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Youtube video and audio stutter after seeking.

Firefox mpo na Android Web compatibility
Ola Nordmann replied
Ola Nordmann
Ola Nordmann

Hi.

I suspect the problem is caused by Firefox's Gecko-based Android media stack.

Device:

Honor Magic V5 Snapdragon 8 Elite MagicOS 10.0.0.157

Software:

Firefox Android 152.0.6 uBlock Origin the only extension

Reproduction:

Open any YouTube video in Firefox. Play at 720p or higher. Pause/resume or seek. Audio and video begin intermittent stuttering. Switch to another app and return to Firefox and playback immediately returns to normal without reloading the site.

Comparison:

Chrome: works fine Vivaldi: works fine DuckDuckGo Browser: works fine

Things tested:

Hardware acceleration enabled. Battery optimization disabled. Performance mode enabled. Cache/history cleared. media.android-media-codec.preferred tested. gfx.webrender.software tested. AVC and VP9 both affected. Inner and outer displays affected. Desktop mode also affected. Firefox Nightly stutters even without seeking.

Hi. I suspect the problem is caused by Firefox's Gecko-based Android media stack. Device: Honor Magic V5 Snapdragon 8 Elite MagicOS 10.0.0.157 Software: Firefox Android 152.0.6 uBlock Origin the only extension Reproduction: Open any YouTube video in Firefox. Play at 720p or higher. Pause/resume or seek. Audio and video begin intermittent stuttering. Switch to another app and return to Firefox and playback immediately returns to normal without reloading the site. Comparison: Chrome: works fine Vivaldi: works fine DuckDuckGo Browser: works fine Things tested: Hardware acceleration enabled. Battery optimization disabled. Performance mode enabled. Cache/history cleared. media.android-media-codec.preferred tested. gfx.webrender.software tested. AVC and VP9 both affected. Inner and outer displays affected. Desktop mode also affected. Firefox Nightly stutters even without seeking.

All Replies (1)

Ola Nordmann
Ola Nordmann Nkolo motuna

Forgot to add in things tested:

Display Refresh rate set to 60Hz, 120Hz or dynamic.

Firefox's audio/video synchronization or rendering pipeline enters a bad state after seeking. After backgrounding Firefox it appears that Firefox rebinds the decoder and Audio/video sync is re-established. But how to prevent it from happening in the first place?

Tuna motuna

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