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https://issues.apache.org/jira/browse/TIKA-4838?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dominik Schmidt updated TIKA-4838:
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Description:
A video file's audio track codec is currently not exposed. TikaMp4SoundHandler
reads the audio sample description's format fourcc but only uses it to detect
protected streams (drms/enca → audio:has-drm).
Add an audio:format property carrying that four-character codec identifier
(e.g. mp4a for AAC, alac, ac-3), set from the sample entry. It comes from the
audio track, so it also populates for video/* files, where
xmpDM:audioCompressor does not fire (it only covers audio-typed files and
carries the container major brand, not the per-track codec). For protected
streams the original codec is recovered from the nested frma box.
Rounds out the per-track audio metadata added in TIKA-4779 (audio:bitrate) and
TIKA-4800 (audio:channels, audio:bits-per-sample), and pairs with the
video-track metadata from TIKA-4800/TIKA-4802.
was:
The MP4/QuickTime parser already reads the audio sample description's format
fourcc in TikaMp4SoundHandler, but only uses it to detect protected streams
(drms/enca → audio:has-drm). The codec itself is not exposed.
Add an audio:format property carrying the four-character codec identifier from
the sample entry (e.g. mp4a for AAC, alac, ac-3). For protected streams,
resolve the original codec from the nested frma (original format) box.
xmpDM:audioCompressor exists but MP4Parser only sets it for audio-typed files
and to the container major brand, not the per-track codec, so it does not cover
video/* files or give the sample-entry fourcc.
Follows TIKA-4779 (audio:bitrate), TIKA-4800 (frame rate / channels / sample
size) and TIKA-4802 (video:bitrate).
> Expose the MP4 audio track codec (audio:format)
> -----------------------------------------------
>
> Key: TIKA-4838
> URL: https://issues.apache.org/jira/browse/TIKA-4838
> Project: Tika
> Issue Type: New Feature
> Reporter: Dominik Schmidt
> Priority: Major
>
> A video file's audio track codec is currently not exposed.
> TikaMp4SoundHandler reads the audio sample description's format fourcc but
> only uses it to detect protected streams (drms/enca → audio:has-drm).
> Add an audio:format property carrying that four-character codec identifier
> (e.g. mp4a for AAC, alac, ac-3), set from the sample entry. It comes from the
> audio track, so it also populates for video/* files, where
> xmpDM:audioCompressor does not fire (it only covers audio-typed files and
> carries the container major brand, not the per-track codec). For protected
> streams the original codec is recovered from the nested frma box.
> Rounds out the per-track audio metadata added in TIKA-4779 (audio:bitrate)
> and TIKA-4800 (audio:channels, audio:bits-per-sample), and pairs with the
> video-track metadata from TIKA-4800/TIKA-4802.
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