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Update ffmpeg.md (#30)

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编辑视频剪切部分示例
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ryanhex53 2022-11-09 11:25:48 +08:00 committed by GitHub
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@ -170,7 +170,10 @@ $ ffmpeg -r 1 -i input.m2v -r 24 output.avi
<!--rehype:wrap-class=col-span-2--> <!--rehype:wrap-class=col-span-2-->
```bash ```bash
# 从1分45秒开始剪切2分35秒
$ ffmpeg -i <input> -ss 00:01:45 -t 00:02:35 -vcodec copy -acodec copy <output> $ ffmpeg -i <input> -ss 00:01:45 -t 00:02:35 -vcodec copy -acodec copy <output>
# 从1分45秒开始剪切到第4分20秒，与上一行等效
$ ffmpeg -i <input> -ss 00:01:45 -to 00:04:20 -codec copy <output>
$ ffmpeg -ss 00:00:30 -i orginalfile.mpg -t 00:00:05 -vcodec copy -acodec copy newfile.mpg $ ffmpeg -ss 00:00:30 -i orginalfile.mpg -t 00:00:05 -vcodec copy -acodec copy newfile.mpg
# 从 4.5 秒开始的 5 秒长的视频 # 从 4.5 秒开始的 5 秒长的视频
$ ffmpeg -i in.mp4 -ss 4.5 -t 5 out.mp4 $ ffmpeg -i in.mp4 -ss 4.5 -t 5 out.mp4