VLC: aliasing in audio

[Paul]

There seems to be a problem with aliasing in VideoLanClient. Some
video's that play in windows without aliasing in the Core mediaplayer
for example seem to be played back with aliasing distortions
(frequencies) with the VLC for BeOS.

An interesting example is Bruce Almighty, in windows this film is not
played back properly: video and audio are out of sync, whereas in BeOS
they're perfectly in sync but there is very noticable aliasing of the
sound.

The aliasing effect does occur with proper video's as well. I use
Genelec 1029A active studiomonitors and I've noticed all kinds of
compression artifacts in audio since I have them, the worst
compression is still mp3, I wonder why people still use it to encode
audio when there is ogg or aac.

Paul

[revol]

Post by Paul
There seems to be a problem with aliasing in VideoLanClient. Some
video's that play in windows without aliasing in the Core mediaplayer
for example seem to be played back with aliasing distortions
(frequencies) with the VLC for BeOS.
An interesting example is Bruce Almighty, in windows this film is not
played back properly: video and audio are out of sync, whereas in BeOS
they're perfectly in sync but there is very noticable aliasing of the
sound.
The aliasing effect does occur with proper video's as well. I use
Genelec 1029A active studiomonitors and I've noticed all kinds of
compression artifacts in audio since I have them, the worst
compression is still mp3, I wonder why people still use it to encode
audio when there is ogg or aac.

Problem is VLC often decides to oversample the audio because it thinks
it's late or early, and to stretch some frames to stay in sync.
Didn't find a way to disable resampling in VLC yet.

François.