The VideoLAN Forums

VLC supports increasing the playback speed when listening to MP3 or watching a video file.
It would be fantastic if VLC could also take a MP3/AVI and then save it with the increase speed.
Thanks for reading through this request!

It should already work.

Thanks. Can you let me know how this can be done? I added the .mp3 whose speed i want to increase to the playlist, but when i right click the entry and choose save, i dont see any option which i can use to increase the playback speed.

You can add e.g. --rate=2.0 or :rate=0.5 to transcode part (Media -> Streaming... is the easiest part in Qt4 GUI). You can also transcode it via command-line, but yes, it would be good addition to GUIs.

Would it be possible for you to provide me the list of steps which i need to follow?
I tried the following:

1. Media -> Streaming
2. In the File Tab, added my .mp3 file
3. Checked "Show more options"
4. In the Edit options textbox (where it was already populated with ":file-caching=300"), added ":rate=0.5"
5. Clicked the down arrow next to the "Stream" button, and selected "Stream"
6. A new dialog pops up with "Source", "Destination" and "Options" sections.
7. In the Source section, i see the source filename is already populated with what i had selected earlier
8. In the destination section, i add an output file
9. I then click the "Stream" button
10. Nothing happens. I see an entry getting added to playlist, but nothing proceeds beyond that.

Thanks for your help!

Best place to add the rate option is the last page of streaming (which shows the sout command).

For more info, open Tools -> Messages (set Verbosity to 2) before you start the conversion. The message dialog will complain is something goes wrong.

This is an old thread, but I thought I'd post what worked for me....

First, for some reason, I had to save my 'converted' file to a more 'public' accessible folder... VLC would not save anything to the 'normal' folder/location which I chose at first... so I used C:\Temp folder. Message verbosity did nothing for me... no errors, no warnings, nada.

Start VLC.
Click Media, Convert/Save
Click Add, find/select your source audio/video file.
Click 'Show more options'
In the 'Edit Options' (it may already say :file-caching=300), add a space and your effect, such as :rate=1.25
...for example... :file-caching=300 :rate=1.25
If you see the button labelled "Convert/Save", click it...
...otherwise, click the little down arrow to the right of the button, then click 'Convert'.
Click 'Browse'', and browse to your destination folder...
...then type a filename-and-extension in the File name: input box
...(note the available file extensions displayed below the input box)
...for example... myfile.mp4
Click the 'Save' button.
Click the 'Start' button. (If you have other program window(s) open, the original VLC window may become hidden behind it... go to your 'taskbar' at bottom of Desktop, and click the VLC icon.)
In the VLC window, the progress bar will display activity... until it gets to the right-side end, then the activity will vanish, with nothing more shown... the VLC window reverts to previous inactive state.
Go to your destination folder, and hopefully you will find your 'converted' file.

I've found that slowing a file down didn't work so well for me... sound drops out; speeding it up works better, but can get 'quirks' (artifacts, corruptions, whatever) if you set rate too high. I presume there are other 'options' that may improve output... I just wanted to speed an audio/video up a little. It worked, and saved my new file.

this doesn't work at all, no change in speed. If anyone knows more please post it