Crash when enable hardware decoding

When enable hardware decoding and playback streaming mp4 file, video is not smooth and sometimes app crash or video stop. It can reproduce easier if set repeat.

iOS : 11.0 (beta 10)

Device: iphone 5s

VLC version: 2.8.0 (280.5)

Video location: https://www.dropbox.com/s/163gzet2om3ys38/20170908_17220075.0.mp4?dl=0

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