While testing qaac 0.91 with commandline
eac3to.exe "d:\temp\test.dts" stdout.wav | qaac.exe --tvbr 87 --quality 2 --ignorelength - f:\temp\captures\test_qaac.m4a
I got this error:
initializing QTML...done
qaac 0.91, QuickTime 7.7.0
<stdin>
5.1 (L R C LFE Lsd Rsd) -> 5.1 (C L R Ls Rs LFE)
01:58:36.992 (9.0x)
341615616/-1 samples processed in 13:12.360
Overall bitrate: 480.431kbps
7099/7099 chunks written (optimizing)
test_qaac.m4a
_wfopen: f:\temp\captures\test_qaac.m4a: No such file or directory
It seems that the AAC file is encoded as stdin.m4a in the eac3to directory but was never moved to the final destination and renamed.