By default, ffmpeg compresses the images quite a bit. It was enough that I could notice a quality difference when I put a paused frame of the video side-by-side with an extracted image. We can force ffmpeg to improve the quality with q:v (number). A smaller number here produces a higher quality image at the expense of file size and processing time. I’ve settled on a value of 3, but feel free to play around with this to get the quality or file sizes you want.
原油价格在冲突爆发后迅速突破每桶100美元大关。能源价格上涨直接转化为工厂用电成本、运费附加费以及塑料与石化原材料价格的上涨，这加剧了“用电焦虑”的美国算力巨头的心病。
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