#11299: Audio PSNR values have strange range
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Reporter: Jing Lu | Type: defect
Status: new | Priority: normal
Component: avfilter | Version: 6.1.1
Keywords: psnr | Blocked By:
Blocking: | Reproduced by developer: 1
Analyzed by developer: 0 |
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An example:
{{{
ffmpeg -f lavfi -i 'sine=frequency=1000:sample_rate=44100:duration=1s'
-c:a pcm_u8 ~/sineu8.wav
ffmpeg -f lavfi -i 'sine=frequency=1000:sample_rate=44100:duration=1s'
-c:a pcm_s16le ~/sines16le.wav
ffmpeg -i ~/sineu8.wav -i ~/sines16le.wav -filter_complex apsnr -f null
/dev/null
}}}
Outputs:
> [Parsed_apsnr_0 @ 0x5562352d60c0] PSNR ch0: 166.661 dB
This issue is reproducible at v6.1.1 (and many versions before it).
The value of 166.661 dB is rather high (over 100); I'd expect the PSNR to
be around ~53 dB.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/11299>
FFmpeg <https://ffmpeg.org>
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