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Accessibility/Video a11y Study08: Difference between revisions
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Accessibility/Video a11y Study08 (view source)
Revision as of 08:08, 5 February 2009
, 5 February 2009removed academic statement
(extended section 6 with further examples) |
(removed academic statement) |
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As is the case with non-text accessibility data, time-aligned text can also be encoded into media files. The advantage is that the text representation of the video is actually part of the video file and thus this meta data doesn't get lost when sharing the files further. Also, synchronisation between the media data and the text codecs is a given. | As is the case with non-text accessibility data, time-aligned text can also be encoded into media files. The advantage is that the text representation of the video is actually part of the video file and thus this meta data doesn't get lost when sharing the files further. Also, synchronisation between the media data and the text codecs is a given. | ||
Ogg, QuickTime, Flash, mpeg4, and 3gpp are containers that are typically used to encapsulate such extra tracks with the original audio-visual file. All of these are capable of encapsulating 3GPP TimedText, which is a subpart of DFXP | Ogg, QuickTime, Flash, mpeg4, and 3gpp are containers that are typically used to encapsulate such extra tracks with the original audio-visual file. All of these are capable of encapsulating 3GPP TimedText, which is a subpart of DFXP. | ||
Ogg currently supports CMML and Kate as text codecs. | Ogg currently supports CMML and Kate as text codecs. | ||
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'''Recommendation 8:''' One aim must be to handle in-line text codecs in the same way as out-of-band time-aligned text files once they hit the Web browser. In analogy to recommendation 3, this will also require a mapping to HTML (and CSS) for Ogg-encapsulated text codecs. | '''Recommendation 8:''' One aim must be to handle in-line text codecs in the same way as out-of-band time-aligned text files once they hit the Web browser. In analogy to recommendation 3, this will also require a mapping to HTML (and CSS) for Ogg-encapsulated text codecs. | ||
=== 6. Content Selection and Adaptation for Time-aligned Text Codecs === | === 6. Content Selection and Adaptation for Time-aligned Text Codecs === | ||