Add and edit audio files to any MP4 file in just a few clicks. Edit videos and add voiceovers, music, sound effects, or whatever audio you want.
Adding MP3 audio to your MP4 video clip is MPsimple. Follow this step-by-step process to add music, voiceover, or other sound effects to your clip.
Drag and drop your MP4 video file into a Descript project. Wait a few seconds while Descript generates a transcript where you can make edits to your video by changing the transcript just like you would a doc.
With your MP4 and transcript in Descript, select the music track, voiceover, background music, or other audio file you want to add to your MP4, and drag it to the place in the transcript where you want it to play. You can also highlight sections of your transcript to add an audio layer to by right-clicking and choosing Add layer to add your own audio or stock audio from our built-in media library.
Play it back and adjust the timing and volume as needed by selecting the audio layer in the timeline. Then go to Publish to export your final MP4 with its new audio. You can export directly to YouTube in a few clicks, or save it on your computer to upload to Instagram, TikTok, or wherever you want to share it.
Descript is able to work with a wide range of encoding formats. For video, Descript works with MP4, avi, mov, mkv, wmv, wma, and others. Descript also works with a number of audio formats, including aac, mp3, wav, and more.
Video projects created and published using Descript’s Creator and Pro plans export completely watermark-free. Projects exported using Descript’s Free plan carry a watermark.
Descript can import and edit video formats all the way up to 4K. Descript users are able to import video files of all types and edit them directly in Descript, including adding new audio. If you’re exporting your video file, Descript’s Creator and Pro versions can export your video at any resolution, while Descript’s Free plan exports files up to 720p.
Descript provides a number of ways to publish your new video creation through a number of output formats. Your video can be uploaded directly to YouTube, or exported as an MP4 file, perfect for upload to Google Drive, Dropbox, or playing in players like iTunes or VLC media player. Descript can also turn your creation into a GIF.
Add and edit audio files to any MP4 file in just a few clicks. Edit videos and add voiceovers, music, sound effects, or whatever audio you want.
Drag and drop your MP4 video file into a Descript project. Wait a few seconds while Descript generates a transcript where you can make edits to your video by changing the transcript just like you would a doc.
With your MP4 and transcript in Descript, select the music track, voiceover, background music, or other audio file you want to add to your MP4, and drag it to the place in the transcript where you want it to play. You can also highlight sections of your transcript to add an audio layer to by right-clicking and choosing Add layer to add your own audio or stock audio from our built-in media library.
Play it back and adjust the timing and volume as needed by selecting the audio layer in the timeline. Then go to Publish to export your final MP4 with its new audio. You can export directly to YouTube in a few clicks, or save it on your computer to upload to Instagram, TikTok, or wherever you want to share it.
Descript not only makes adding MP3 files to MP4 videos effortless, but also works with WAV, MP3, AAC, AIFF, M4A, or FLAC formats. Want to add audio or music to something besides an MP4? You can do that too with support for MOV, GIF, MPEG, and more.
Whether it's adding music to a video, converting MP3 to MP4, or enhancing voice quality, our AI-driven tools remove background noise and enrich sound, making your videos more engaging. Perfect for creators aiming to produce professional-grade content without the professional studio costs.
Add background music and sound effects to your MP4s from our extensive stock media library, or generate voice overs with text-to-speech and voice cloning. It's as easy as highlighting the transcript and clicking.
You can add an MP3 to an MP4 file in Descript by adding your video to a Descript project, highlighting sections where you want to add your MP3, and adding or pasting it in on the spot. If needed, use the editing tools to trim, adjust, or align the audio or video layers. Once you're happy with the result, export your project, and voilà! Your new MP4 file is ready for sharing or further production.
To add voice audio to an MP4 file, you can either upload an existing voice recording to a project with your MP4 video, record your own voice directly into your project, or generate text-to-speech audio based on a script using a stock AI voice or voice clone.
Adding music to an MP4 file in Descript can be done by dragging and dropping your music file (MP3, WAV, or another supported file type) into the timeline and positioning it alongside your MP4, or choosing a track from our built-in stock music library. You can adjust the music track's length, volume, and transitions to fit your video perfectly. If needed, use the split and delete functions to tailor the audio precisely.
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