packages/docs/docs/troubleshooting/video-has-no-sound.mdx
If you rendered a video with Remotion and it appears to have no audio, the most common cause is that you are playing it back in an editor that mutes video by default.
VS Code and Cursor have a built-in video player that plays videos muted by default. There is no unmute button.
To verify your video has audio, open it in a dedicated media player instead:
You can right-click the file in VS Code or Cursor and select "Reveal in Finder" (macOS) or "Reveal in File Explorer" (Windows) to locate it, then open it with a proper media player.
If the video still has no sound after opening it in a media player:
Make sure your Remotion composition includes an audio source. You can add audio using <Audio>, or extract audio from a video using <Html5Video> or <OffthreadVideo>.
Check that you have not set the volume prop to 0 on your audio or video tags.
If you are using a <Sequence>, make sure the audio component is mounted during the time range you expect. Audio that is not mounted will not be included in the output.