#2342: ebur128 filter output seems to break format auto negotiation
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Reporter: cus | Owner:
Type: defect | Status: open
Priority: normal | Component: avfilter
Version: git-master | Resolution:
Keywords: ebur128 | Blocked By:
Blocking: | Reproduced by developer: 1
Analyzed by developer: 0 |
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Changes (by Cigaes):
* status: new => open
* reproduced: 0 => 1
Comment:
The problem is that {{{ebur128}}}'s {{{query_formats()}}} function sets
the supported channel layouts (and formats) separately on its input and
its audio output. That means lavfi is allowed to select them
independently, and that {{{ebur128}}} is expected to convert somehow. That
is not what happens: {{{ebur128}}} assumes that its input and audio output
have the same format and channel layout; for that, it is supposed to set
the supported formats and layouts together.
That is exactly what the fallback {{{query_formats()}}} code does,
therefore just removing the code fixes the bug.
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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2342#comment:1>
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