Adding a 14:34 min MPG-4 video turns to a 7:17 minute media on Premiere Rush

Thanks for including the screenshot. I think it has an important clue: two frame rates:

• Frame Rate: 59.94
• Original Frame Rate: 29.97

What can you tell us about the origins of this clip? Device/camera, settings... 

Hi danilonecher!

Welcome to the community. Could you share more info with us?

• Which version of Premiere Rush are you using? https://community.adobe.com/t5/premiere-rush/finding-the-premiere-rush-version-number/m-p/4788185
• Did you import any other footage and experience the same behavior?
• Which device are you using Rush on?

Waiting for your response.

Thanks,

Kartika

A more complete MediaInfo report might be helpful.

With the clip open in MediaInfo, set View to Text and copy the text from the report and paste it to this forum.

Also, is this video from a camcorder or from some other source?