---
title: "Discussion on \"Why won't this MP4 play? Containers, codecs, and how to fix the usual failures\" | Hashnode"
description: "Discussion on \"Why won't this MP4 play? Containers, codecs, and how to fix the usual failures\". \"It's an MP4, so it should play everywhere\" is one of the most common assumptions in video, and one of the most frequently wrong. An MP4 that plays perfectly on one phone can show a black screen in a"
url: "https://hashnode.com/posts/why-won-t-this-mp4-play-containers-codecs-and-how-to-fix-the-usual-failures/6af3590b9b9559c6617ea36f"
---

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# [Why won't this MP4 play? Containers, codecs, and how to fix the usual failures](https://mp4now.hashnode.dev/why-won-t-this-mp4-play-containers-codecs-and-how-to-fix-the-usual-failures?utm_source=hashnode&utm_medium=feed)

"It's an MP4, so it should play everywhere" is one of the most common assumptions in video, and one of the most frequently wrong. An MP4 that plays perfectly on one phone can show a black screen in a

2d ago · 6 min read · mp4now.hashnode.dev  
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-   [#codecs](https://hashnode.com/tag/codecs)

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