Martin Ratinaud <martinratinaud@xxxxxxxxx> writes: > Hi all, > > I'm converting a file called vocals.wav to vocals.mp3 > vocals.wav > <https://drive.google.com/file/d/1he1eCJag1G8iGkgL932jy_mXuLT_khGM/view?usp=drive_web> > For this I'm using this command > > ``` > sox vocals.wav vocals.mp3 > ``` > and here is the result of the corresponding files > > - original file > ``` > soxi /Users/martin/Downloads/split-test/vocals.wav > > Input File : '/Users/martin/Downloads/split-test/vocals.wav' > Channels : 2 > Sample Rate : 44100 > Precision : 16-bit > Duration : 00:03:00.00 = 7938000 samples = 13500 CDDA sectors > File Size : 31.8M > Bit Rate : 1.41M > Sample Encoding: 16-bit Signed Integer PCM > ``` > > - converted file > ``` > soxi /Users/martin/Downloads/split-test/vocals.mp3 > > Input File : '/Users/martin/Downloads/split-test/vocals.mp3' > Channels : 2 > Sample Rate : 44100 > Precision : 16-bit > Duration : 00:03:00.04 = 7939544 samples = 13502.6 CDDA sectors > File Size : 2.88M > Bit Rate : 128k > Sample Encoding: MPEG audio (layer I, II or III) > ``` > > You can see that the duration is not the same which is weird and the number > of samples also changed. > In fact, 1544 samples have been added to the beginning of the file > > If I try to launch `sox -V vocals.mp3 vocals-trimmed.mp3 trim 1544s` it > does not work MP3 files have to have a multiple of 1152 samples. This can't be avoided. If the input isn't such a multiple, it will be padded by the encoder. -- Måns Rullgård _______________________________________________ Sox-users mailing list Sox-users@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/sox-users
