This bug only happens to helix device. I never tested it at other HDPI device. But it doesn't happen to other 320x480 devices, like Inari, Ikura, Unagi, etc. STR: 1. put videos into device, the last modified date of video files must have different year and month, like: video-a.3gp: 2013-09-12 hh:mm:dd video-b.3gp: 2013-10-16 hh:mm:dd video-c.3gp: 2013-08-01 hh:mm:dd So that, the video app will put video-a, video-b, and video-c into three groups. 2. open video app 3. scroll with your finger at the position of video-a <== slow scroll. Expected: scroll is smooth.
I had tested the code in gaia side. If we change the border-top from 0.1rem to 0.2rem or remove it. The scrolling becomes smooth.  https://github.com/mozilla-b2g/gaia/blob/master/apps/video/style/video.css#L150
Created attachment 818211 [details] border-top: 1rem This video is the original setting, border-top: 1rem. The scrolling is not smooth.
Created attachment 818213 [details] border-top: 2rem This video is with 2rem in border-top. The scrolling is smooth.
Testing at: PVT Build: master build for helix 20131002040206 Flashed with gaia master
Firefox OS is not being worked on
Status: NEW → RESOLVED
Last Resolved: 10 months ago
Resolution: --- → WONTFIX
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