1348734 - Youtube sound not working

Status: RESOLVED DUPLICATE of bug 1348432

(Firefox :: Untriaged, defect)

Description

[Winson Wen]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.79 Safari/537.36 Edge/14.14393

Steps to reproduce:

Open firefox.
Play any YouTube video (e.g. https://www.youtube.com/watch?v=fJ9rUzIMcZQ)


Actual results:

Video plays without sound. Sound indicator on tab shows. Sound in pre-roll ad works.


Expected results:

Video plays with sound.

Comment 1

[Winson Wen]

Mozregression-gui output:
pushlog_url: https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=23a4b7430dd7e83a2809bf3dc41471f154301eda&tochange=e1576dd8bd9d3a4ca418cf347133b8a4957ddeca
repo_name: mozilla-central

It 404s before it can finish with url https://hg.mozilla.org/integration/fx-team/json-pushes?changeset=22d67a28c77bf0c83afb0a56e31e1db550944ffb&full=1

Comment 2

[Michal Kluka]

I am seeing this too. Interestingly, when I open the first video it will play with sound. When I click on any of suggested videos they will play without sound. If I let them auto play they will play with sound! Also navigating away from youtube (bookmark or url on address bar) and then returning back (back button) will fix the issue.


Name: Firefox
Version: 55.0a1
Build ID: 20170319030203
Update Channel: nightly
User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:55.0) Gecko/20100101 Firefox/55.0
OS: Windows_NT 10.0
Multiprocess Windows: 1/1 (Enabled by default)


below debug string from youtube html5 player:

{
  "ns": "yt",
  "el": "detailpage",
  "cpn": "ig-1ytjxwZ5k8lu5",
  "docid": "rY0WxgSXdEE",
  "ver": 2,
  "referrer": "https://www.youtube.com/watch?v=kijpcUv-b8M",
  "cmt": "5.862",
  "plid": "AAVLJUDvim0KFKKr",
  "ei": "spHPWIWILNqS1gKMtb3QDA",
  "fmt": "134",
  "fs": "0",
  "rt": "6.58",
  "of": "Zeofp9u_BwiclVhCRbZoUQ",
  "euri": "",
  "lact": 3,
  "cl": "150585319",
  "mos": 0,
  "state": "8",
  "vm": "CAIQARgB",
  "volume": 100,
  "c": "WEB",
  "cver": "1.20170316",
  "cplayer": "UNIPLAYER",
  "cbr": "Firefox",
  "cbrver": "55.0",
  "cos": "Windows",
  "cosver": "10.0",
  "hl": "en_US",
  "cr": "CZ",
  "len": "222.621",
  "fexp": "9405967,9419452,9422596,9425078,9428398,9431012,9433221,9434046,9434289,9438967,9445878,9446054,9446364,9449034,9449243,9450059,9450258,9450470,9451174,9456640,9457141,9457781,9458230,9459935,9459986,9460160,9461246,9461560,9461757,9463496,9463583,9463594,9463928,9463965,9464097,9465025,9465185,9465533,9465651,9465927,9466750,9466793,9466868,9466961",
  "feature": "autonav",
  "afmt": "251",
  "vct": "5.862",
  "vd": "222.621",
  "vpl": "0.000-7.214,",
  "vbu": "0.000-48.000,",
  "vpa": false,
  "vsk": false,
  "ven": false,
  "vpr": 1,
  "vrs": 4,
  "vns": 2,
  "vec": null,
  "vvol": 1,
  "lct": "5.618",
  "lsk": false,
  "lmf": false,
  "lbw": "2276623.746",
  "lhd": "0.061",
  "lst": "0.000",
  "laa": "itag=251,seg=4,range=556108-714164,time=40.0-50.0",
  "lva": "itag=134,seg=9,range=1276446-1502062,time=43.0-48.0",
  "lar": "itag=251,seg=5,range=714165-876520,time=50.0-60.0",
  "lvr": "itag=134,seg=9,range=1276446-1502062,time=43.0-48.0",
  "lvh": "r8---sn-2gb7ln7d",
  "lab": "0.000-50.001,",
  "lvb": "0.000-48.000,",
  "ismb": 11260000,
  "relative_loudness": "-2.489",
  "debug_videoId": "rY0WxgSXdEE",
  "0sz": false,
  "op": "1",
  "yof": false,
  "dis": "",
  "gpu": "ANGLE_(Intel(R)_HD_Graphics_3000_Direct3D11_vs_4_1_ps_4_1)",
  "cgr": true,
  "debug_playbackQuality": "medium",
  "debug_date": "Mon Mar 20 2017 09:23:58 GMT+0100 (Central Europe Standard Time)"
}

Comment 3

[Dennis Schubert [:denschub]]

Thanks for the very detailed report! This is a duplicate of bug 1348432, closing as such!