Fix No Sound Video or No Sound on YouTube Easily

You've finally made it! The MP4 file you wanted for so long is finally on your device, and now all it takes is opening it. But, the MP4 file doesn't have any sound. Now what? Don't panic, as every problem has a root cause that you will be able to determine by using this handy checklist. Once you diagnose the issue, you will be able to fix no sound video with relatively little effort and without having to rage against the machine. Sometimes, the MP4 file you've recorded with one device will refuse to play its sound on another device. However, the MP4 file format is supposed to be universally compatible across all platforms and operating systems. It isn't a cause for alarm, as such things happen quite often without anyone being at fault.

The good news is that the problem is very rarely related to hardware. It means that you will most likely not have to fiddle with wiring or take your device to a licensed professional for a costly repair. The bad news is it could be any piece of software on your device that's causing the problem or even the file itself could be corrupted beyond repair, and it's merely impossible to know what's the cause in advance. While it won't cost you anything to try to fix the problem of muted MP4 files by yourself, read the following top 3 causes, and work the troubleshooting guide as well. So arm yourself with patience, and let's get an easy and fast way to fix the issue. After fixing the MP4 sound issue, you'll be able to play the MP4 videos on Windows Media Player with ease.

• Part 1. Top 3 Causes of MP4 No Sound
• Part 2. Troubleshooting Guide for No Sound Video(Important)
• Part 3. How to Fix YouTube No Sound Easily

Part 1. Top 3 Causes of MP4 No Sound

As mentioned above, these solutions do not take into account the possibility of damaged hardware, causing your MP4 not to have any sound. While possible in theory, these cases are sporadic in practice, and you shouldn't be trying to fix them yourself anyway. If all solutions listed here fail, it's most likely a hardware error, and you ought to back up your data and take the computer to a licensed technician for repair.

Cause #1 – Faulty codecs

Codecs are little pieces of code sitting in the operating system and activated only when a particular multimedia file or a video game asks for them to be enabled. If a specific codec isn't present or isn't working correctly, the associated media file or function won't be able to activate. It can result in anything from video artifacts only in specific resolutions to sound distortions. Unfortunately, from time to time, the software fails, and there is nothing you can do to prevent it. Another problem is that codecs are considered non-essential and are generally up to the user to download and install.

Missing codecs will almost always be noted by the media player when you try to open the file that asks for them. The solution to this problem is relatively straightforward. It involves downloading and installing the K-Lite Codec Pack by going to this link (http://www.codecguide.com/download_k-lite_codec_pack_full.htm) and clicking either of the links shown below.

It is a comprehensive package containing all the possible media codecs for playing even the most obscure file formats accurately. Once you download the K-Lite Codec Pack, please install it using the default installation options and restart your computer.

Cause #2 – Corrupted media player installation

Things used to be so simple when it came to installing software ten years ago. Those were the naive times when the user had full control over his computer. Today, operating systems are locked down to the point of barely functioning, which can even impair the media players' operation. In other cases, botched installations or unrelated updates can create a jumbled mess out of your trusty media player. In such cases, you can try reverting to a previous state by using Windows System Restore. Otherwise, if one of the media mentioned above players seems to work much better than the one you've previously used, it's probably a good idea to switch to it.

Cause #3 – Corrupted MP4 file

"He's dead, Jim." The file has been corrupted beyond recovery, and there can be any number of reasons why this happened. As always, the best approach is prevention. Ideally, media files you don't want to have corrupted will be backed up immediately upon recording to a cloud-based storage service. Or you can also attach the data to an e-mail and send it right back to yourself.

Alternatively, you can fix your file through conversion with Wondershare UniConverter (originally Wondershare Video Converter Ultimate), while the conversion, you can also change the video codec. Also, you can download or record the same MP4 file or other format videos from YouTube and other websites. All these tips help you fix your video without sound issues, including MP4 videos, MKV videos, and even iPhone videos.

How to fix no sound in an MP4 file with Wondershare UniConverter?

Before getting started, you can watch the video tutorial below to learn the process first.

Step 1 Open Wondershare UniConverter and load the MP4 file.

After downloading and installing the software on your computer, launch it. Next, you need to add the MP4 file that you want to fix by the drag-and-drop feature.

Step 2 Edit the MP4 video encoder and choose MP4 as the target format.

Once the video file is added to the software interface, open the drop-down menu next to the "Output Format:" option, click Video > MP4 > the edit icon beside the resolution to enter the video editing window. After that, change the video encoder to H.264/MPEG-4 or else. And click Create to make a customized format, and select the format to go ahead.

Step 3 Convert video files to MP4 to fix the problem.

Finally, click the Convert button or Start All button to start the conversion process. You can find the fixed MP4 file in the Output folder.

Note: Wondershare UniConverter supports file conversion between 1000 formats. So if you don't have a sound in a video in other formats, Wondershare UniConverter can meet your needs.

Part 2. Troubleshooting Guide for No Sound Video(Important)

Based on the top 3 causes in this article, each of the following sections will recommend a simple diagnostic action, and, based on the results you get, you can try to find out what the reason might be, scroll down to the end.

1. Can the file be played in other players correctly?

Try playing the MP4 in several media players on your computer and see if the problem is reproduced. If you don't already have an alternate media player, here are a few free recommendations.

Download VLC Player by going to this link and clicking the big orange button, as shown in the picture below.

GOM Player initiates its download by clicking the button shown below.

Finally, you can get the MPC-HC player by clicking here and then clicking the button shown below.

Now, try playing the problematic MP4 file in any of the above players. If the file doesn't have any sound in other players either, it's most likely Cause #1. If there is an error message displayed when you try to play the file, it's Cause #2.

2. Is that MP4 file the only video without a sound?

Next, try to see if you have just a single MP4 file that's giving you problems or more than one. Make sure to check several MP4 files that you're certain played correctly in the past and check them all in a single media player. If there is just one file that's giving you a problem and the others work just fine, it's most likely Cause #3. If all MP4 files suddenly refuse to play sound or function at all, it is most likely Cause #2.

Part 3. How to Fix YouTube No Sound Easily

Solution #1: Make Sure Volume is Not Muted:

Most of the time, when people face the issue on YouTube, the reason may be that your sound is muted for YouTube videos. You can easily verify this issue by visiting the videos on YouTube. To solve out a mute problem, you can follow the steps below.

Visit the YouTube and play a video that you want to view and where you are facing an MP4 video without sound, then look at the lower right side and move a cursor on the speaker icon. If the speaker icon is coming with the crossed sign, then click on it to unmute, and then you will start listening to the sound. You can also unmute volume by pressing M from your keyboard on YouTube.

Solution #2: Using incognito / Private Tab

Sometimes you may face the issue because of the large cache files stored on your computer as well. For this, you can open an Incognito tab to solve it on Windows 10 or other operating-system devices. Please follow the below steps to solve the issue using the Incognito tab. We will use the Mozilla Firefox browser here as an example.

Step 1: Open the Mozilla Firefox browser and click on the Menu option, which is available at the top right side with three straight lines.

Step 2: Click New Private Window after opening Menu.

Step 3: In the separate window, now you can browse YouTube videos, and there are chances that you will not face this problem.

Solution #3: Open Volume Mixer and Increase Volume

Sometimes you face the issue because of the less system volume as well. To overcome this problem, you can increase the sound volume from the volume mixer. To overcome the issue on Windows 10, you can directly do it from your desktop. Just follow the below steps to increase volume.

Step 1: Firstly, right-click on the volume icon at the lower right side of your desktop in windows 10. Now, a new popup will open on your screen. Click Open Volume Mixer in the popup window.

Step 2: Now, you will see volume controls for different applications. Click on the volume slider now and move it on the upper side to increase volume. Make sure to do this for all options available in this window. Now you will start listening to the sound in your YouTube videos.

Solution #4: Updating the Drivers

Drivers play an essential part in the windows and other operating systems. If you are still not getting sound in the YouTube videos, you can check for driver updates and update them to the latest version.

Step 1: In the windows 10, click in the search bar and then type Device Manager. Now hit on the Device Manager to open it.

Step 2: In the Device Manager tab, click on the Sound, Video, and Game Controller, then right-click on the audio device name and hit Update Driver.

Step 3: Make sure that your computer has an internet connection. Now hit Search Automatically for Updated Driver Software. Now the window will search for the latest drivers automatically and install it on your computer. It is how to solve the issue on Windows 10.