Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

No Sound MacBook Pro MP4

Posted on 2013-11-15
8
Medium Priority
?
1,314 Views
Last Modified: 2013-11-16
Just picked up a MackBook Pro this afternoon. None of the MP4 video files I have created previously have sound. Downloaded them to the desktop and video plays but no sound. Mute is NOT on.
0
Comment
Question by:xmouser
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 4
8 Comments
 
LVL 11

Expert Comment

by:Gregory Miller
ID: 39652715
I have to ask the obvious question because you did not specify... Do you get sound from any application? If yes, then you need to install the necessary CODEC that was used to encode the audio in the MP4 files you have. If NO, well you must solve this first. Check the port where the speakers are plugged into if using external speakers that is.
0
 

Author Comment

by:xmouser
ID: 39653068
Yes getting sound from everything except imported video files that work fine on the PC.
0
 

Author Comment

by:xmouser
ID: 39653069
Internal speakers only.
0
Create the perfect environment for any meeting

You might have a modern environment with all sorts of high-tech equipment, but what makes it worthwhile is how you seamlessly bring together the presentation with audio, video and lighting. The ATEN Control System provides integrated control and system automation.

 
LVL 11

Accepted Solution

by:
Gregory Miller earned 2000 total points
ID: 39653192
definitely a CODEC issue. You will need to figure out the CODEC that was used to encode the MP4 audio streams and see if there is a CODEC available for Mac OS.

I am reading that VLC may may already be installed on the Mac and will work directly.
0
 

Author Comment

by:xmouser
ID: 39653204
Other MP4s work fine the only ones that are givinge me issues are ones previously edited.
0
 
LVL 11

Expert Comment

by:Gregory Miller
ID: 39653210
The software used to edit the file is where the issue comes from. Any program that creates an audio or video stream for playback has to be encoded with a CODEC. There are dozens, if not hundreds of different CODECs in the wild. The same CODEC must be used to decode the stream during playback. Whatever CODEC was used to encode the file you have MUST be used to DECODE the file. There is really no other option.

Did you try the VLC program? What program did you use to edit the files on the PC?
0
 

Author Comment

by:xmouser
ID: 39653217
Yes, VLC is playing correctly - I'm happy with that.
0
 
LVL 11

Expert Comment

by:Gregory Miller
ID: 39653221
Cool...
0

Featured Post

Ransomware-A Revenue Bonanza for Service Providers

Ransomware – malware that gets on your customers’ computers, encrypts their data, and extorts a hefty ransom for the decryption keys – is a surging new threat.  The purpose of this eBook is to educate the reader about ransomware attacks.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

A lot of new and distinct gadgets are making their appearance every other day. The latest gadget that has wooed the attention of all gadget lovers and non gadget lovers alike is the Smartwatch. This tiny gadget is capable of offering live access to …
In this article we have discussed about the OS X EI Capitan and how to fix Wi-Fi issue in OS X El Capitan. We have explained how to delete system level preferences and create a new Wi-Fi location to resolve Wi-Fi issue.
Users will learn how resize a batch of photos from a single command in Photoshop via Photoshop's Image Processor. Open up an Image you'd like to resize in Adobe Photoshop: Adjust the image size according to your preferences. Image > Adjustments > …
Users will learn how to set proper sequence settings, scale images, paste attributes, add transitions, fades, and music. Open up Final Cut Pro 7 and Create a new Project: Set the Sequence Settings. a) Click File > Easy Setup > Format > Apple ProRe…

715 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question