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Accessibility/Captioning Work Plan: Difference between revisions
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Accessibility/Captioning Work Plan (view source)
Revision as of 14:42, 4 August 2008
, 4 August 2008→Background: Fix one blah
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In theory, given a muxing rule, you can put any video codec and any captiong format in any container, but in practice, video codec tends to have a conventional native container, so the video codec dictates the container and then different containers have different conventional timed text formats and the timed text formats might not have muxing rules for non-native containers. | In theory, given a muxing rule, you can put any video codec and any captiong format in any container, but in practice, video codec tends to have a conventional native container, so the video codec dictates the container and then different containers have different conventional timed text formats and the timed text formats might not have muxing rules for non-native containers. | ||
Example: Ogg and MP4 are containers, whereas Theora and H.264 are codecs. Gstreamer and QuickTime are both timed media frameworks, which each can play various container/codec combinations. Ogg, Theora and CMML are a natural match. MP4, H.264 and 3GPP TT are a natural match. While technically, you *could* define a way to put 3GPP TT inside Ogg, the disadvantage to doing this is | Example: Ogg and MP4 are containers, whereas Theora and H.264 are codecs. Gstreamer and QuickTime are both timed media frameworks, which each can play various container/codec combinations. Ogg, Theora and CMML are a natural match. MP4, H.264 and 3GPP TT are a natural match. While technically, you *could* define a way to put 3GPP TT inside Ogg, the disadvantage to doing this is that the result might not interoperate well with authoring tools and other player due to the combination being unusual. | ||
{| summary="Map of video technology for the web" border="1" | {| summary="Map of video technology for the web" border="1" | ||