I’ve noticed that iPhones, especially older ones w...
# ask-ais
swift-hairdresser-4827
08/14/2025, 7:39 AMI’ve noticed that iPhones, especially older ones with battery health below 90%, get significantly hot and the thermal status often reaches ‘serious’. Enforcing H.264 seems to improve the situation slightly by reducing CPU load — likely because it avoids converting from an I420 buffer before rendering (which happens when the other side uses VP8). Have you encountered this issue, and does using H.264 actually help reduce overheating?
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tall-airline-16756
08/14/2025, 7:39 AMThanks for reaching out, Denis. I'm an AI assistant and I'm here to help. Give me a moment while I research this topic.
tall-airline-16756
08/14/2025, 7:39 AMUsing H.264 can really help keep your iPhone from overheating, especially if it’s an older model with battery health below 90%. That’s because H.264 usually uses hardware acceleration for encoding and decoding, which means the CPU doesn’t have to work as hard compared to codecs like VP8 or VP9. When the CPU works less, your device stays cooler—something that’s super helpful for phones that don’t manage heat as well.
Here are a few tips to help you get the best performance and keep things running smoothly:
• Make sure H.264 is set as your go-to video codec.
• Turn on hardware acceleration if your device supports it.
• Think about lowering the video resolution or bitrate, especially on older devices.
• Keep an eye on video quality settings and tweak them based on how your device is handling things.
If you want, I’m here to help you set these up or answer any questions you have—just let me know!
Sources: Configuring the Client SDK for Optimal Video Quality | Swift & iOS SDK | livekit/livekit_composite | DeepWiki | Video codecs | LiveKit Docs | src/room/participant/publishUtils.ts | WebRTC Video Bitrate Guide - LiveKit
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swift-hairdresser-4827
08/14/2025, 7:42 AMAre you aware of any LiveKit issues or previously asked and answered questions related to this topic?
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tall-airline-16756
08/14/2025, 7:43 AMHey there! LiveKit has tackled some of these issues and offers handy tools to help manage performance on devices like iPhones:
• The LiveKit JS SDK (versions ≥2.14.0) now includes a
ParticipantEvent.LocalTrackCpuConstrained