#9037: Add option to provide loudness information by way of a loudness box
('ludt')
-------------------------------------+-------------------------------------
Reporter: gordon | Type: defect
Status: new | Priority: normal
Component: | Version:
undetermined | unspecified
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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HLS calls for a loudness box:
{{{
2.19. In fMP4 files, you SHOULD provide loudness information by way of a
loudness box ('ludt'). When present, the loudness box takes precedence
over any loudness information in the audio stream.
}}}
Ref
https://developer.apple.com/documentation/http_live_streaming/hls_authoring_specification_for_apple_devices
FFmpeg can be used to normalize and provide this data
(https://github.com/slhck/ffmpeg-normalize)
It would be helpful if loudness metadata could be provided on the command
line and then written to the 'ludt' loudness box when using the dash and
hls output formats
--
Ticket URL: <https://trac.ffmpeg.org/ticket/9037>
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