Tag editor

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A tag editor (or tagger) is a piece of software that supports editing metadata of multimedia file formats, rather than the actual file content. These are mainly taggers for common audio tagging formats like ID3, APE, and Vorbis comments (for example Windows Media Player and iTunes), but can also be taggers for JPEG, PDF and TIFF metadata (for example iPhoto).

A common purpose of tag editors is to correct and sort multimedia files, for example music collections. This often happens in a batch processing mode so that one doesn't have to manually edit every file on its own.

Audio files editing techniques[edit]

Manual[edit]

Most media player programs, such as iTunes or Winamp, allow users to manually edit tag and song file information. They can edit many advanced fields, including composer, release year, etc. Most players can automatically look up CD information from Gracenote — a database that contains track information for millions of CDs.

There are also many programs dedicated to the task of tag editing. These programs provide complex tag editing capabilities, such as batch editing, creating tags from filenames and vice versa, so they are useful when there's a need for editing a large number of files.

Automatic[edit]

Comparing already-existing tag information to online music databases[edit]

One type of tag editor compares the already-existing information in a song file's tag to information from online music databases, such as Gracenote / Discogs / freedb / Zortam Music Internet Database (ZMLIMD) or MusicBrainz. If the already-existing tag information matches song information of a song from an online music database, then the tag information and information about the song (such as song name and album) can be changed according to that song information match.

Acoustic fingerprinting[edit]

Main article: Acoustic fingerprint

An acoustic fingerprint is a unique code generated from an audio waveform. Depending upon the particular algorithm, acoustic fingerprints can be used to automatically categorize or identify an audio sample. Practical uses of acoustic fingerprinting include broadcast monitoring, identification of music and ads being played, peer-to-peer network monitoring, sound effect library management, and video identification.

Hash function[edit]

In hash function, for audio identification, such as finding out whether an MP3 file matches one of a list of known items, one could use a conventional hash function such as MD5, but this would be very sensitive to highly likely perturbations such as time-shifting, CD read errors, different compression algorithms or implementations or changes in volume. Using something like MD5 is useful as a first pass to find exactly-identical files, but another, more advanced algorithm is required to find all items that would nonetheless be interpreted as identical to a human listener.

List of tag editors[edit]

The following is a list of tag editors. Media players generally have tag editing capabilities and are not included.

Audio files[edit]

  • Proprietary software:
    • File Explorer – has limited tag editing capabilities on supported file formats such as MP3 and WMA
    • Jaikoz – Commercial package, available for Windows, Linux and OS X that uses the MusicBrainz database for auto-tagging. Supports embedded album art and auto-lyrics.
    • Mp3tagFreeware for Windows. Supports FLAC, APE, MP3, MPEG-4, MPC, OGG, OptimFROG, TAK, WMA, WavPack.

Image files[edit]

Video files[edit]

References[edit]