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Maximum Decibel Level in Video File

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Maximum Decibel Level in Video File

Postby chris85 » Mon Apr 03, 2017 3:48 pm

I'm using:

Code: Select all
ffmpeg -i /var/www/CDNFiles/Video_1Web.mp4 -af "volumedetect" -f null /dev/null/ 2>&1

and getting back:

frame=19323 fps=1143 q=0.0 Lsize=N/A time=00:12:52.92 bitrate=N/A
video:1812kB audio:144184kB subtitle:0 global headers:0kB muxing overhead -100.000015%
n_samples: 73822208
[Parsed_volumedetect_0 @ 0x7f77e0] mean_volume: -22.6 dB
[Parsed_volumedetect_0 @ 0x7f77e0] max_volume: 0.0 dB
[Parsed_volumedetect_0 @ 0x7f77e0] histogram_0db: 8169
[Parsed_volumedetect_0 @ 0x7f77e0] histogram_1db: 388
[Parsed_volumedetect_0 @ 0x7f77e0] histogram_2db: 531
[Parsed_volumedetect_0 @ 0x7f77e0] histogram_3db: 2389
[Parsed_volumedetect_0 @ 0x7f77e0] histogram_4db: 5039
[Parsed_volumedetect_0 @ 0x7f77e0] histogram_5db: 12128
[Parsed_volumedetect_0 @ 0x7f77e0] histogram_6db: 24978
[Parsed_volumedetect_0 @ 0x7f77e0] histogram_7db: 48077

However the "max_volume" is higher than 0.0 dBs. We have about 100 video files we are trying to analyze and we know one of them is considerably higher than the others but many of them bring back 0.0 max_volume ratings. I'm thinking the max_volume, stops at 0. Is this correct, and if so is there a way to detect positive decibel levels?

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Joined: Mon Apr 03, 2017 3:43 pm

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