(In reply to comment #27) > I think you will be able to repro it on Windows (and I assume on FFmpeg 0.6.1 > too, but I have not tried with 0.6.1 yet). What happens on Mac? > Same sort of thing. If I create a mono M4A file using 0.6.1 and then try to import it using a v0.5 library, it will always import as stereo.
Maybe the the crux of the problem. Could be files structure is incompatible between the releases. > > > One thing that I did discover is that on 2010-05-14, the native aac encoder > > was updated and this caused a tremendous degradation in export quality. I > > do > > not believe this to be an Audacity issue since the ffmpeg command produces > > the same results. > > Agreed, but would still have to be release noted because we will be blamed > otherwise. > > Or could/should we disable Audacity support for the native aac encoder via > normal "M4A files" export? I think it would send an appropriate message. > I briefly looked into calling libfaac/libfaad dynamically, which could certainly be done, but I think a release note or disablement would be the better way to go. (Read that as "The easiest way." ;-)) > > > Another thing is that exporting a 10 minute chirp on my system consistently > > takes 22 seconds prior to the ffmpeg changes on 2010-04-02. After that > > date, > > exporting the same chirp consistently takes 35 seconds. Again, I do not > > believe this to be an Audacity problem since the ffmpeg command produces > > nearly the same time difference as Audacity. > That is a much less significant difference than that implied by the "3 - 4 > times slower" than Audacity export to other formats. Can you test on your > system: > The only time I got the 3 - 4 times slower exports was after I'd imported an OGG file. Can anyone else verify that the M4A exports (or any ffmpeg 0.6.1 file type) exports are WAY, WAY slower than with a previous version of Audacity? Leland -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/602934 Title: ffmpeg import/export not working with ffmpeg version in maverick -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
