Software⏱️ 3 min read📅 2026-06-11

How to Fix: Error splitting the input into NAL units, corrupt video?

YouTube video download error due to AAC-LC audio codec issues.

Quick Answer: Try re-downloading the video with a different audio codec or using a different video player that supports AAC-LC.

📋 Table of Contents

  1. 🛑 Root Causes of the Error
  2. ✅ Best Solutions to Fix It
  3. 🎯 Final Words

Error splitting the input into NAL units, corrupt video

This error occurs when the downloaded video is not properly split into NAL (Network Abstraction Layer) units, leading to corrupted playback. This issue affects users who download videos using youtube-dl and attempt to play them.

🛑 Root Causes of the Error

  • The primary cause of this error is due to the video codec being used in the downloaded video not being properly handled by the NAL splitting process.
  • Another potential cause could be a problem with the video's audio or video settings, which may require manual adjustment before playback.

✅ Best Solutions to Fix It

Splitting the video into NAL units using FFmpeg

  1. Step 1: Open a terminal and navigate to the directory where the downloaded video is located.
  2. Step 2: Use the following command to split the video into NAL units: `ffmpeg -i input.mp4 -c:v h264_nal_unit_info -c:a copy output%03d.ts`
  3. Step 3: This will create a new file for each NAL unit, which can then be played individually without corruption.

Adjusting the video's audio or video settings manually

  1. Step 1: Open the downloaded video in a media player and adjust the audio settings to ensure that the sample rate index matches the container.
  2. Step 2: Additionally, check if there are any inconsistencies in the channel configuration and adjust accordingly.

🎯 Final Words

To resolve this issue, try splitting the video into NAL units using FFmpeg or adjusting the video's audio or video settings manually. If neither method works, consider seeking further assistance from a video editing software or a professional.

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