ffmpeg.exe -i test.mp4 -vn -acodec copy -ss 00:00:00 -t 00:01:32 output.mp3


ffmpeg.exe -i test1.mp4 -vn copy -ss 00:00:00 -t 00:05:10 output2.mp4
ffmpeg.exe -i test1.mp4 -ss 00:00:00 -t 00:01:10 output2.mp4

https://ai.baidu.com/docs#/ASR-Tool-convert/top
ffmpeg -y  -i output20.mp4  -acodec pcm_s16le -f s16le -ac 1 -ar 16000 16k.pcm
ffmpeg -y  -i output20.mp4  -acodec pcm_s16le -f s16le -ac 1 -ar 16000 16k.wav