ffprobe/ffmpg静音检测命令 [英] ffprobe/ffmpg silence detection command

问题描述

我正在研究流静默检测. 它正在ffmpeg中执行以下命令:

I'm working on a stream silence detection. It's working on the following command in ffmpeg:

ffmpeg -i http://mystream.com/stream -af silencedetect=n=-50dB:d=0.5 -f null - 2> log.txt

我想获取日志文件的json输出. 'ffprobe'中有一个json选项，但silencedetect=n=-50dB:d=0.5不起作用.

I would like to get a json output of the logfile. There is a json option in 'ffprobe' but silencedetect=n=-50dB:d=0.5 is'nt working.

帮助！

干杯！

推荐答案

ffprobe用于探测容器级或流级元数据. silencedetect是用于分析解码音频流内容的过滤器；它的输出不受作者选择的控制.

ffprobe is meant to probe container-level or stream-level metadata. silencedetect is a filter which analyses the content of decoded audio streams; its output isn't controlled by the choice of writer.

您可以做的是，由于silencedetect也将其结果记录到元数据标签中，因此只会将该数据输出到文件中.

What you could do, since silencedetect also logs its result to metadata tags, is output just that data to a file.

ffmpeg -i http://mystream.com/stream -af silencedetect=n=-50dB:d=0.5,ametadata=print:file=log.txt -f null -

输出

frame:281  pts:323712  pts_time:6.744  
lavfi.silence_start=6.244
frame:285  pts:328320  pts_time:6.84   
lavfi.silence_end=6.84
lavfi.silence_duration=0.596
frame:413  pts:475776  pts_time:9.912  
lavfi.silence_start=9.412
frame:1224 pts:1410048 pts_time:29.376 
lavfi.silence_end=29.376
lavfi.silence_duration=19.964

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