Troubleshooting
Video Render Taking Too Long or Looks Stuck? What Is Happening
Long videos are rendered in smaller chunks and combined at the end. A job can appear quiet while a chunk is processing, so learn what progress means before cancelling it.
Rendering a video is different from previewing it in the browser. The preview can play a composition immediately, while the final MP4 must render every frame, encode the video and then combine the rendered parts.
Why long videos take longer
Render time depends on video length, resolution, frame rate, media type and effects. A 10-minute 1080p documentary has far more frames to encode than a 20-second clip.
Why the render is split into chunks
Long projects are divided into smaller time ranges. Several chunks can be processed independently and then stitched into the final video. This helps large projects finish more reliably than trying to render the entire video as one huge task.
Preview time is not export time
Seeing a video play in the editor does not mean the final MP4 has already been encoded. Preview and export use different work. It is normal for a final render to take longer than watching the same video once.
Do not restart repeatedly
If a render is making progress, repeated cancellation and restart can waste the work already completed. Check the progress information first. If a job truly fails, read the error message before trying again.
What can make a render heavier
- 4K export instead of 1080p.
- Long source videos instead of still images.
- Many animated effects or transitions.
- Long voiceovers with many scenes.
- High-resolution source media that must be processed for the composition.
A sensible test when troubleshooting
- Try a short project with a few scenes.
- Use 1080p while testing.
- Confirm the short project previews correctly.
- Generate it and check the final MP4.
- Then move to the full project.