media

Documentation

Overview

Package media provides means for querying information about audio and video data.

Index

• Constants
• func GetMPEGAudioDuration(r readerutil.SizeReaderAt) (time.Duration, error)
• func HasID3v1Tag(r readerutil.SizeReaderAt) (bool, error)

Constants

const ID3v1TagLength = 128

ID3v1TagLength is the length of an MP3 ID3v1 tag in bytes.

Functions

func GetMPEGAudioDuration

func GetMPEGAudioDuration(r readerutil.SizeReaderAt) (time.Duration, error)

GetMPEGAudioDuration reads the first frame in r and returns the audio length with millisecond precision. Format details are at http://www.codeproject.com/Articles/8295/MPEG-Audio-Frame-Header.

func HasID3v1Tag

func HasID3v1Tag(r readerutil.SizeReaderAt) (bool, error)

HasID3v1Tag returns true if an ID3v1 tag is present at the end of r.