人 民 网 版 权 所 有 ，未 经 书 面 授 权 禁 止 使 用
特点：负区间平滑非零，避免 ReLU 死区问题。
。电影对此有专业解读
https://source.android.com/devices/storage#runtime_permissions
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.
Что думаешь? Оцени!