topic Audio-Video lag and desync when paying H.264 (AVC) on Chromecast with Google TV HD and 4K. in Streaming

Audio-Video lag and desync when paying H.264 (AVC) on Chromecast with Google TV HD and 4K.

AlxD — Sun, 30 Mar 2025 11:34:05 GMT

According to developers.google specs, the Chromecast with Google TV must support H.264 High Profile up to level 5.1 (4Kx2K/30fps) but when I try to play an AVC, High Profile 4, 8 bit it fails lamentably with lots of video lagging and audio desync.

The video file is stored locally in the Chromecast's memory and the playback was attempted using VLC and Kodi, both installed from the Official App Store.

The failing devices are:

Chromecast with Google TV HD - Android 12, STTL.241013.003, kernel 5.4.259
Chromecast with Google TV 4K - Android 14, UTTC.241218.004.12950887, kernel 5.15.153

This playback was working some time ago but something broke H.264 video decoding. Taking into account that two different devices, that should play this video perfectly, have the same issues, I suspect that it has to do with @Google.

Questions:

what is the cause this is happening all of a sudden?
why this started happening also for android 12 & 14 on Chromecast with Android TV?
why H.264 hardware support is broken for these devices that I have paid for to have this specific feature?
how will google fix this?

Google official specs & my test video file details:

Re: Audio-Video lag and desync when paying H.264 (AVC) on Chromecast with Google TV HD and 4K.

GabrielaG — Mon, 31 Mar 2025 23:43:49 GMT

Hi @AlxD,

Thanks for reaching out to the Google Nest community. I'm sorry to hear that your Chromecast is not working as expected. I'm happy to help you right now.

I'd like to ask you a few questions in order to gather more information about the concern and find the best way to fix it.

What Chromecast device do you have?
Are you using an Android or iOS device?
Please make sure the Google Home app is fully updated.
Did you reset the Chromecast device and restart your phone?

Any additional details you can provide will be helpful.

Best regards,

Gabriela

Re: Audio-Video lag and desync when paying H.264 (AVC) on Chromecast with Google TV HD and 4K.

AlxD — Tue, 01 Apr 2025 06:14:18 GMT

Hello, all the details are already in the initial message. There are two failing Chromecasts with google TV with the specifics from the message and I am not using the home app, I am trying to play a file directly from the device’s internal memory. Thanks!

Re: Audio-Video lag and desync when paying H.264 (AVC) on Chromecast with Google TV HD and 4K.

Andyfahc — Thu, 03 Apr 2025 02:41:38 GMT

I got exactly same problem after latest update on Chromecast with Google tv 4k. Everything in HD or over I try to play stutters and lags. Even GeForce now doesn't work now. Had absolutely no problems before firmware update. Thanks for breaking my device google.

Please fix this

Re: Audio-Video lag and desync when paying H.264 (AVC) on Chromecast with Google TV HD and 4K.

AdamKa — Thu, 03 Apr 2025 08:47:55 GMT

I think the topic should be merged with the existing one https://www.googlenestcommunity.com/t5/Streaming/CCwGTV-4K-update-to-Android-14-broke-TV-stream-playback/m-p/706481

Re: Audio-Video lag and desync when paying H.264 (AVC) on Chromecast with Google TV HD and 4K.

AlxD — Fri, 04 Apr 2025 15:45:38 GMT

about your post: do I expect also an answer to my questions? thanks!

Re: Audio-Video lag and desync when paying H.264 (AVC) on Chromecast with Google TV HD and 4K.

NautilusX — Sat, 12 Apr 2025 09:20:39 GMT

I have Google Streamer and I have noticed that content using H.264 works very poorly.
The image freezes and only the sound is audible.
Is there a chance to fix this defect in the new Google equipment?

Re: Audio-Video lag and desync when paying H.264 (AVC) on Chromecast with Google TV HD and 4K.

Blazter — Tue, 15 Apr 2025 19:41:45 GMT

I have the sam problem, its so annoying....

Re: Audio-Video lag and desync when paying H.264 (AVC) on Chromecast with Google TV HD and 4K.

Andyfahc — Mon, 12 May 2025 11:12:18 GMT

Google. Please give us something. At least acknowledge you're aware of the problem and working on a fix. Thats the least you could do. Thanks 🙏

Re: Audio-Video lag and desync when paying H.264 (AVC) on Chromecast with Google TV HD and 4K.

NautilusX — Wed, 14 May 2025 15:56:03 GMT

Most of all, I can't believe that such a large company is so blind and doesn't see what we write.