drmeter filter can return invalid DR value (negative or nan)

[ocococ]

With some of my .flac files, value returned by drmeter filter can be negative or even "nan", using ffmpeg version 5.1.2 built on macos 12.6.3, running on M2 processor.

How to reproduce:

% ffmpeg -hide_banner -i sample.flac -af drmeter -f null - 2>&1 | grep -Eo 'Overall DR: .+'

[ocococ]

As attachement seems limited to 2.5 Mo,I uploaded a sample.flac file (28Mo) with videolanfileuploader under ticket #10232.

[ocococ]

Here is a dropbox link for the same sample.flac file: ​https://www.dropbox.com/s/oxhgid12glos0qc/sample.flac?dl=0

This returns -23 as DR value.

[ocococ]

I can confirm the problem still exists with version 6.0.

I also added another sample file here: ​https://www.dropbox.com/scl/fi/brzfbjyj3w74d99iul9na/sample2.flac?dl=0&rlkey=xwu0i85noyx0n58o08zajr058

This returns -74 as DR value.

[Balling]

Yep.

[Parsed_drmeter_0 @ 0000026f9b5c8500] Channel 1: DR: -74.8754
[Parsed_drmeter_0 @ 0000026f9b5c8500] Channel 2: DR: -74.3311
[Parsed_drmeter_0 @ 0000026f9b5c8500] Overall DR: -74.6032

[Elon Musk]

Fixed in 238ec0c31bea6da9a9124edb1d7beb68d54f9d9b.