So this will either depend on the embedded video player of the page, if it is the HTML5 player I actually do not know if you need to specify the codec: https://developer.mozilla.org/en-US/d.../Using_HTML5_audio_and_video

• https://support.mozilla.org/en-US/kb/fix-common-audio-and-video-issues

See also:

• https://developer.mozilla.org/en-US/docs/Web/HTML/Supported_media_formats

I am trying to embed a audio file in web page which is recorded using the Android phone. When i directly open the file in Firefox is works but when i try with audio tag it doesn't. Note: same web page is working in IE.

Below are the Media details -

   "format": {
       "filename": "..\\AUDIO_20151105_111335.m4a",
       "nb_streams": 1,
       "nb_programs": 0,
       "format_name": "mov,mp4,m4a,3gp,3g2,mj2",
       "format_long_name": "QuickTime / MOV",
       "start_time": "0.000000",
       "duration": "5.550000",
       "size": "94681",
       "bit_rate": "136477",
       "probe_score": 100,
       "tags": {
           "major_brand": "isom",
           "minor_version": "0",
           "compatible_brands": "isom3gp4",
           "creation_time": "2015-11-05 05:43:41"
       }
   } 

I also tried with other m4a file which works, details are which is below -

"format": {

       "filename": "..\\TSP-01-Cro_magnon_man.m4a",
       "nb_streams": 1,
       "nb_programs": 0,
       "format_name": "mov,mp4,m4a,3gp,3g2,mj2",
       "format_long_name": "QuickTime / MOV",
       "start_time": "0.023220",
       "duration": "267.716956",
       "size": "4332710",
       "bit_rate": "129471",
       "probe_score": 100,
       "tags": {
           "major_brand": "mp42",
           "minor_version": "0",
           "compatible_brands": "mp42isom",
           "creation_time": "2011-08-21 19:38:09"
       }
   }

}

The visible difference is in the major and compatible brands.