No audio in VLC when converting MKV, WebM, AVI, FLV, MOV, VOB to MP4? Here are 4 ways to fix the error. Besides spending hours to fix endless VLC errors, you can also resort to a lightweight video processing tool, VideoProc Converter, to convert video to MP4 with audio kept. Jump to Method 4 to save your time and effort.
VLC is a free media player for users to enjoy videos and do some simple editing tasks. It is not without problems however. Some users found that VLC was not able to open the MP4 (AAC) audio encoder, others complained that there is no sound after VLC convert video to MP4.
"I've spent the last 2 hours trying to convert 3 .mov files to .mp4 and every time there has been no audio. I downloaded quicktime and played the videos in that and there was sound, but every time I have converted the videos through VLC or handbrake… I still have no sound. Is there any fix for this?" – A user from VLC forum.
It's annoying that VLC won't play WebM, VOB, MKV, AVI, MOV videos occasionally. Even worse, when you spend large chunk of time transcoding MOV to MP4 only to find the error of VLC convert to MP4 no audio.
Are there any possible solutions that may work on it?
After updating VLC to the latest version, checking targe video bitrate, you can also check bitrates and tweak strict standard compliance in advanced settings. Detailed steps are coverted below.
Method 1. Enable Audio Stream in Codec Settings
One possible cause of the no audio error after VLC conversion is that, the audio stream may not be ticked in codec settings.
A video – or more precisely, the video container - is made up of video stream and audio stream. That's why you can extract audio from video, or mute audio without affecting video.
Now that you are converting WebM, MKV, AVI, MOV, VOB to mp4 in VLC (and possibly many other other formats), and you prefer to keep the sound, you need to make sure the Audio option is enabled.
Follow these steps if you are using VLC on Windows:
Step 1. Open up the Convert/Save window in VLC.
Click File > Convert/Save in the menu. The shortcut key is Ctrl+R.
Step 2. Add the video you want to convert, and hit the Convert/Save button at the bottom of the interface.
Step 3. Click the wrench icon to edit the selected profile.
Step 4. Enable Audio stream.
In the newly opened Profile edition window, click the Audio codec tab, and you shall see a box in front of Audio. Make sure it is ticked.
Step 5. Save the settings, browse the output path and start converting as you normally do.
Now you shall be able to convert video in VLC with sound preserved.
Follow these steps if you are using VLC on Mac:
The basic workflow is the same as the steps demonstrated above, except that some features have different naming in the Mac version of VLC.
Step 1. Go to File > Convert/Stream in VLC Mac version.
The shortcut key is Shift+cmd+S.
Step 2. Add video and click the Customize button next to the format profile.
Step 3. Click the Audio codec tab and tick Audio, Keep original audio track.
Step 4. Save the setting, click Save as File and choose an output folder to start converting video.
Playback the exported video, you shall be able to fix "VLC convert to MP4 no audio error", no matter you are converting VOB to MP4 in VLC, or dealing with MOV, MKV, FLV, WebM, AV1, HEVC videos.
Method 2: Change Audio Sample Rate in VLC
Generally speaking, VLC convert MOV to MP4 no audio is a universal problem, users trying to convert WebM, MKV, AVI, VOB to MP4 in VLC also complain that the sound is missing. It can be fixed by making sure that the conversion audio bitrates match. When the bitrates of the original file is not corresponding to that of your audio setting, VLC might produce a converted file without sound.
Follow these steps to make sure the bitrates match source file before converting.
Step 1. Check source video audio information.
Open the video file you intend to convert. Go to Tools > codec information > codec details, and check the audio sample rate. In this case, it's 48000 Hz.
Step 2. From VLC menu, go to Media > Convert/Save. Click Add to load your video, then hit Convert/Save button.
Step 3. In the Profile section, click the first button to edit selected profile.
Step 4. Click Audio codec tab, and change sample rate from whatever number to the one that matches source file. In this case, it's 48000 Hz.
Step 5. Click Save. Choose destination file path and hit Start to convert MOV to MP4.
Method 3: Change Strict Standard Compliance in VLC
Step 1. From VLC menu, go to tools > preferences.
Step 2. In the pop up window, click Input/Codecs, and from bottom of the screen, tick All to show advanced settings.
Step 3. Typing ffmpeg in the search box to quickly find it under video codecs setion, and set Strict standard compliance to -2.
Step 4. Save and close VLC. Restart it to do your job again.
Tried all the above solution but still no sound after converting MOV to MP4 with VLC? Plus, even if you have fixed the VLC no audio problem, you might face with the side effect of the video and audio being out of sync.
If you are tired of fixing back and forth with endless VLC errors relating to video conversion, you can take into consideration another solution to rule out your trouble once and forever.
Method 4: Fix VLC Convert to MP4 No Audio with a Professional Tool
VLC as a focused player might not be able to deal with video processing tasks nicely. You can handle the job to an all-in-one video processing software VideoProc Converter. With powerful converter built-in and full support of hardware acceleration, this lightweight tool is powerful and easy to use.
VideoProc Converter – Processing VLC Convert to MP4 No Sound
- Multi-format: HEVC, MKV, MP4, MOV etc. are perfectly supported.
- High-definition:4K 8K transcoding with high quality.
- High-stability: Eradicate errors like no audio or AV out of sync.
- High-speed: Full hardware acceleration to speed up conversion.
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Follow the video tutorial or read the text instructions below to convert MOV to MP4 with VideoProc Converter.
Step 1. Launch VideoProc Converter and click Video on the main screen.
Step 2. Click +Video on the top of the interface to load video files you intend to convert.
You can also simply drag and drop your WebM, MP4, MKV, AVI, MOV videos there (420+ formats supported).
Step 3. Make sure the Audio is checked.
- By default, the Audio stream is checked and you can just go on converting the video with sound kept.
- If there are multiple audio streams - for instance, many movies have multiple language voiceovers – you can choose to keep all or some of the audio, which is a super handy feature in VideoProc Converter.
Step 4. Choose output format, such as MP4, MOV, MKV, etc, and Click Run to start converting video with audio preserved.
Tips: Adjusting video codec and other settings is highly visualized and simple to manage. Click the gear shaped codec icon right beside your video, and make adjustment according to your own preferences.
VLC as an ad hoc video convertor might not cater to all your needs. Instead of spending time to amend VLC errors, you can resort to professional video processing tool VideoProc Converter.
Besides error free converting utilities, It also features video cutting, cropping, splitting, merging, rotating etc. Plus, you can use VideoProc Converter to download video/audio from other platforms and record your screen.
VideoProc Converter turns out to be the No.1 fast video processing software that delivers buttery smooth (4K) video editing and transcoding without jeopardizing video quality, making it the best mate to fix 4K video playback choppy in VLC.