The VideoLAN Forums

I have some MP4 files that I want to convert to MP3.

I tried this...

1. Menu: Media -> Convert / Save
2. Specified the Source MP4 file via the dialog box
3. Now in Stream Output dialog...
4. Checked "File" checkbox.
5. Set Profile to "MP3"
6. Clicked "Save" button

I did it and the file was huge even though the bit rate was only 128. So I listened and that was because it got transcoded at half the speed. The file was about twice the size it should have been. I sped it up 2x while playing and it was perfect (which is how I deduced that it was encoded at half speed).

Is there some kind of option I need to use to set the speed?

Here's my string.... Again, I'm coming from mp4/HE-AAC to mp3.

In a previous post, a user suggested I hit the "Play Locally" checkbox in the Stream dialog. That did not change the problem with the speed unfortunately.

VLC: 0.9.8a
Win: XP Pro SP2

Can VLC be used to speed up an MP3 file?

Found the Answer!

The samplerate needed to be added to the parameter string, in the transcode section...
Now it works fine.

Maybe that could be added to the MP3 profile?

No luck for me, I entered in that string and the mp4 I'm trying to convert is still
long and distorted

Try this: (i'm using version 1.0)
1. Media -> Convert / Save
2. click Add and select the MP4 file
3. click Convert / Save
4. select profile mp3
5. click the icon on the right to edit profile and set encapsulation mpeg-ts
6. set the destination file with whatever extension

now repeat the process but this time load the new saved file, edit the mp3 profile and set encapsulation raw.
save with mp3 extension.

Hope this works.