Comment 47 for bug 602934

(In reply to comment #34)
> (In reply to comment #33)
> > 1) No extreme time differences between m4a and other ffmpeg formats.
> > 2) The native exporter is faster than faac
> > 3) Faac exported files sound better
> > 4) Any file imported with faad gets imported as stereo
> > This was all done on the Mac...
> Thanks for your tests, Leland. BTW, switching between different versions of
> FFmpeg in Windows is seamless after applying your attached patch - no need for
> restart. Excellent! Would still be an ideal "sometime" to have it picked up at
> once when installed in the expected place while Audacity is open.
>

Yepper, I'd like to make the FFmpeg lib detection much simpler as well. I'll
look into it RSN.

> Your speed difference using faac between M4A and other exports is nearly 3x.

HAHAHA...that's funny! I didn't even notice that, so I guess there is some
truth to the "3 - 4 times" speed difference.

> Those differences between Audacity CLI and GUI for M4A and MP3 on Windows, and
> in the other direction on Ubuntu between Audacity CLI and GUI for M4A don't
> look "expected" or "reasonable" to me?
>

I thought the same thing. I wouldn't expect them to be THAT different. Maybe
a little, but not that much. I just tried it on the Mac and it was within a
second or two.

> I don't think we can do anything about 4) - importing mono as stereo?

Unfortunately, we still need to explain it since, at least on the Mac, Audacity
built without the 0.6.1 support patch imports those mono files as mono. :-(
I've banged my head against the wall on this several times now and haven't
figured out why. But, I haven't given up yet.