Changes to video size during seek HLS content cause video to remain in seeking state

• Component: Media
• Status: NEW ---

[Aaron Boushley]

Tested in the stable release of Safari 10.0 as well as in the nightly version r207871

1) Begin playback of HLS content in a video tag
2) Perform a seek operation on the video element (set the currentTime property)
3) Add a class that causes the size of the video element to be changed

Expected Result:
Video finishes seeking and plays back at the new size. Firing `seeked` event and leaving the `seeking` state.

Actual Result:
Video finishes seeking and plays back at the new size. However the `seeked` event never fires and the video remains in the `seeking` state.

You can see an example of this happening at the following jsfiddle:

https://jsfiddle.net/boushley/p11mpb6q/

You can see an example of side by side videos one that has the problem and one that doesn't at this jsfiddle:

https://jsfiddle.net/boushley/p11mpb6q/4/

[Jer Noble]

Aaron, on what OS are you seeing this? Yosemite, El Capitan, or Sierra?

[Aaron Boushley]

I see this consistently in El Capitan. Looks like it doesn't reproduce on Sierra. I don't have a Yosemite box to test on.

[Jer Noble]

(In reply to comment #2)
> I see this consistently in El Capitan. Looks like it doesn't reproduce on
> Sierra. I don't have a Yosemite box to test on.

I suspect that this is a platform bug which was fixed in Sierra.

[Radar WebKit Bug Importer]

<rdar://problem/29055585>