AV1 vs H.264 for PC Streaming and Recording

AV1 and H.264/AVC can both carry a PC game stream or recording, but they start from different practical positions. H.264 is the older, deeply established compatibility baseline. AV1 is a newer open codec designed for substantially more efficient internet video delivery. In a bandwidth-constrained stream, that efficiency can give an AV1 encoder more room to preserve detail; in a local recording, it can reduce the bitrate needed for a given quality target.

That is a codec-level direction, not a guaranteed quality percentage. The result still depends on the encoder implementation, preset, rate control, resolution, frame rate, content and hardware. A fast hardware AV1 encode should not be treated as automatically superior to every H.264 encode, and a codec name by itself is not a benchmark.

YouTube currently accepts H.264, HEVC and AV1 for RTMP/RTMPS live ingestion and publishes different recommended bitrate ranges by ingestion codec. OBS documents that its collaboration with YouTube added AV1 and HEVC streaming over Enhanced RTMP in OBS 29.1. That makes AV1 a real live-streaming path, not merely a local-recording format.

Do not generalize one platform to every destination. A service can support H.264 while rejecting AV1, support AV1 only through a particular protocol or application path, or change its ingest policy independently of OBS and GPU support. Check the current destination documentation before changing a production stream.

Hardware decode and hardware encode are separate capabilities. A PC that plays AV1 efficiently is not necessarily able to create AV1 in real time. NVIDIA introduced AV1 encoding in the GeForce RTX 40-series NVENC generation, while earlier RTX generations can have different AV1 capabilities. AMD lists AV1 encode and decode on current supported Radeon generations such as RX 7000-series products. Intel documents fixed-function AVC and AV1 encoding on current Xe-based media engines, while older generations have different codec matrices.

The application must expose that media engine too. Before planning around AV1, verify the exact GPU or iGPU generation, driver, operating system and capture application. H.264 remains easier to assume on older PC hardware precisely because hardware AVC encoding has existed for many more generations.

For browser real-time communication, H.264 Constrained Baseline is part of the mandatory WebRTC codec set documented by MDN alongside VP8. That is one example of how deeply AVC is embedded in interoperable software. AV1 support has expanded quickly, but old televisions, capture appliances, mobile devices, browsers, conferencing systems and editing tools cannot all be assumed to support it.

Compatibility also includes the exact profile, bit depth, chroma format and container, not just the codec label. If a recording must move between several editors, machines or archival tools, test the actual file through the whole workflow before committing a long session to a new format.

A local recording is not capped by internet upload in the same way as a live stream. You can often raise recording bitrate instead of changing codecs, provided storage throughput and capacity are sufficient. AV1 can still be valuable because more efficient compression can reduce file size or preserve more quality within a chosen storage budget, but the editing and playback path becomes the deciding constraint.

H.264 can therefore remain sensible for recordings that need maximum interchange compatibility even when the same PC has an AV1 encoder. Conversely, AV1 becomes more attractive when the complete capture, playback and editing chain supports it and storage efficiency matters. Neither choice is universally correct.

A bitrate recommendation belongs to a particular codec, resolution, frame rate, service and quality target. YouTube, for example, publishes separate live-ingest bitrate guidance for AV1/HEVC and H.264. That is evidence that the service expects the codecs to be configured differently, not a universal conversion formula that applies to every encoder or destination.

For streaming, start with the current service requirements and then use the encoder settings supported by your hardware and application. For recording, choose a quality or bitrate target appropriate to the footage and storage budget, make a representative test clip, and verify playback and editing before a long capture. The practical decision is end-to-end: encoder, network or disk, service or container, decoder, and editor all have to agree.