Why exporting a video is slow, and how hardware encoding speeds it up
Most of an export’s time goes into encoding: compressing every frame into H.264 or a similar format. Nearly every computer made in the last ten years has a chip that does that far faster than the processor can, and a video editor that uses it exports in a fraction of the time.
15 October 2026 · 4 min read
Where the time goes
Exporting does three things to every frame: it decodes the source clips, draws the frame with its titles, transitions and effects, and encodes the result. For an ordinary edit, the encoding is the heaviest part. H.264, the format almost every MP4 uses, compresses well because it searches each frame for movement from the frames around it, and done by the processor alone that search is slow.
The encoder already in your computer
Graphics chips, and the graphics built into most processors, include a separate encoder made for exactly this job:
- Intel Quick Sync Video, in most Intel processors with built-in graphics.
- NVIDIA NVENC, in NVIDIA graphics cards.
- AMD’s encoder (AMF), in AMD graphics cards and Ryzen processors with built-in graphics.
A hardware encoder is several times faster than encoding in software, and it leaves the processor free. The trade is small: at the same quality its files tend to be a little larger than a slow, careful software encode. For a video going to YouTube, a meeting or a social network, the difference is rarely worth the wait.
Turning it on
Many editors have a setting for it, often off or on automatic:
- HandBrake offers encoders named for the hardware, such as H.264 (Intel QSV) or H.264 (NVENC), in its Video tab.
- Shotcut has a “Use hardware encoder” box on its Export panel.
- Adobe Premiere Pro has an encoding setting of Hardware Encoding in its export settings.
If the option is missing or fails, update the graphics driver first; hardware encoding depends on it. A laptop on battery may also slow its graphics chip down, so export plugged in.
Other ways to shorten an export
- Export at the frame size and frame rate of your sources. Scaling up costs time and adds nothing.
- Effects that blur, stabilise or reduce noise are slow on every frame; apply them only where needed.
- Keep sources on a fast internal drive rather than a USB stick or network folder.
Our own product, disclosed
Where our own software comes into this
We make Rutba Office, a free desktop suite for Windows whose Video app edits, records the screen and makes introduction videos. Since version 2.1 its export encodes the picture and sound with the computer’s own hardware, as H.264 and AAC, and writes the MP4 itself as the frames are made. A one-minute 1080p timeline exports in about 28 seconds on our reference laptop, around twice as fast as real time. On a computer without the codec it falls back to exporting in real time by itself, with nothing to set.
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