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Style restrictions in picture-in-picture mode excludes mirrored video use cases #167

aburnson opened this issue Aug 28, 2019 · 0 comments


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commented Aug 28, 2019

One potential use case for picture-in-picture is to display one's own local video camera outside of the page window. For example, many web-based videoconferencing applications use a <video> element to display the local video so the user can see what they are sending. This video element is typically styled with a transform such as transform: scaleX(-1) in order to horizontally flip the display of the attached MediaStream. Horizontal flipping is done to achieve a more natural mirror effect.

Due to #81 and #83 styling in picture-in-picture mode is ignored, which means there is no way to achieve the mirror effect. I'm wondering whether it might make sense to allow for an exception to that rule to permit a transform that horizontally flips the video for this use case?

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