Debug preference for testing H.264/MPEG-4 AVC in Firefox for Android

Nightly for Android has recently adapted a new about:config preference for using and more-so testing Android H.264/MPEG-4 AVC decoding. The preference is media.stagefright.omxcodec.flags

Utimately, this preference allows one to override whether Firefox uses Android’s H.264/MPEG-4 AVC software or hardware decoder. As Chris Peterson mentions in the same announcement, this is useful for debugging different configurations and conveinent for testing.

Flags values to note:


  • 0 – Android will use either hardware or software decoding (default)
  • 8 – Force software decoding
  • 16 – Force hardware decoding


Reference: OMXCodec::CreationFlags

%d bloggers like this: