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Urs FleischandGitHub
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Ogg::File::readPages() read pages from all logical bitstreams and indexed their packets into one global list. In a multiplexed file the Theora and Vorbis packets got interleaved, so packet 0 was a Theora header rather than the expected Vorbis type-3 comment header. Before reading packets, the Vorbis reader now selects the Vorbis logical bitstream (the one whose first packet is the Vorbis identification header), so it reads the correct stream regardless of position. Packet parsing is scoped to the selected bitstream, so packets from other codecs in the same file are ignored. tests/data/multiplex.ogg is generated using ffmpeg -hide_banner -y \ -f lavfi -i "color=c=navy:s=500x500:r=1:d=2" \ -f lavfi -i "sine=frequency=440:sample_rate=48000:duration=2" \ -map 0:v -map 1:a \ -c:v libtheora -q:v 3 \ -c:a libvorbis -ac 2 -q:a 2 \ -flags +bitexact -fflags +bitexact \ -metadata:s:a:0 TITLE="Paper Lights" \ -metadata:s:a:0 encoder= -metadata:s:v:0 encoder= \ -f ogg tests/data/multiplex.ogg
TagLib
TagLib Audio Metadata Library
TagLib is a library for reading and editing the metadata of several popular audio formats. Currently, it supports various metadata containers such as ID3v1, ID3v2 and Vorbis comments for MP3, MP4, AAC, Ogg, Opus, FLAC, Speex, APE, MPC, WavPack, WAV, AIFF, TrueAudio, Matroska, WebM, ASF, WMA, DSF, DFF and tracker (MOD, XM, S3M, IT) files.
TagLib is distributed under the GNU Lesser General Public License (LGPL) and Mozilla Public License (MPL). Essentially that means that it may be used in proprietary applications, but if changes are made to TagLib they must be contributed back to the project. Please review the licenses if you are considering using TagLib in your project.