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manpage: add showvolume example to --lavfi-complex

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Pretty useful for debugging surround nonsense.
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wm4
2016-02-27 00:11:53 +01:00
parent 72aea5a12b
commit 1762d33971
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DOCS/man/options.rst
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@@ -3600,6 +3600,9 @@ Miscellaneous
to fix the size).
- ``--lavfi-complex='[aid1] asplit [ao] [t] ; [t] aphasemeter [t2] ; [vid1] [t2] overlay [vo]'``
Play audio track 1, and overlay its visualization over video track 1.
- ``--lavfi-complex='[aid1] asplit [t1] [ao] ; [t1] showvolume [t2] ; [vid1] [t2] overlay [vo]'``
Play audio track 1, and overlay the measured volume for each speaker
over video track 1.
See the FFmpeg libavfilter documentation for details on the filter.