Video Plays Audio But No Video? Here's How to Tell Why

You open the file and the sound is perfect. The timeline moves. The audio is all there. But the picture is a black rectangle, or a flat green screen, or nothing at all.

Here is the good news, and it is genuinely good news: most of the time this is not a damaged file. It is your computer not knowing how to draw the picture. That takes two minutes to confirm, and the fix is usually free.

This guide shows you how to tell the difference before you start looking at repair tools you may not need.

The two-minute test

Do these two things first. Between them they identify nearly every case.

1. Open the file in VLC

VLC is free and carries its own decoders rather than depending on what your operating system happens to have. If VLC shows the picture, your file was never broken — your other player simply could not read it.

2. If VLC still shows no picture, check the file with MediaInfo

This is the step that actually answers the question, and almost nobody does it. MediaInfo is free, and it tells you what is genuinely inside the file.

Open your file with it and look at what it lists:

Whatever you do next, work on a copy. Some of the steps below rewrite the file. And if the file came off a camera card that is still in the camera, stop recording to that card — overwriting is the one kind of damage nobody can undo.

If the video track is there: free fixes

MediaInfo found a video track, so the picture exists. Now it is about getting something to draw it. Try these in order.

Turn off hardware acceleration

This is the single most common fix for a black or green picture with working audio, and it is the one most guides skip.

Your player normally asks the graphics card to decode video, because it is faster. When the graphics driver and the file disagree about something, you get sound and no picture. Making the player decode in software instead usually solves it instantly.

In VLC: Tools → Preferences → Input / Codecs → Hardware-accelerated decoding → Disable. Restart VLC and try again.

Install the missing codec

If the file came from a recent iPhone or a modern camera, the video is probably HEVC, also written H.265. Plenty of Windows machines cannot decode it out of the box. Newer files may use AV1, which is even less widely supported.

You can add support through the Microsoft Store, but honestly, VLC already handles all of these and costs nothing. Installing VLC is usually the faster answer.

Update your graphics driver

Worth doing if turning off hardware acceleration fixed the picture, because that tells you the driver was the problem. An up-to-date driver often lets you turn acceleration back on and keep the speed benefit.

Convert the file

If you need the file to work in software that will not cooperate — an editor, a phone, a TV — re-encode it into something universally supported. In VLC use Media → Convert/Save, or with FFmpeg:

ffmpeg -i input.mp4 -c:v libx264 -c:a aac output.mp4

This makes a new file with the picture re-encoded into H.264, which essentially everything can play. Note that this re-encodes rather than copies, so there is a small quality cost — but it only applies when the picture is genuinely there to begin with.

Why audio survives when video does not

If MediaInfo found audio only, it is worth understanding why, because it tells you how much hope there is.

Inside a video file, the picture and the sound are stored as two separate streams, chopped into small pieces and interleaved — a bit of video, a bit of audio, a bit of video, and so on all the way through the file.

The two streams are wildly different in size. Audio is small and simple; video is enormous by comparison and takes up almost all of the file. So when part of a file is lost, damaged, or only partially recovered from a memory card, the odds are heavily against the video and in favour of the audio. You end up with intact sound and a picture full of holes.

There is a second reason too. Video frames depend on each other — most frames only record what changed since the last one. Lose one key frame and everything that follows it has nothing to build on, so a small amount of damage can black out a long stretch of picture. Audio has no equivalent dependency, so it degrades far more gracefully.

When it is genuine damage

These are the situations where sound-without-picture really does mean the file is broken:

• The camera was interrupted mid-recording. Power loss, a crash, overheating, or the card being pulled. The file may also be missing its index entirely.
• The file came out of recovery software. Recovery tools frequently return files where the audio reassembled correctly and the video did not. This is extremely common and does not mean the recovery failed.
• A transfer was interrupted. Copying from a card, a phone or a cloud service that stopped part way through.
• The card was faulty. Failing flash memory produces unreadable areas scattered through the file.

In all of these the remaining picture data is often still inside the file. What is missing is the structure that tells a player where the frames are and how to decode them, and that can be rebuilt.

What manual repair does

Manual repair means a person opens the file in a hex editor, reads its actual byte structure, and rebuilds what is missing from what the surrounding data shows should be there. For a file with sound but no picture, that usually means:

• Finding where the video frames actually start and end, and rebuilding the index around them
• Identifying which parts of the video stream survived and recovering those rather than declaring the whole file a loss
• Rebuilding the link between the video and audio streams so they play together again
• Putting fragmented pieces back into the correct order
• Handling formats consumer tools do not recognise

Automated repair tools generally cannot do this, because they work by copying the index from a healthy clip shot on the same camera with the same settings. If you do not have such a clip, they have nothing to work from. Reading the structure by hand does not need a reference file.

What cannot be recovered

• Video data that was overwritten. If something was recorded over it, it is gone. No tool and no person can bring it back.
• A file where no picture was ever written. If the camera failed before writing a single frame, there is nothing inside to recover.
• Physically damaged cards or drives. Cracked, bent or water-damaged media needs a data recovery lab with a cleanroom — a different trade from file repair.

If your file falls into one of these, an honest answer now saves you money and time.

How it works

1. Upload the file and send us the link. Google Drive, Dropbox or WeTransfer all work. Email the link to cornmonster2018@gmail.com and tell us what device it came from and which players you already tried.
2. We assess it at no charge. We open the file, look at its real structure, and work out how much of the picture is still there.
3. You get a straight answer within 48 hours. Either the picture can be brought back and we send you a quote, or it cannot and we tell you exactly why. If we cannot recover it, you pay nothing.
4. You decide. Nothing proceeds until you approve the quote.

Your files are never shared with anyone, and our working copies are deleted after the job is finished. Our privacy policy has the full detail.

Frequently asked questions

Why does my video have sound but no picture?

In most cases your player can read the audio but not the video, because the video is encoded with something it does not support. The file is fine. Open it in VLC first, because VLC brings its own decoders instead of relying on what your computer has installed.

How do I know whether the video track is really missing?

Install MediaInfo, which is free, and open the file with it. If it lists a video track alongside the audio track, the picture is in the file and your player is the problem. If it lists audio only, the video data really is missing or damaged and the file needs repair.

Why is my video green or pink instead of black?

A green, pink or purple picture usually means the player is decoding the file but the graphics card is mishandling it. Turning off hardware acceleration in your player settings fixes this in most cases. If the colours persist in every player, the frames themselves are damaged.

My recovered video has audio but no picture. Is it lost?

Not necessarily. Audio and video are stored as separate streams inside the file, and audio is far smaller, so it often survives when video does not. Whether the picture can be brought back depends on how much of the video data is still present, which is what an assessment determines.

Can I fix a video with no picture by converting it?

Converting helps when the problem is a codec your software cannot read, because it re-encodes the picture into something more common. It cannot help when the video data is missing, because there is nothing there to convert. Test with MediaInfo first so you know which situation you are in.

How do I send you a video with no picture for assessment?

Upload it to Google Drive, Dropbox or WeTransfer and email us the link at cornmonster2018@gmail.com. Tell us what device it came from and which players you already tried. We reply within 48 hours with an honest answer, and there is no charge unless you approve a quote.

Stopping it happening again

• Keep VLC installed — it removes the codec problem permanently
• Set an iPhone to Settings → Camera → Formats → Most Compatible if you share footage with Windows users
• Never pull a card or battery while the record light is on
• Let a transfer finish completely before disconnecting a card, phone or drive
• Copy footage off the card the same day and keep a second copy elsewhere
• Retire a memory card as soon as it starts producing glitchy clips