2.1.32 [W3C-HTML51] Section 4.7.14.11.2 Sourcing in-band text tracks
V0094: MPEG-2 support is limited to HLS and ID3 timed metadata
The specification states:
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... Sourcing in-band text tracks ... When a media resource contains data that the user agent recognises and supports as being equivalent to a text track, the user agent runs the steps to expose a media-resource-specific text track with the relevant data, as follows. ... 4. If the new text track's kind is metadata, then set the text track in-band metadata track dispatch type as follows, based on the type of the media resource: ... If the media resource is an MPEG-2 file Let stream type be the value of the "stream_type" field describing the text track's type in the file's program map section, interpreted as an 8-bit unsigned integer. ...
EdgeHTML Mode
MPEG-2 support is limited to HLS only. MPEG-2 metadata support is limited to ID3 timed metadata.
V0091: WebM files are not supported
The specification states:
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... Sourcing in-band text tracks ... When a media resource contains data that the user agent recognises and supports as being equivalent to a text track, the user agent runs the steps to expose a media-resource-specific text track with the relevant data, as follows. ... 4. If the new text track's kind is metadata, then set the text track in-band metadata track dispatch type as follows, based on the type of the media resource: ... If the media resource is a WebM file The text track in-band metadata track dispatch type must be set to the value of the CodecID element.
EdgeHTML Mode
WebM files are not supported.
V0092: MPEG-4 metadata is not supported
The specification states:
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... Sourcing in-band text tracks ... When a media resource contains data that the user agent recognises and supports as being equivalent to a text track, the user agent runs the steps to expose a media-resource-specific text track with the relevant data, as follows. ... 4. If the new text track's kind is metadata, then set the text track in-band metadata track dispatch type as follows, based on the type of the media resource: ... If the media resource is an MPEG-4 file Let the first stsd box of the first stbl box of the first minf box of the first mdia box of the text track's trak box in the first moov box of the file be the stsd box, if any. ...
EdgeHTML Mode
MPEG-4 metadata is not supported.
V0093: DASH metadata is not supported
The specification states:
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... Sourcing in-band text tracks ... When a media resource contains data that the user agent recognises and supports as being equivalent to a text track, the user agent runs the steps to expose a media-resource-specific text track with the relevant data, as follows. ... 4. If the new text track's kind is metadata, then set the text track in-band metadata track dispatch type as follows, based on the type of the media resource: ... If the media resource is a DASH media resource The text track in-band metadata track dispatch type must be set to the concatenation of the "AdaptationSet" element attributes and all child Role descriptors.
EdgeHTML Mode
DASH metadata is not supported.
V0090: Ogg files are not supported
The specification states:
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... Sourcing in-band text tracks ... When a media resource contains data that the user agent recognises and supports as being equivalent to a text track, the user agent runs the steps to expose a media-resource-specific text track with the relevant data, as follows. ... 4. If the new text track's kind is metadata, then set the text track in-band metadata track dispatch type as follows, based on the type of the media resource: If the media resource is an Ogg file The text track in-band metadata track dispatch type must be set to the value of the Role header field.
EdgeHTML Mode
Ogg files are not supported.