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gh-146341: Add new video MIME types to mimetypes.py #146342

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Add new video MIME types to mimetypes.py
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2 changes: 2 additions & 0 deletions Doc/whatsnew/3.16.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -510,6 +510,8 @@ mimetypes
* Valid extensions start with a '.' or are empty for
:meth:`mimetypes.MimeTypes.add_type`.
Undotted extensions now raise a :exc:`ValueError`.
* Add more MIME types.
(Contributed by Charlie Lin in :gh:`146341`.)

shutil
------
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17 changes: 13 additions & 4 deletions Lib/mimetypes.py
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Expand Up @@ -585,10 +585,6 @@ def _default_mime_types():
'.yaml' : 'application/yaml',
'.yml' : 'application/yaml',
'.zip' : 'application/zip',
'.3gp' : 'audio/3gpp',
'.3gpp' : 'audio/3gpp',
'.3g2' : 'audio/3gpp2',
'.3gpp2' : 'audio/3gpp2',
'.aac' : 'audio/aac',
'.adts' : 'audio/aac',
'.loas' : 'audio/aac',
Expand Down Expand Up @@ -681,8 +677,15 @@ def _default_mime_types():
'.sgml' : 'text/x-sgml',
'.vcf' : 'text/x-vcard',
'.xml' : 'text/xml',
'.3gp' : 'video/3gpp',
'.3gpp' : 'video/3gpp',
'.3g2' : 'video/3gpp2',
Comment on lines +680 to +682

@hugovk hugovk Jul 7, 2026

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We already have these earlier in the dict:

        '.3gp'    : 'audio/3gpp',
...
        '.3g2'    : 'audio/3gpp2',

So these new video ones overwrite the audio ones.

Should we change it to the video ones, and remove the audio?

@clin1234 clin1234 Jul 7, 2026

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Well, they're both official MIME types: iana.org/assignments/media-types/audio/3gpp and iana.org/assignments/media-types/video/3gpp. The only major difference as far as I can tell is that the former cannot contain any visual data

@clin1234 clin1234 Jul 7, 2026

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Interestingly, per the official 3GPP TS 26.244 V19.1.0 Specification:

The type "video/3gpp" is valid for all files. It is valid to serve an audio-only file as "video/3gpp".

@clin1234 clin1234 Jul 7, 2026

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And per this RFC: https://www.rfc-editor.org/info/rfc4393/#section-3.2

@clin1234 clin1234 Jul 7, 2026

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So, remove the audio

'.3gpp2' : 'video/3gpp2',
'.m4s' : 'video/iso.segment',
'.lot' : 'video/lottie+json',
'.mkv' : 'video/matroska',
'.mk3d' : 'video/matroska-3d',
'.mj2' : 'video/mj2',
'.mp4' : 'video/mp4',
'.mpeg' : 'video/mpeg',
'.m1v' : 'video/mpeg',
Expand All @@ -692,6 +695,12 @@ def _default_mime_types():
'.ogv' : 'video/ogg',
'.mov' : 'video/quicktime',
'.qt' : 'video/quicktime',
'.pyv' : 'video/vnd.ms-playready.media.pyv',
'.bik' : 'video/vnd.radgamettools.bink',
'.bk2' : 'video/vnd.radgamettools.bink',
'.sswf' : 'video/vnd.sealed.swf',
'.ssw' : 'video/vnd.sealed.swf',
'.yt' : 'video/vnd.youtube.yt',
'.webm' : 'video/webm',
'.avi' : 'video/vnd.avi',
'.m4v' : 'video/x-m4v',
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13 changes: 13 additions & 0 deletions Misc/NEWS.d/next/Library/2026-03-23-20-14-57.gh-issue-146341.JSTJlL.rst
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@@ -0,0 +1,13 @@
Add the following MIME types corresponding to file extensions:

``.3gp`` for ``video/3gpp``
``.3g2`` for ``video/3gpp2``
``.m4s`` for ``video/iso.segment``
``.lot`` for ``video/lottie+json``
``.mj2`` for ``video/mj2``
``.pyv`` for ``video/vnd.ms-playready.media.pyv``
``.blk`` and ``.bk2`` for ``video/vnd.radgamettools.bink``
``.sswf`` and ``.ssw`` for ``video/vnd.sealed.swf``
``.yt`` for ``video/vnd.youtube.yt``

(Contributed by Charlie Lin in :gh:`146342`.)
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