more details on log level and logging, as well as how new logging levels can be defined or existing ones modified, see Log::ger.
Shortcut for --log-level=error.
Shortcut for --log-level=trace.
Shortcut for --log-level=info.
Choose output format, e.g. json, text.
Default value:
undef
Output can be displayed in multiple formats, and a suitable default format is chosen depending on the application and/or whether output destination is interactive terminal (i.e. whether output is piped). This option specifically chooses an output format.
Set output format to json.
When outputing as JSON, strip result envelope.
0
By default, when outputing as JSON, the full enveloped result is returned, e.g.:
[200,"OK",[1,2,3],{"func.extra"=>4}]
The reason is so you can get the status (1st element), status message (2nd element) as well as result metadata/extra result (4th element) instead of just the result (3rd element). However, sometimes you want just the result, e.g. when you want to pipe the result for more post-processing. In this case you can use --naked-res so you just get:
--naked-res
[1,2,3]
Filter output through a pager.
This option will pipe the output to a specified pager program. If pager program is not specified, a suitable default e.g. less is chosen.
less
View output using a viewer.
This option will first save the output to a temporary file, then open a viewer program to view the temporary file. If a viewer program is not chosen, a suitable default, e.g. the browser, is chosen.
Run in simulation mode (also via DRY_RUN=1).
Display help message and exit.
Display program's version and exit.
This script has shell tab completion capability with support for several shells.
To activate bash completion for this script, put:
complete -C vcut vcut
in your bash startup (e.g. ~/.bashrc). Your next shell session will then recognize tab completion for the command. Or, you can also directly execute the line above in your shell to activate immediately.
It is recommended, however, that you install modules using cpanm-shcompgen which can activate shell completion for scripts immediately.
To activate tcsh completion for this script, put:
complete vcut 'p/*/`vcut`/'
in your tcsh startup (e.g. ~/.tcshrc). Your next shell session will then recognize tab completion for the command. Or, you can also directly execute the line above in your shell to activate immediately.
It is also recommended to install shcompgen (see above).
For fish and zsh, install shcompgen as described above.
% vcut 100s.mp4 -s 40s
% vcut 100s.mp4 50s.mp4 -d 30%
% vcut 100s.mp4 -e 00:01:03
% vcut 100s.mp4 -s 00:00:50 -e 00:01:03
% vcut 100s.mp4 -s 50 -d 13
% vcut 100s.mp4 -e PT63S -d 13s
Please visit the project's homepage at https://metacpan.org/release/App-FfmpegUtils.
Source repository is at https://github.com/perlancar/perl-App-FfmpegUtils.
perlancar <perlancar@cpan.org>
To contribute, you can send patches by email/via RT, or send pull requests on GitHub.
Most of the time, you don't need to build the distribution yourself. You can simply modify the code, then test via:
% prove -l
If you want to build the distribution (e.g. to try to install it locally on your system), you can install Dist::Zilla, Dist::Zilla::PluginBundle::Author::PERLANCAR, Pod::Weaver::PluginBundle::Author::PERLANCAR, and sometimes one or two other Dist::Zilla- and/or Pod::Weaver plugins. Any additional steps required beyond that are considered a bug and can be reported to me.
This software is copyright (c) 2022, 2020 by perlancar <perlancar@cpan.org>.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.
Please report any bugs or feature requests on the bugtracker website https://rt.cpan.org/Public/Dist/Display.html?Name=App-FfmpegUtils
When submitting a bug or request, please include a test-file or a patch to an existing test-file that illustrates the bug or desired feature.
To install App::FfmpegUtils, copy and paste the appropriate command in to your terminal.
cpanm
cpanm App::FfmpegUtils
CPAN shell
perl -MCPAN -e shell install App::FfmpegUtils
For more information on module installation, please visit the detailed CPAN module installation guide.