共计 528 个字符，预计需要花费 2 分钟才能阅读完成。
关键帧有 I 帧、P 帧、B 帧
咱们关注的是 I 帧，因为 I 帧少，P 帧和 B 帧太太多了
应用 pyav 获取 I 帧，能够用上面的代码：
样例代码：
import av
import av.datasets
content = av.datasets.curated("pexels/time-lapse-video-of-night-sky-857195.mp4")
with av.open(content) as container:
# Signal that we only want to look at keyframes.
stream = container.streams.video[0]
stream.codec_context.skip_frame = "NONKEY"
for frame in container.decode(stream):
print(frame)
# We use `frame.pts` as `frame.index` won't make must sense with the `skip_frame`.
frame.to_image().save("night-sky.{:04d}.jpg".format(frame.pts),
quality=80,
)
视频数据处理办法！对于开源软件 FFmpeg 视频抽帧的学习
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