This also adjusts the time delta check to use floored milliseconds. In 6[fps WebM videos, the video frame durations are 16.0, 17.0, 17.0, 16.0, 17.0, 17.0, ... so we need to consider frames with 16.0ms as displayable even when the target frame duration is 16.67ms, otherwise we gloss over one third of the frames when counting potentially dropped frames. Depends on D82634
Bug 1578042 Comment 13 Edit History
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This also adjusts the time delta check to use floored milliseconds. In 60fps WebM videos, the video frame durations are 16.0, 17.0, 17.0, 16.0, 17.0, 17.0, ... so we need to consider frames with 16.0ms as displayable even when the target frame duration is 16.67ms, otherwise we gloss over one third of the frames when counting potentially dropped frames. Depends on D82634