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candyan/gist:bfd537fa549510ab411ed08c28192fc8

Last active December 16, 2016 09:59
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gistfile1.txt
ffmpeg -i $video_file -vn -ar 16000 -ac 1 -acodec pcm_s16le -ss 00:01:00 -t 00:00:30 $audio.wav
-vn 排除视频 (-an 排除音频 / -sn 排除字幕)
-ar 采样率
-ac 声道数量
-acodec 编码 ( flac / pcm_s16le(16bit 线性PCM) )
-ss 开始时间点
-t 时长
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