Misc options
Platform Specific Issues
Newly Added Parameters

&codec

Sets the codec to encode the video.

Options

Value

Description

h264

request the h264 codec

vp8

request the VP8 codec

vp9

request the VP9 codec

av1

request the AV1 codec

Details

H264

H264 may offer hardware encoding for better battery life with mobile and embedded devices

iOS devices should generally use H264, but the max resolution supported then is 1280x720.

macOS systems generally prefer H264 and will sometimes hardware-encode.

As for Windows PCs, if using a Chromium-based browsers (Chrome/Edge), your system may choose to use hardware-encoding when using publishing via a H264. This typically happens at 360p or higher resolutions, but it may not always happen. You can check to see if you are hardware-encoding by checking your video out stats, via CTRL + Clicking on your video: "External Encoder" would likely indicate hardware acceleration of some sort. If you have an Nvidia graphics card, you may be limited to two or three H264 hardware encoders, which could cause problems if you intend to use NVEnc for RTMP streaming also.

VP8

VP8 is the default in most cases, even though Apple devices may default to H264.

OBS on PC does not handle packet loss well when using VP8.

The Electron Capture app handles VP8 very well.

iOS devices can stream at 1080p30 or 720p60 when using VP8, but they get warm in doing so

VP9

VP9 offers better compression than VP8, but is also more CPU-intensive to use.

VP9 seems to reduce the chance of "rainbow puke" video problems in OBS Studio vs VP8

Do not feel compelled to stream at HD resolutions; even 540p can look good and runs much cooler.

AV1

AV1 is the most advanced codec, but also the most CPU-intensive to use.

Requires Chrome v90 or newer on both publisher and viewer to work

Experimental at this point in time; may not perform well.