Please file a bug at bugreport.apple.com. We'd like to look into
this. It's essential that you provide us with a test application
that follows the exact steps your app follows. Other important
information: what is it that's slower? InsertTrackSegment? Or the
export itself? I'm guessing the export itself. What API's are you
using to do the export? ConvertMovieToFile/DataRef?
Thanks.
-Brad Ford
QuickTime Engineering
On Dec 20, 2005, at 12:51 AM, Trygve Inda wrote:
I am assembling a QT audio-only movie with NewMovieFromFile and
InsertTrackSegment. (each of which are called about 20 times).
I then export this to an AAC MP4 with the standard QT exporter but
a custom
progress bar. In QT652 it was slow, but reasonable (7 minutes to
export a 20
minute audio file).
Under QT703 it takes 20-30 minutes to do the same thing. The 20
source files
are all MP3 and we are trying to compress them all onto a single
track MP4.
It works, but is very slow indeed.
Any thoughts or clues?
Trygve
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