How to convert an Image Sequence into a Video File in Blender?

If you’ve ever rendered an animation in Blender, you may have noticed that it typically outputs a series of individual images, called an image sequence, instead of a single video file. This may seem inconvenient at first, but image sequences actually give you more control over the final result because you can fix errors, adjust frames, or apply effects without having to re-render the entire animation. But how do you turn all those separate images into a smooth video file? Find out in this article with iRender!

When working with animation or visual effects in Blender, you might wonder why many professionals prefer to render an image sequence instead of exporting a video directly. The main advantage is reliability, because if something goes wrong during rendering, you won’t lose the entire animation, just the frames that are corrupted. This makes troubleshooting much easier and saves a lot of time. We also recommend rendering frame-by-frame when using the iRender render farm.

Another benefit is flexibility in post-production. With individual frames, you can easily edit colors, add effects, or fix errors on specific frames without having to re-render the entire sequence. This high level of control is essential for longer and more complex animations. Furthermore, image sequences also support a wider range of formats, from PNG to JPEG to EXR. So you have more choices in quality, transparency, and workflow compatibility.

Once you have your image sequence ready, it’s time to convert it into a video, which we’ll cover step by step in the next section.

Before importing your image sequence into Blender, it is important to organize your files properly. First is the filename. Blender reads sequences based on numbered files, so using a consistent format like frame_0001.png, frame_0002.png, etc. will help Blender automatically detect the sequence and avoid missing or out-of-order frames when you load everything into the Video Sequencer.

Second is the image format. Blender supports many popular image formats, including PNG, JPEG, EXR, and TIFF, so you can choose the format that best suits your workflow. For example, PNG is good for general use while EXR is preferred for high-quality or VFX-heavy projects.

Third, put all frames in a separate folder, avoiding mixing them with other assets to help Blender load the right file and not pick the wrong image. Finally, double-check the resolution and frame rate of your frames. All images should be the same size, and the sequence should match the frame rate you plan to use in your final video.

Start by launching Blender. By default, you’ll see 3D Viewpoint, but for this task, we need the Video Sequencer. At the top of the screen, open the Workspace tab and switch to Video Editing. If it’s not at the top, create a new workspace using the plus icon.

Next, to import a sequence of images, a single image, or even a video file, use the Add > Image/Sequence option above the video timeline. The file browser will open and navigate to the folder where your frames are stored.

Now, select all the images in the folder, and if they are numbered, Blender will be able to play them on the video timeline. Under Fit Method, select Original Size to get the exact aspect ratio and resolution of the original footage.

Before exporting, make sure your timeline is set up correctly. Blender needs to know how long your sequence is and at what speed it should play. Set the Frame Rate in the Output Properties panel > Scene Tab, with common choices being 24 fps, 30 fps, or 60 fps, depending on your project. You’ll also need to adjust the Start Frame and End Frame to match the length of your video sequence. For example, if you have 720 images, the End Frame should be 720.

Now it’s time to configure how Blender will render your final video. In the Output Properties panel, select the Output Folder where Blender will save your video file and give it a name. Under File Format, choose FFmpeg Video, then choose a Container (MPEG-4 will create an MP4 file). You can also set the video codec and quality in this section.

Once everything is in place, go to the top left corner and select Render > Render Animation, or press CTRL + F12. Blender will start stitching your frames together into a single video. You can see the progress in the Render window. When finished, open the output folder to check the final result.

If your images don’t fit the final output size, Blender will try to automatically scale them to fit the frame. This can result in clipping. If you don’t want this, use Crop and/or Offset in the Input panel to move and select an area of ​​the image in the output. When you use Crop or Offset, auto-scaling is disabled, and you can manually re-scale by adding a Transform effect.

In summary, converting image sequences into a video file in Blender is actually quite simple, even for beginners, so we hope this guide has been helpful. 

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References: versluis.com, docs.blender.org