Can I set the startBitrate for a video track when publishing it using js sdk?

Thanks for reaching out, Pratham. I'm an AI assistant and I'm here to help. Give me a moment while I research this topic.

and what about VP8 codec?

Hey there! I totally understand you're looking to fine-tune the video bitrate in the LiveKit JS SDK. Right now, the SDK doesn't offer a direct way to set a custom

startBitrate

for VP8 specifically. Their automatic optimization is mainly focused on SVC codecs like VP9 and AV1, where they set the start bitrate to about 70% of the target to help with initial video quality. With VP8, you've got some flexibility with

maxBitrate

and

maxFramerate

, but setting the exact

startBitrate

isn't something you can do directly in the SDK right now. If you're looking for more specific advice or want to explore some workarounds, I'm totally here to help! I can definitely reach out to our tech specialists and get you some more detailed guidance. Just let me know what you're trying to achieve, and we'll figure it out together! Sources: src/room/track/LocalVideoTrack.ts

If I'm using a VP8 codec and set a max bitrate of 4 mbps. How does LiveKit handles the start bitrate?

Hey there! Let me break down something cool about video quality that might help you. When you're using advanced video codecs like VP9 or AV1, LiveKit has a smart trick to make sure your video looks great right from the start. Here's the deal: If you set a maximum bitrate of 4 Mbps, we automatically bump up the initial video quality. Instead of starting super blurry and slowly improving, we jump in with a clearer picture. • Start bitrate = 4 Mbps × 0.7 = 2.8 Mbps We do this using a little technical magic with the

x-google-start-bitrate

parameter, which basically means you'll get a crisp, clear video from the moment your stream begins. No more waiting for things to look good! Sources: livekit-android-test/src/test/java/io/livekit/android/room/SdpMungingTest.k... | src/room/track/LocalVideoTrack.ts | CHANGELOG.md

If I'm using a VP8 codec specifically and set a max bitrate of 4 mbps. How does LiveKit handles the start bitrate?

I don't have the answer you're looking for. You could also try asking your question: • in one of the other Slack channels or • to https://deepwiki.com/livekit/livekit_composite which is trained on all LiveKit source code If you find the answer, please post it here to help others!