Martchus
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| flac | ||
| id3 | ||
| ivf | ||
| matroska | ||
| mp4 | ||
| mpegaudio | ||
| ogg | ||
| opus | ||
| scripts | ||
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| tests | ||
| vorbis | ||
| wav | ||
| .gitignore | ||
| CMakeLists.txt | ||
| LICENSE | ||
| README.md | ||
| abstractattachment.cpp | ||
| abstractattachment.h | ||
| abstractchapter.cpp | ||
| abstractchapter.h | ||
| abstractcontainer.cpp | ||
| abstractcontainer.h | ||
| abstracttrack.cpp | ||
| abstracttrack.h | ||
| aspectratio.cpp | ||
| aspectratio.h | ||
| backuphelper.cpp | ||
| backuphelper.h | ||
| basicfileinfo.cpp | ||
| basicfileinfo.h | ||
| caseinsensitivecomparer.h | ||
| diagnostics.cpp | ||
| diagnostics.h | ||
| exceptions.cpp | ||
| exceptions.h | ||
| fieldbasedtag.h | ||
| genericcontainer.h | ||
| genericfileelement.h | ||
| generictagfield.h | ||
| global.h | ||
| localeawarestring.cpp | ||
| localeawarestring.h | ||
| localehelper.cpp | ||
| localehelper.h | ||
| margin.h | ||
| mediafileinfo.cpp | ||
| mediafileinfo.h | ||
| mediaformat.cpp | ||
| mediaformat.h | ||
| positioninset.h | ||
| progressfeedback.cpp | ||
| progressfeedback.h | ||
| settings.h | ||
| signature.cpp | ||
| signature.h | ||
| size.cpp | ||
| size.h | ||
| tag.cpp | ||
| tag.h | ||
| tagtarget.cpp | ||
| tagtarget.h | ||
| tagtype.h | ||
| tagvalue.cpp | ||
| tagvalue.h | ||
README.md
Tag Parser
C++ library for reading and writing MP4 (iTunes), ID3, Vorbis, Opus, FLAC and Matroska tags.
Supported formats
The tag library can read and write the following tag formats:
- iTunes-style MP4/M4A tags (MP4-DASH is supported)
- ID3v1 and ID3v2 tags
- conversion between ID3v1 and different versions of ID3v2 is possible
- Vorbis, Opus and FLAC comments in Ogg streams
- cover art via "METADATA_BLOCK_PICTURE" is supported
- Vorbis comments and "METADATA_BLOCK_PICTURE" in raw FLAC streams
- Matroska/WebM tags and attachments
File layout options
Tag position
The library allows you to choose whether tags should be placed at the beginning or at the end of an MP4/Matroska file.
Padding
Padding allows adding additional tag information without rewriting the entire file or appending the tag. Usage of padding can be configured:
- minimum/maximum padding: The file is rewritten if the padding would fall below/exceed the specified limits.
- preferred padding: If the file needs to be rewritten the preferred padding is used.
Default value for minimum and maximum padding is zero. Hence the library will almost always have to rewrite the entire file to apply changes. To prevent this, set at least the maximum padding to a higher value.
It is also possible to force rewriting the entire file always.
Taking advantage of padding is currently not supported when dealing with Ogg streams (it is supported when dealing with raw FLAC streams).
Additional features
The library can also display technical information such as the ID, format, language, bitrate, duration, size, timestamps, sampling frequency, FPS and other information of the tracks.
It also allows to inspect and validate the element structure of MP4 and Matroska files.
Text encoding, Unicode support
The library is aware of different text encodings and can convert between different encodings using iconv.
Usage
- For building/installing the library, checkout the build instructions below.
- To use the library with CMake, use its find module (e.g.
find_package(tagparser 10.1.0 REQUIRED)) which provides the imported targettagparseryou can link against. Otherwise, use thepkg-configmoduletagparserto query the required compiler/linker flags. - For a code example that shows how to read and write tag fields in a format-independent way, have
a look at
example.cpp. - The most important class is
TagParser::MediaFileInfoproviding access to everything else. - IO errors are propagated via standard
std::ios_base::failure. - Fatal processing errors are propagated by throwing a class derived from
TagParser::Failure. - All operations which might generate warnings, non-fatal errors, ... take a
TagParser::Diagnosticsobject to store those messages. - All operations which might be aborted or might provide progress feedback take a
TagParser::AbortableProgressFeedbackobject for callbacks and aborting. - Field values are stored using
TagParser::TagValueobjects. Those objects erase the actual type similar toQVariantfrom the Qt framework. The documentation ofTagParser::TagValuecovers how different types and encodings are handled.
Further documentation
For more examples check out the command line interface of Tag Editor.
API documentation can be generated using Doxygen with make tagparser_apidoc.
Bugs, stability
Bugs can be reported on GitHub.
It is recommend to create backups before editing because I can not test whether the library works with all kinds of files. (When forcing rewrite a backup is always created.)
Build instructions
The tagparser library depends on c++utilities and is built in the same way. It also depends on zlib, iso-codes and requires at least CMake 3.19. Tests depend on CppUnit. For checking integrity of testfiles, the OpenSSL crypto library is required.
The location of the JSON file from iso-codes can be specified via the CMake variable LANGUAGE_FILE_ISO_639_2.
For building multiple projects in one go (c++utilities, tagparser and the tag editor), checkout the "Building this straight" instructions.
TODOs
- Support more formats (EXIF, PDF metadata, Theora, ...)
- Support adding cue-sheet to FLAC files
More TODOs are tracked in the issue section at GitHub.
Copyright notice and license
Copyright © 2015-2023 Marius Kittler
All code is licensed under GPL-2-or-later.