[Bug 772872] audioconvert: superfluous quantization when converting S24LE to S24LE causing extra CPU load

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=772872

--- Comment #9 from Petr Kulhavy <brain at jikos.cz> ---
(In reply to Nicolas Dufresne (stormer) from comment #8)
> Ok, I think I found why this example does not go in passthrough, it's
> missing channel-mask field. Adding channel-mask=0x03 make it go in
> passthrough. Now, 0x03 should be the default mask anyway no ?

I do see the message 
"audio-converter audio-converter.c:881:gst_audio_converter_new: same formats
and passthrough mixing -> passthrough"

even without adding the channel-mask=0x03. However the CPU usage is still
higher for S24LE than for S32LE, which I don't really understand why...

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