使用 mac 自带 afinfo 查看音频信息
命令行信息
afinfo ./S05.mp3
结果：
afinfo /Volumes/T7/zyb_T7/shizi_words/bundles/bundle_0123/audio/play/S05.mp3
File: /Volumes/T7/zyb_T7/shizi_words/bundles/bundle_0123/audio/play/S05.mp3
File type ID: MPG3
Num Tracks: 1
----
Data format: 2 ch, 44100 Hz, '.mp3' (0x00000000) 0 bits/channel, 0 bytes/packet, 1152 frames/packet, 0 bytes/frame
no channel layout.
estimated duration: 1.641938 sec
audio bytes: 26271
audio packets: 63
bit rate: 128000 bits per second
packet size upper bound: 1052
maximum packet size: 417
audio data file offset: 0
optimized
----
筛选信息
afinfo ./S05.mp3 | grep duration
结果
其余参数：
