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.m4a playback issues
Posted: 12 Feb 2012 01:07
by striple
I have several 24bit/96khz albums in FLAC that play fine in VLC on both my mac and PC. However if I convert them to ALAC (to add to my iTunes library) they no longer will play properly in VLC but they are fine in iTunes. This is only for 24bit/96khz, 16bit files play with no issues at all.
Has anyone else run into this issue before? I looked around in the audio preferences and didn't find anything to solve the problem. And searching through google didn't lead to anything.
Re: .m4a playback issues
Posted: 12 Feb 2012 11:25
by Jean-Baptiste Kempf
So you mean that ALAC 24bits/96kHz do not play in VLC? Very possible, this is not a common format.
File a bugreport on trac and upload a sample.
Re: .m4a playback issues
Posted: 09 Dec 2012 23:38
by gruvytune
i am also finding can't play m4a files 16 or 24bit in vlc without hearing distortion and noise.
if i convert to flac in dbpoweramp they play fine
foobar is the only thing aside from quicktime and itunes that play them
the alac codec in vlc is a problem i believe
Re: .m4a playback issues
Posted: 10 Dec 2012 14:44
by Jean-Baptiste Kempf
Yes, this will be fixed in 2.0.5
Re: .m4a playback issues
Posted: 19 Feb 2013 01:18
by clang
I am having same problem as OP, even with update to 2.0.5 for OS X. Converted a 24/96 FLAC to ALAC via Max. Made sure my Audio Midi Setup settings for my Mac were 24/96 before conversion. Resulting .m4a file plays in 24/96 in iTunes (the Get Info window in iTunes confirmed the file was 24/96), but comes out horribly distorted in VLC. Interestingly, when I checked the Codec Details panel of the VLC Media Information window, it listed the file as being in the ALAC codec, but at 16/44. Given this, is it possible the bug could be related to VLC just automatically assuming all .m4a files in ALAC codec are 16/44 and configuring them as such and not differentiating between ALAC encoded files with higher sample/bit rates?
Re: .m4a playback issues
Posted: 24 Feb 2013 21:29
by jsd
Same problem here. VLC 2.0.5, Mac OS 10.8.2. I make 24 bit/44.1kHz ALACs all the time of my own music and they just sound like white noise in VLC. The codec info window reports it as 16/44 so that's undoubtedly the source of the problem.
The problem is on Windows too, I sent one of my files to a musician I'm working with and he said the noise blew his head off. Ooops!
Here's a sample file
https://www.dropbox.com/s/dn2swz8zygg6i ... ter%29.m4a