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Image corruption in HEVC software decode plug-in

The prerequisites are quite strict, but it can happen when the following conditions are met.

If you decode two HEVC videos of 3840x2160 Main 4:2:2 10bit Intra Profile from a single app in a multi-threaded manner at the same time, a band with Y = 0 / U = 0 / V = 0 may occur at the bottom of one of the videos.
The rate of occurrence varies depending on the environment and stream, and it is not a certainty, but even in the worst case, it occurs after 10,000 attempts.

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