NAME
Video::FFmpeg::AVFormat - Retrieve video properties using libavformat such as: height width codec fps
SYNOPSIS
use Video::FFmpeg;
use Switch;
my $info = Video::FFmpeg::AVFormat->new($ARGV[0]);
print "Duration: ",$info->duration,"\n";
my @video = $info->video;
print "num video streams: ",$#video+1,"\n";
my @audio = $info->audio;
print "num audio streams: ",$#audio+1,"\n";
my @sub = $info->subtitle;
print "num sub streams: ",$#sub+1,"\n";
my @streams = $info->streams;
for my $id (0 .. $#streams){
my $stream = $streams[$id];
print $stream->codec_type,"stream $id\n";
print "\ttype: ",$stream->codec_type,"\n";
print "\tcodec: ",$stream->codec,"\n";
print "\tlanguage: ",$stream->lang,"\n";
switch($stream->codec_type){
case "video" {
print "\tfps: ",$stream->fps,"\n";
print "\tDAR: ",$stream->display_aspect,"\n";
}
case "audio" {
print "\tsample rate: ",$stream->sample_rate,"hz\n";
print "\taudio language: ",$stream->lang,"\n";
}
case "subtitle" {
print "\tsub codec: ",$stream->codec,"\n";
print "\tsub language: ",$stream->lang,"\n";
}
}
};METHODS
The Video::FFmpeg::AVFormat class
Video::FFmpeg::AVFormat->new($file)
AVFormat Constructor
filename
returns the filename
duration
duration of the stream, in HH:MM:SS.MS.
start_time
position of the first frame of the component, in microseconds
bit_rate
total stream bitrate in bit/s, 0 if not available.
video
if called in scalar context, returns the first Video::FFmpeg::AVStream::Video object. if called in list context, it returns all Video::FFmpeg::AVStream::Video objects
audio
if called in scalar context, returns the first Video::FFmpeg::AVStream::Audio object. if called in list context, it returns all Video::FFmpeg::AVStream::Audio objects
subtitles
if called in scalar context, returns the first Video::FFmpeg::AVStream::Subtitle object. if called in list context, it returns all Video::FFmpeg::AVStream::Subtitle objects
streams
returns a list of all Video::FFmpeg::AVStream objects.
The Video::FFmpeg::AVStream class
codec
name of the codec
codec_type
returns one of "audio", "video", "subtitle", "data", "attachment", "data", or "unknown"
lang
returns the stream's language
The Video::FFmpeg::AVStream::Audio class
bit_rate
the average bitrate in bit/s
sample_rate
samples per second (hz)
channels
number of audio channels
The Video::FFmpeg::AVStream::Video class
width
picture width
height
picture height
fps
frames per second, 0 if not available.
display_aspect
aspect ratio of the picture in "W:H" format
pixel_aspect
aspect ratio of the pixels in "W:H" format, or undef if not defined;
DESCRIPTION
Video::FFmpeg is a factory class for working with video files. Video::FFmpeg utilises FFmpeg's libavformat, and provides a basic interface.
EXPORT
None by default.
SEE ALSO
- Video::FFmpeg
- Video::FFmpeg::AVFormat
- Video::FFmpeg::AVStream
- Video::FFmpeg::AVStream::Audio
- Video::FFmpeg::AVStream::Video
- Video::FFmpeg::AVStream::Subtitle
- html://www.seattlenetworks.com/perl/FFmpeg
TODO
AUTHOR
Max Vohra, <max@seattlenetworks.com> html://www.seattlenetworks.com/
COPYRIGHT AND LICENSE
Copyright (C) 2009 by Max Vohra
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.10.0 or, at your option, any later version of Perl 5 you may have available.