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Additional reporting by Annabel Rackham and Mark Savage
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.，详情可参考PDF资料
目前来看，中泰证券的判断基本正确。在发布会的后半段所展示的10款车型，均搭载了第二代刀片电池和新的闪充技术，这些车型将成为比亚迪接下来反攻的关键。。业内人士推荐heLLoword翻译官方下载作为进阶阅读
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