Changes between Version 2 and Version 3 of Ticket #9307


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Timestamp:
Jun 28, 2021, 4:21:41 AM (5 years ago)
Author:
Misaki
Comment:

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  • Ticket #9307

    • Property Summary Seeking to the start of some files produces noise spike → Decoding of Opus audio with missing packets produces produces noise spike

  • Ticket #9307 – Description

    v2 v3  
    11Summary of the bug:
    2 With some files, seeking to the start produces a noise spike.
     2OLD: With some files, seeking to the start produces a noise spike.
     3
     4UPDATED: Output levels from Opus decoding can vary greatly if some packets at the start are missing, either because they weren't included in the stream or because ffplay seeks to a video keyframe that comes after those packets.
     5
    36
    47In the past, I found this was the case with a slight change in volume when encoding audio. So, for example, the filter "volume=0.8734" would produce a 'bugged' file that would cause this noise spike, while "volume=0.8733" would not. I waited to report it until I could use a more recent version of ffmpeg and ffplay.