How to Download Reddit Video With Sound (The Audio Problem Fixed)
Reddit videos download without sound because Reddit serves video and audio as separate DASH streams. Here is exactly why, and the simplest free fix.
Reddit video downloads with no sound is the single most-asked question in r/help and r/Save3rdPartyApps. The reason is technical, not a bug, and once you understand it the fix is one click.
Why Reddit videos are silent when you download them
Reddit moved to DASH (Dynamic Adaptive Streaming over HTTP) several years ago. Under DASH, a video is split into two separate HTTP-served files: one for the video track and one for the audio track. Your browser or the Reddit app stitches them together on the fly as you watch.
When a basic downloader fetches a Reddit post, it usually grabs only one URL, the one Reddit calls "fallback_url" in its JSON response. That URL points to the video track only. The audio file lives at a parallel URL named DASH_AUDIO_128.mp4 (high quality), DASH_AUDIO_64.mp4 (lower quality), or DASH_audio.mp4 (legacy posts). Most quick tools never look at those.
So you end up with what looks like a working MP4 video but with no sound. Not a bug in your phone, not your settings, the audio file is just missing from your download.
How our Reddit Video Downloader fixes it
Open our Reddit Video Downloader, paste the Reddit post URL (works with both reddit.com/r/... and v.redd.it/... links), and press Download. The tool reads Reddit's JSON metadata, finds both the video and the audio streams, then returns both download links to you.
You can either:
- Download both files and play them with VLC or any player that supports external audio
- Quickly merge them into a single MP4 with audio embedded (instructions below)
Three free ways to merge the Reddit video and audio into one MP4
Option 1, CapCut (recommended for mobile and non-technical users)
Open CapCut, tap New Project, import the video file. Then tap the Audio menu and import the audio file. Trim them to match if needed (they should already be exact length). Export at 1080p, you get a single MP4 with sound. Free, no signup needed, available on iPhone, Android, Windows and Mac.
Option 2, VLC Media Player
VLC can mux files for you. Media menu → Convert / Save → Add the video file → check Show More Options → Play another media synchronously → add the audio file. Choose Convert / Save, pick MP4 as the output format, hit Start. You get a single MP4. Free on every platform.
Option 3, ffmpeg (one line for power users)
If you have ffmpeg installed, this is the fastest path:
ffmpeg -i video.mp4 -i audio.mp4 -c:v copy -c:a aac output.mp4
This re-encodes only the audio to AAC (which iPhone and most modern devices prefer) and keeps the video stream as-is, so quality is identical to the source.
When the audio file genuinely does not exist
Some Reddit posts are uploaded without audio originally, particularly old r/aww or r/gifs posts that were converted from GIF. If our downloader returns the video link but no audio link, the original post never had audio in the first place. Adding any other free downloader will give you the same result.
Quick reference, common DASH audio paths
For a video URL like https://v.redd.it/abcdef123/DASH_480.mp4?source=fallback, the audio file is one of:
https://v.redd.it/abcdef123/DASH_AUDIO_128.mp4(best quality, modern posts)https://v.redd.it/abcdef123/DASH_AUDIO_64.mp4(lower quality, modern posts)https://v.redd.it/abcdef123/DASH_audio.mp4(legacy posts, older naming)
Our downloader probes all three and surfaces whichever one exists.
TL;DR
Reddit videos do not actually come with no sound, the audio is just stored in a separate file. Our Reddit Video Downloader with sound finds it and gives it to you in one paste-and-download, no signup, no app install.
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Frequently asked questions
Why do Reddit videos download with no sound?
Reddit serves videos using DASH (Dynamic Adaptive Streaming over HTTP). The video track and audio track are two separate files on Reddit's CDN. Most basic downloaders only grab the video stream (fallback_url), so you end up with a silent file. The audio file is at a parallel URL (DASH_AUDIO_128.mp4 or DASH_audio.mp4).
What is the easiest way to download Reddit video with sound?
Paste the Reddit post URL into our Reddit Video Downloader. It detects the audio stream automatically and gives you both the video and audio files. Either keep them separate, or merge into one MP4 using CapCut, VLC or ffmpeg in under a minute.
How do I merge the Reddit video and audio into one MP4?
Easiest free options: CapCut (mobile or desktop, drag both files in and export), VLC (Media menu → Open Multiple Files → add both → Convert / Save), or ffmpeg one-liner: ffmpeg -i video.mp4 -i audio.mp4 -c:v copy -c:a aac out.mp4. CapCut is best for non-technical users.
Does every Reddit video have audio?
No. Some Reddit videos are uploaded without audio originally. If our downloader returns only the video stream (no audio link), it means the original post has no audio track.
Why do some apps download Reddit video with sound automatically?
They run their own server-side merging step (ffmpeg) before sending you the file. We can do the same but it is slower and uses more bandwidth. Returning separate streams is faster and gives you the option to keep the original quality untouched.