---
title: "#codecs articles | Hashnode"
description: "Explore 2 articles tagged #codecs on Hashnode. Tutorials, guides, and how-tos from the community."
url: "https://hashnode.com/tag/codecs"
---

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# #codecs

2 posts · 0 followers

[mp4.now](https://hashnode.com/@mp4now) · [2d ago](https://hashnode.com/posts/why-won-t-this-mp4-play-containers-codecs-and-how-to-fix-the-usual-failures/6af3590b9b9559c6617ea36f)

### [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

6 min read · [mp4now.hashnode.dev](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)

[Aditya Singh](https://hashnode.com/@adii104) · [Sep 13](https://hashnode.com/posts/i-tried-to-glue-mp3s-together-and-ffmpeg-humbled-me/6aa6f864796049318582f4ca)

### [I Tried to Glue MP3s Together and FFmpeg Humbled Me](https://adi-read-write.hashnode.dev/i-tried-to-glue-mp3s-together-and-ffmpeg-humbled-me?utm_source=hashnode&utm_medium=feed)

Why concatenating MP3 files causes glitches, how FFmpeg's decode → encode pipeline actually works, and what codecs and containers really are.

7 min read · [adi-read-write.hashnode.dev](https://adi-read-write.hashnode.dev/i-tried-to-glue-mp3s-together-and-ffmpeg-humbled-me?utm_source=hashnode&utm_medium=feed)