Free video info mpeg constants 0.993 software for linux

Video::Info::MPEG is a basic MPEG bitstream attribute parser.

SYNOPSIS

use strict;
use Video::Info::MPEG;

my $video = Video::Info::MPEG->new( -file => $filename );
$video->probe();

print $file->type; ## MPEG

## Audio information
print $file->acodec; ## MPEG Layer 1/2
print $file->acodecraw; ## 80
print $file->achans; ## 1
print $file->arate; ## 128000 (bits/sec)
print $file->astreams ## 1

## Video information
printf "%0.2f", $file->fps ## 29.97
print $file->height ## 240
print $file->width ## 352
print $file->vstreams ## 1
print $file->vcodec ## MPEG1
print $file->vframes ## 529
print $file->vrate ## 1000000 (bits/sec)

The Moving Picture Experts Group (MPEG) is a working group in charge of the development of standards for coded representation of digital audio and video.
MPEG audio and video clips are ubiquitous but using Perl to programmatically collect information about these bitstreams has to date been a kludge at best.

This module parses the raw bitstreams and extracts information from the packet headers. It supports Audio, Video, and System (multiplexed audio and video) packets so it can be used on nearly every MPEG you encounter.

Video::Info::ASF is a Perl module for ASF files for attributes like:

-video codec
-audio codec
-frame height
-frame width
-frame count
and more!

SYNOPSIS

use Video::Info::ASF;

my $video;

$video = Video::Info::ASF->new(-file=>$filename); #like this

$video->vcodec; #video codec
$video->acodec; #audio codec
...

ASF stands for Advanced Systems Format, in case you were wondering. It used to stand for Active Streaming Format, but Microsoft decided to change it. This type of file is primarily used to store audio & video data for local or streaming playback. It can also be embedded with commands (to launch a web browser, for instance), for an "immersive" experience. ASF is similar in structure to RIFF. (See RIFF::Info). The morbidly curious can find out more below in REFERENCES.

Video::Info::Magic can resolve video filetype if possible.

SYNOPSIS

use strict;
use Video::Info::Magic qw(:all);

my $type = divine(/path/to/video.mpg );

print $type; #MPEG system stream data (maybe)

## ... see methods below

EXPORT

various constants related to video file formats. All are prefixed with "VIDEO_".
divine(): Employs /usr/share/magic entries to determine a files type, as well as GUID and other info from Microsoft, mplayer, transcode...

Video::Info::RIFF is a Perl module that can probe DivX and AVI files for attributes like:

-video codec
-audio codec
-frame height
-frame width
-frame count
and more!

SYNOPSIS

use Video::Info::RIFF;

my $video;

$video = Video::Info::RIFF->new(-file=>$filename); #like this
$video = Video::Info::RIFF->new(-file=>$filename,-headersize=>$headersize); #or this

$video->vcodec; #video codec
$video->acodec; #audio codec
...

RIFF stands for Resource Interchange File Format, in case you were wondering. The morbidly curious can find out more below in REFERENCES.

Astro::Constants is a Perl module that contains physical constants for use in Astronomy.

SYNOPSIS

use Astro::Constants::CGS qw(:long);
print "The Schwarzschild radius of the sun is ",
2 * GRAVITATIONAL * SOLAR_MASS / LIGHT_SPEED ** 2,
" centimetresn";
or
use Astro::Constants::MKS qw(:short);
print "The Schwarzschild radius of the sun is ",
2 * $A_G * $A_msun / $A_c ** 2,
" metresn";

This module provides a large number of physical constants which are useful to Astronomers. The module itself is essentially a wrapper around the astroconst package of Jeremy Balin.

It allows you to choose between constants in units of centimetres/grams/seconds with Astro::Constants::CGS and metres/kilograms/seconds with Astro::Constants::MKS. It also allows you to select two different methods of refering to the constants using the import tags :long and :short.

The :short tag refers to the constants in the normal perl variable style, such as $A_G for the gravitational constant and $A_c for the speed of light in a vaccuum. The naming convention for the :short constant is A_ prepended to the symbol character.

The :long tag refers to the constants with longer descriptive names in ALL_CAPS that have been created with the use constant pragma. As in the example, GRAVITATIONAL is the gravitational constant and LIGHT_SPEED is the speed of light. This is a new addition to the Astroconst package and, at present, we are following a naming convention of OBJECT_PROPERTY and SYMBOL_SUBSCRIPT. Opinions on this matter will be listened to and if we decline to agree, you can always change it yourself, as described in "EXTENDING THE DATA SET".

The :long and the :short tags import the same constants. You may choose individual constants and even mix and match (I havent tested this) by importing them in the use statement.

One of the problems with the long constants is that they are not interpolated in double quotish situations because they are really inlined functions.

Etk::Constants is a Perl module with costants to use with Etk.

SYNOPSIS

use Etk::Constants qw/ButtonsOk ButtonsClose/;
#
use Etk::Constants qw/:messagedialog/;
#
use Etk::Constants qw/:all/;

This module contains constants to use while building Etk apps. The constants have numerical values which can be used instead.

Template::Plugin::Java::Constants is a Perl module with constants for the Java Template plugin modules.

SYNOPSIS

use Template::Plugin::Java::Constants qw/:regex/; use Template::Plugin::Java::Constants qw/:boolean/; use Template::Plugin::Java::Constants qw/:all/;

regex

The "regex" tag exports qr// compiled regular expressions SCALAR, PRIMITIVE, STRING and ARRAY, these are for matching Java types. All of these match a whole line, with no extra whitespace, and return the matched java type as $1. They may be used as:

$string =~ /@{[SCALAR]}/; # Ugly but effective and relatively fast.

SCALAR

Any primitive or encapsulated primitive: int, or Integer, or String, etc.

PRIMITIVE

Only primitive types like int, float, double, byte, etc.

STRING

An incarnation of java.lang.String.

ARRAY

A java.util.Vector.

boolean

The boolean tag just exports the constants TRUE as 1 and FALSE as 0.
all

Exports all of the proceeding.