I’m watching Sky News via the Apple TV app and I’ve noticed that their breaking news ticker seems to stagger and flicker at points. The rest of the graphics and video (including high motion) come through perfectly. Is this normal? Or some 50hz to 59.94hz conversion issue?
What platform are you watching on?
The ticker looks juddery as heck on an Apple TV 4K outputting at 50Hz to a 50Hz capable display - and the tvOS developer HUD confirms that the source stream 720p25.
Absolutely nothing is smooth at 25p, but the ticker is particularly bad as it's too fast for 25fps... It must look horrific at 59.94Hz with added 25->59.94Hz judder.
it's a pity Sky News don't follow the BBC's lead and stream at 720p50 (deinterlaced from 1080i25), which delivers twice the temporal resolution, and ensures the ticker stays smooth.
(Sky's deinterlacing from i25 to p25 is quite 'jerky' so they may not be optimised for motion and instead for resolution, though the bitrate is generous at 4.8Mbs for the video)
Last edited by noggin on 2 April 2019 7:14pm - 4 times in total