This is why I recommended you inspect the file contents using a media player or dedicated utility app.

If you are able to hear the audio on your PC, then the most likely reason would be that the MP4 file either contains a different audio compression format or the AAC audio was compressed using incompatible settings. If by 'heading' you mean 'hearing,' then it may help-depending on the video player you are using on your 'PC.' As previously indicated, iOS and macOS devices expect MP4 files to contain AAC compressed audio. I can tell you there is no sound on my iPad nor iPhone, but there is no problem heading the audio on my PC. I am somewhat technologically proficient, but I do not know how to check which format of mp4 I am dealing with. If you're unable to do this, then post a sample file for download by others here for further examination. If it isn't, then you need to examine the file further.īasically, you need to open the file in your media player (or a media utility) and check the 'Inspector' or 'Media Information' window to ensure an audio track actually exists and, if so, what kind of audio data it contains. I.e., all 'normal' MP4 files should be audio playback compatible with any current (and most older) media players/devices. However, since you do not indicate how the the file was sourced/created or confirm what kind of data is actually stored in the file or which player/device/OS is being used for playback, it is impossible to know if the file actually contains an audio track or, if it does, say whether or not the audio is playback compatible. It is impossible to say for sure based on the information provided.Īn MP4 video file is normally expected to contain an MPEG4, AVC (H.264), or HEVC (H.265) video track along with an AAC audio track.

There is sound with other types of videos. When playing MP4 videos there is no sound.

Macbook pro mp4 no audio