NVENC H.264 vs NVENC HEVC H.265 in OBS Studio

When streaming or recording in OBS Studio using an NVIDIA graphics card, choosing the right hardware encoder is crucial for balancing performance and visual quality. This article explains the key differences between NVENC H.264 and NVENC HEVC (H.265), comparing their compression efficiency, platform compatibility, and ideal use cases to help you choose the best settings for your setup.

Compression Efficiency and Video Quality

The primary difference between NVENC H.264 and NVENC HEVC (H.265) lies in compression efficiency. HEVC is a newer, more advanced codec designed to compress video much more effectively than the older H.264 standard.

• NVENC H.264: This is the legacy standard. It requires a higher bitrate to maintain a clear image, especially in fast-paced games with a lot of movement. At lower bitrates, H.264 is prone to pixelation and artifacting.
• NVENC HEVC (H.265): HEVC is roughly 50% more efficient than H.264. This means it can deliver the exact same visual quality as H.264 at half the bitrate, or significantly better visual quality at the same bitrate. It is highly effective at preserving fine details and reducing blockiness in high-motion scenes.

Streaming Platform Compatibility

While HEVC is technologically superior, compatibility issues dictate where you can actually use it for live streaming.

• Twitch: Twitch historically relied entirely on H.264. While Twitch is gradually rolling out support for modern codecs like HEVC and AV1 through features like Enhanced Broadcasting, H.264 remains the safest and most universally compatible option for streaming to Twitch.
• YouTube Live: YouTube fully supports HEVC for live streaming. If you stream to YouTube, using NVENC HEVC allows you to stream at higher resolutions (such as 1440p or 4K) using much lower bitrates than would be possible with H.264.

Local Recording Performance

For local video recording, compatibility with streaming ingestion servers is not a factor, making NVENC HEVC the clear winner for most users.

• File Sizes: Recording in HEVC produces significantly smaller file sizes without sacrificing video quality, saving valuable hard drive space.
• Editing Compatibility: Modern video editing software like DaVinci Resolve, Adobe Premiere Pro, and Final Cut Pro fully support HEVC files, making post-production seamless.

Hardware Impact

Both encoders utilize NVIDIA’s dedicated hardware encoder chip (NVENC), which is separate from the main graphics core used to render games.

Because the encoding workload is offloaded to this dedicated chip, choosing either H.264 or HEVC will result in virtually zero impact on your in-game frame rates. However, to use NVENC HEVC, you must have an NVIDIA GTX 900 series GPU or newer.

Summary: Which One Should You Choose?

• Choose NVENC H.264 if you are streaming to Twitch (unless you have access to Twitch’s beta enhanced encoding features) or if you need maximum compatibility with older media players and legacy editing software.
• Choose NVENC HEVC (H.265) if you are recording gameplay locally to your computer, or if you are streaming to YouTube, as it provides superior video quality and much smaller file sizes.