[webvtt] Need to remove portions in the webvtt specification that shouldn't be implemented

guohuideng has just created a new issue for https://github.com/w3c/webvtt:

== Need to remove portions in the webvtt specification that shouldn't be implemented ==
There are lots of content that are deployed already. Changing the way the subtitle is displayed can break deployed content.

The below is an example that such change was implemented and later had to be reverted because it breaks deployed content

https://bugs.chromium.org/p/chromium/issues/detail?id=633690

CL to webvtt renderering engine should only change the display if there is a problem.

Therefore, I suggest the following edits to the specification.

1. in session  7.2.10, under clause "If cue’s WebVTT cue snap-to-lines flag is false", step 2 should be removed. (this is not implemented)

2. specify that "lineAlign", "positionAlign" should be ignored. (then issue 633690 can be closed)

related discussion is also in https://bugs.chromium.org/p/chromium/issues/detail?id=314037#c11
 

Please view or discuss this issue at https://github.com/w3c/webvtt/issues/440 using your GitHub account

Received on Wednesday, 25 April 2018 16:34:29 UTC