Problem Sound on movie is too fast

I downloaded a movie from Youtube and the sound speed seems fast, like a cartoon character, is there a way to slow it down

Thank you

Dan

 

You have to change the pitch (without changing the running time).
Depending on the type of video (you didn't say), you open it with an audio editor like Audacity.
Use Effect > Change Pitch as you like it,then export the audio as a wav.
Now you have to replace the original audio with the new track.
You can generally do that using AviDemux or similar.

 

The file is mp4 Audicity will not open it

 

Run Audacity > Edit > Preferences > Libraries and download both plugins, then open the mp4.

 

I downloaded both plug ins but i am still getting the same error pop up from Audacity

 

What does the error say.
Do you have any information as to the codecs used by the video and audio (MediaInfo can be used to find out).

 

Typical mp4.

 

Here is a screen shot

 

The error says Mp4 is a advanced coding file, i need to convert it to WAVE or AIFF file

 

Once the ffmpeg plugin has been downloaded and Audacity pointed to where it's located it should open the file.
Did you point to the folder location ('Locate...') it after downloading?

 

Yes i pointed Aud to the FF file, i am converting the Mp4 to wav , lets see if this works, thanks for your help attar

 

Ok, i have the file converted to Wav

 

I am at the change pitch screen, how do i test it before changing the pitch

 

Click the 'Preview' button.
If it's to your liking, click 'OK'.
If you mess up, click 'Edit' on the main screen and undo the change.
Click 'File' > 'Export Audio' and save as a wav.