I'll have to run some tests if that has negative results for other files, but in theory it should not have.
Thinking about it, i'm not sure why i coded it like that.
If someone else wants, i would appreciate some tests using the version linked with various audio codecs, if you notice any problems.
Just to be sure you see it, here is the link again:
http://files.1f0.de/lavf/LAVFilters-...itter-test.zip