FFmpeg commonly used commands study notes (nine) audio and video cropping

Crop video:

ffmpeg -i src.mp4  -ss 00:00:00 -t 00:00:20 des.mp4 裁剪前20秒 

Remove the video sound:

ffmpeg -i src.mp4 -c:v copy -an des.mp4 

Audio and video file synthesis operation:

ffmpeg -f  concat  -i src.txt des.mp4

src是文件合集 格式为 file filename 

第二种方式：

ffmpeg -i src.mp3 -i src.mp4 des.mp4

Video to gif:

ffmpeg -i src.mp4 des.gif 

High-quality video to gif:

ffmpeg -i src.mp4 -b 2048k des.gif

Operating Audio

Audio cut:

ffmpeg -i src.mp3  -ss 00:00:00 -t 00:00:20 des.mp3 裁剪前20秒