I have studied attached mp3 and, i think, have found in what a problem. It is similar to about what I wrote, but instead of number of channels here it is a question of frequency of digitization.
The file is coded with frequency of 22050 Hz, with such frequency mpg123 plays it, but oggenc on-default means frequency of 44100 Hz, and a parameter -R to it is not set. Therefore the coded file playing twice faster.
I have studied attached mp3 and, i think, have found in what a problem. It is similar to about what I wrote, but instead of number of channels here it is a question of frequency of digitization.
The file is coded with frequency of 22050 Hz, with such frequency mpg123 plays it, but oggenc on-default means frequency of 44100 Hz, and a parameter -R to it is not set. Therefore the coded file playing twice faster.