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Fiona Glaser authored
Uses past motion information instead of future data from the lookahead. Not as accurate, but better than nothing in zero-latency compression when a lookahead isn't available. Currently resets on keyframes, so only available if intra-refresh is set, to avoid pops on non-scenecut keyframes. Not on by default with any preset/tune combination; must be enabled explicitly if --tune zerolatency is used. Also slightly modify encoding presets: disable rc-lookahead in the fastest presets. Enable MB-tree in "veryfast", albeit with a very short lookahead.
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