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audiomixer: document caps negotiation raciness

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Until we land conversion support in audioaggregator (#773762).

https://bugzilla.gnome.org/show_bug.cgi?id=777915
This commit is contained in:
Tim-Philipp Müller 2017-07-14 13:54:31 +01:00
parent 2ae763cc34
commit 1692f910e7
1 changed files with 9 additions and 1 deletions
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10
gst/audiomixer/gstaudiomixer.c
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@ -28,7 +28,15 @@
* The audiomixer allows to mix several streams into one by adding the data.
* Mixed data is clamped to the min/max values of the data format.
*
* Unlike the adder element audiomixer properly synchronises all input streams.
* Unlike the adder element audiomixer properly synchronises all input streams
* and also handles live inputs such as capture sources or RTP properly.
*
* Caps negotiation is inherently racy with the audiomixer element. You can set
* the "caps" property to force audiomixer to operate in a specific audio
* format, sample rate and channel count. In this case you may also need
* audioconvert and/or audioresample elements for each input stream before the
* audiomixer element to make sure the input branch can produce the forced
* format.
*
* The input pads are from a GstPad subclass and have additional
* properties to mute each pad individually and set the volume: