Accumulating rowsI didn't want to keep every video frame forever. At 15fps, you'd accumulate about 108,000 rows/hour per active call. So there's a cleanup job that runs every 2 seconds and prunes frames older than 5 seconds:
Борющаяся с раком Симоньян высказалась о проведении прощального вечера18:00
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于是，3月27日续约当日股价短暂上扬后，随后两个交易日乐华股价再度暴跌。
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