Public bug reported:
mp4tags -X explicit somefile.m4a
Sets the rtng atom to 4, not 1 as it should be. Similarly using mp4info
on a file with the correct rtng of 1 gives:
Content Rating: UNDEFINED(1)
This should obviously be marked as explicit. The confusion can come from
how iTunes displays rtng. Missing the rtng atom or having a value of 0
are treated the same. A value of 2 displays the [clean] graphic next to
the track title in track listing, but not in the player status, Info
Editor dialog, or in the iOS music player.
Any value greater than 2 displays the [explicit] graphic in that same
manner as the [clean] graphic, but only a value of 1 also displays the
red [E] in the player status, the Info Editor dialog, and in the iOS
music player.
Therefore while a value of 4 may display as explicit in some places, it
is not treated as explicit in that same way as a value of 1 is. In fact
any value other than 1 will allow iTunes and iOS to play the track when
Restrict Explicit is enabled.
As such the fact that iTunes displays values greater than 2 as explicit,
and the fact that mp4v2 assumes a value of 4 is explicit, is a bug.
Ubuntu 16.04.1 LTS
mp4v2-utils 2.0.0~dfsg0-4
** Affects: mp4v2 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1613021
Title:
mp4tags sets wrong value and mp4info expects wrong value for explicit
rating
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