[FFmpeg-user] Capturing the output of volumedetect as JSON

redneb8888 redneb8888 at gmail.com
Wed Oct 3 20:22:10 EEST 2018

Hi *,

ffprobe can nowadays produce JSON output, which is quite convenient
sometimes. I am trying to use that feature in order to get the output
of volumedetect as JSON. I tried the following:

    ffprobe -loglevel error -of json=c=1 -show_entries root -f lavfi
-i 'movie=filename=clip.mkv:streams=a,volumedetect'

The "-show_entries root" means that all information should be included
in the JSON output, but still I cannot find anything from volumedetect
there. On the other hand, the above trick works just fine with other
filters, e.g. for cropdetect you can do

    ffprobe -loglevel error -of json=c=1 -show_entries frame_tags -f
lavfi -i 'movie=filename=clip.mkv:streams=v,cropdetect'

Is there a way to make this work? Or is this a shortcoming of volumedetect?


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