What Is Frame Blocking in Video Editing?

Have you ever watched a video where the frame seems to freeze or stutter for a brief moment? That’s called frame blocking, and it’s a common issue in video editing. In this article, we’ll dive into what frame blocking is, what causes it, and how you can prevent it.

What is Frame Blocking?

Frame blocking occurs when a video frame takes longer to load than the playback time of the clip. As a result, the video appears to stutter or freeze for a brief moment, disrupting the smooth flow of the footage. This can be frustrating for viewers and can make your video look unprofessional.

What Causes Frame Blocking?

There are several factors that can cause frame blocking in your videos. Some of these include:

  • High Bitrate: If your video has a high bitrate, it can take longer to load each frame, leading to frame blocking.
  • Slow Hard Drive: A slow hard drive can cause delays in loading frames and lead to frame blocking.
  • Complex Effects: If you’ve added complex effects like color grading or motion graphics to your footage, it can increase the load time of each frame.
  • Inefficient Encoding: If your video is not encoded efficiently, it can lead to delays in loading frames.

How Can You Prevent Frame Blocking?

Preventing frame blocking requires careful planning and attention to detail. Here are some tips to help you avoid this issue:

1. Optimize Your Settings

Before you start editing your footage, make sure that your settings are optimized for editing. This means using lower resolution proxies while editing and rendering out at higher resolutions when you’re done.

2. Use Efficient Codecs

Using efficient codecs like H.264 or H.265 can help reduce the load time of each frame.

3. Avoid Complex Effects

While effects can add visual interest to your footage, using too many complex effects can cause frame blocking. Try to keep your effects simple and use them sparingly.

4. Use a Fast Hard Drive

Using a fast hard drive can help reduce the load time of each frame, making it less likely that you’ll experience frame blocking.

5. Test Your Footage

Before exporting your final video, make sure to test it thoroughly for any issues like frame blocking. This will give you a chance to fix any issues before your viewers see them.


Frame blocking can be an annoying issue in video editing, but with careful planning and attention to detail, you can prevent it from happening in your videos. By optimizing your settings, using efficient codecs, avoiding complex effects, using a fast hard drive, and testing your footage thoroughly, you’ll be able to create smooth and professional-looking videos that keep viewers engaged from start to finish.