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#1 2015-12-16 06:21:02

xrxr
Member
Registered: 2015-08-01
Posts: 8

[SOLVED] Firefox 43 can't play certain videos via HTML5 on Youtube

After I upgraded to 43 I can't play https://www.youtube.com/watch?v=8sUUWCbA4Fo anymore.
I get the "An error occurred. Please try again later" screen.

Many other videos work, and this plays fine on nightly. Anyone have the same issue?

Last edited by xrxr (2015-12-17 04:38:25)

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#2 2015-12-16 09:00:09

el mariachi
Member
Registered: 2007-11-30
Posts: 595

Re: [SOLVED] Firefox 43 can't play certain videos via HTML5 on Youtube

Same here. In some videos the flashplayer kicks in though, and that's still working like it should

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#3 2015-12-16 09:57:34

8472
Member
From: Slovakia
Registered: 2010-05-15
Posts: 54

Re: [SOLVED] Firefox 43 can't play certain videos via HTML5 on Youtube

same here.
for me all the videos doesn't play via html5 anymore because of that "An error occurred. Please try again later", and browser rather switches to flashplayer sad
I wonder what the mozilla screwed up.


Logic clearly dictates that the needs of the many outweigh the needs of the few.

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#4 2015-12-16 10:54:37

Roysten
Member
Registered: 2014-10-30
Posts: 14

Re: [SOLVED] Firefox 43 can't play certain videos via HTML5 on Youtube

This happened to me as well. In previous version I manually edited some things in about:config regarding html5 video, so that was the cause of the problem. The new Firefox uses ffmpeg by default, instead of gstreamer. To fix it, I set `media.fragmented-mp4.gmp.enabled` to `false`. I hope it works for you as well.

Last edited by Roysten (2015-12-16 10:57:21)

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#5 2015-12-16 11:01:22

8472
Member
From: Slovakia
Registered: 2010-05-15
Posts: 54

Re: [SOLVED] Firefox 43 can't play certain videos via HTML5 on Youtube

Roysten wrote:

This happened to me as well. In previous version I manually edited some things in about:config regarding html5 video, so that was the cause of the problem. The new Firefox uses ffmpeg by default, instead of gstreamer. To fix it, I set `media.fragmented-mp4.gmp.enabled` to `false`. I hope it works for you as well.

perfect, works well again. thank you!


Logic clearly dictates that the needs of the many outweigh the needs of the few.

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#6 2015-12-16 11:12:09

zenlord
Member
From: Belgium
Registered: 2006-05-24
Posts: 1,212
Website

Re: [SOLVED] Firefox 43 can't play certain videos via HTML5 on Youtube

Firefox 43 is compiled to use GTK3, which is incompatible with Adobe Flash. Either use HTML5 or install the Shumway-extension, which is a replacement for Adobe Flash.

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#7 2015-12-16 11:31:00

Tromzy
Member
Registered: 2015-02-15
Posts: 148

Re: [SOLVED] Firefox 43 can't play certain videos via HTML5 on Youtube

Roysten wrote:

This happened to me as well. In previous version I manually edited some things in about:config regarding html5 video, so that was the cause of the problem. The new Firefox uses ffmpeg by default, instead of gstreamer. To fix it, I set `media.fragmented-mp4.gmp.enabled` to `false`. I hope it works for you as well.

Mine is already on "false" and I can't play html5 videos.

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#8 2015-12-16 11:31:34

Tromzy
Member
Registered: 2015-02-15
Posts: 148

Re: [SOLVED] Firefox 43 can't play certain videos via HTML5 on Youtube

zenlord wrote:

Firefox 43 is compiled to use GTK3, which is incompatible with Adobe Flash. Either use HTML5 or install the Shumway-extension, which is a replacement for Adobe Flash.

Have you read the thread ? Html5 videos won't play.

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#9 2015-12-16 12:53:10

Roysten
Member
Registered: 2014-10-30
Posts: 14

Re: [SOLVED] Firefox 43 can't play certain videos via HTML5 on Youtube

8472 wrote:
Roysten wrote:

This happened to me as well. In previous version I manually edited some things in about:config regarding html5 video, so that was the cause of the problem. The new Firefox uses ffmpeg by default, instead of gstreamer. To fix it, I set `media.fragmented-mp4.gmp.enabled` to `false`. I hope it works for you as well.

perfect, works well again. thank you!

You're welcome.

Tromzy wrote:

Mine is already on "false" and I can't play html5 videos.

I tried the video posted by OP and that video doesn't work for me either. I then started Firefox using a new profile (so everything is set to default) and it still doesn't work. So I guess something goes wrong with that specific video (haven't encountered it with different videos).

Last edited by Roysten (2015-12-16 12:54:40)

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#10 2015-12-16 13:40:19

xrxr
Member
Registered: 2015-08-01
Posts: 8

Re: [SOLVED] Firefox 43 can't play certain videos via HTML5 on Youtube

Setting `media.fragmented-mp4.gmp.enabled` to `false` doesn't do it for me.

I found that if I have `media.fragmented-mp4.enabled` set to `false` the video plays fine, however it also disables HD on the site...

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#11 2015-12-16 15:29:48

kabbalah
Member
Registered: 2011-08-23
Posts: 147

Re: [SOLVED] Firefox 43 can't play certain videos via HTML5 on Youtube

Same problem with the video post. I see no solution possible, which have posted is not working.

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#12 2015-12-16 16:37:11

Stebalien
Member
Registered: 2010-04-27
Posts: 1,237
Website

Re: [SOLVED] Firefox 43 can't play certain videos via HTML5 on Youtube

Try spoofing your useragent. I'm using the following user-agent (chromium) on youtube (using UAControl extension to set per-site user agents):

Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.106 Safari/537.36

Steven [ web : git ]
GPG:  327B 20CE 21EA 68CF A7748675 7C92 3221 5899 410C
Do not email: honeypot@stebalien.com

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#13 2015-12-16 18:02:49

mapintar
Member
Registered: 2010-04-17
Posts: 50

Re: [SOLVED] Firefox 43 can't play certain videos via HTML5 on Youtube

Reset all media.*** values in about:config.

Work here.

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#14 2015-12-17 04:09:55

zanny
Member
Registered: 2012-10-05
Posts: 74

Re: [SOLVED] Firefox 43 can't play certain videos via HTML5 on Youtube

Roysten wrote:

This happened to me as well. In previous version I manually edited some things in about:config regarding html5 video, so that was the cause of the problem. The new Firefox uses ffmpeg by default, instead of gstreamer. To fix it, I set `media.fragmented-mp4.gmp.enabled` to `false`. I hope it works for you as well.

My about:config must be at least ten years old. I've probably edited or added more crap to it than Firefox generates itself. But this fixed youtube! Thank you!

Last edited by zanny (2015-12-17 04:10:16)

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#15 2015-12-17 04:36:59

xrxr
Member
Registered: 2015-08-01
Posts: 8

Re: [SOLVED] Firefox 43 can't play certain videos via HTML5 on Youtube

Stebalien wrote:

Try spoofing your useragent. I'm using the following user-agent (chromium) on youtube (using UAControl extension to set per-site user agents):

Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.106 Safari/537.36

Wow this actually works for me.. Youtube uses vp9 to decode the video now and it plays fine.

Using block UA actually works better because with the Chrome UA Youtube would try to use webp for thumbnails.

Thanks!

Last edited by xrxr (2015-12-17 04:42:14)

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#16 2015-12-17 08:30:50

foutrelis
Developer
From: Athens, Greece
Registered: 2008-07-28
Posts: 678
Website

Re: [SOLVED] Firefox 43 can't play certain videos via HTML5 on Youtube

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#17 2015-12-17 13:30:35

Boris Bolgradov
Member
From: Bulgaria
Registered: 2008-07-27
Posts: 185

Re: [SOLVED] Firefox 43 can't play certain videos via HTML5 on Youtube

Hey,

I just want to share my experience after last night.

After I updated Firefox to the latest version (43.0-2) both of my profiles were broken. They loaded fine, but video playback didn't work (e.g. in youtube and a local video site) (HTML5; I haven't tested flash, as I don't have it installed).
It worked in new profiles, but not in existing.
I managed to fix them by refreshing/resetting them (menu - help - troubleshooting information - reset firefox).
Note: extensions are removed and need to be reinstalled afterwards.

I don't know why it happened and if anyone else has this problem, but if you do this is a possible solution.

Happy holidays!
- Boris

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#18 2015-12-17 13:36:42

WorMzy
Forum Moderator
From: Scotland
Registered: 2010-06-16
Posts: 7,611
Website

Re: [SOLVED] Firefox 43 can't play certain videos via HTML5 on Youtube

Mod note: Merging with the existing thread


Sakura:-
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Making lemonade from lemons since 2015.

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#19 2015-12-17 13:41:15

Goresome
Member
From: Russia
Registered: 2011-12-06
Posts: 67

Re: [SOLVED] Firefox 43 can't play certain videos via HTML5 on Youtube

It is strange you guys get issues with h264, both html5test and youtube say ff43 does not support h264, and I have every gst-* package and ffmpeg

MPEG-4 ASP support
	
No ✘
H.264 support
	
No ✘

EDIT:  Nvm, media.fragmented-mp4.gmp.enabled is off by default and enabling it enabled the latter.

Last edited by Goresome (2015-12-17 13:44:21)

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#20 2015-12-17 13:44:25

Boris Bolgradov
Member
From: Bulgaria
Registered: 2008-07-27
Posts: 185

Re: [SOLVED] Firefox 43 can't play certain videos via HTML5 on Youtube

Thanks, WorMzy, I guess I should've checked here last night before I spent an hour on this! smile
I really did change media.fragmented-mp4.* settings at one point, so probably that was my problem as well.

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#21 2015-12-19 00:07:22

abdullah
Member
Registered: 2014-06-10
Posts: 34

Re: [SOLVED] Firefox 43 can't play certain videos via HTML5 on Youtube

I got 43.0.1,
I just put media.fragmented-mp4.gmp.enabled to false, some of HD videos worked, your link is not playing though.
Every thing was fine before 43.
I even see some wired black lines & duplicated words while typing.

94099225197344772148.png

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#22 2015-12-20 15:49:55

josealb77
Member
Registered: 2013-06-23
Posts: 83

Re: [SOLVED] Firefox 43 can't play certain videos via HTML5 on Youtube

Roysten wrote:

This happened to me as well. In previous version I manually edited some things in about:config regarding html5 video, so that was the cause of the problem. The new Firefox uses ffmpeg by default, instead of gstreamer. To fix it, I set `media.fragmented-mp4.gmp.enabled` to `false`. I hope it works for you as well.

Thank you Roysten, this worked for me too.

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#23 2015-12-20 20:06:59

SajeOne
Member
Registered: 2015-12-20
Posts: 1

Re: [SOLVED] Firefox 43 can't play certain videos via HTML5 on Youtube

Same issue here. Tried resetting firefox, user agent spoofing, setting `media.fragmented-mp4.gmp.enabled` to `false` (was there by default) and still no luck hmm

EDIT(SOLVED): I don't know exactly why this fixed it but I installed pulse audio and restarted teamspeak(client) I had running and the videos started playing fine. Hope that helps someone.

Last edited by SajeOne (2015-12-20 20:16:18)

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#24 2015-12-21 08:03:06

foutrelis
Developer
From: Athens, Greece
Registered: 2008-07-28
Posts: 678
Website

Re: [SOLVED] Firefox 43 can't play certain videos via HTML5 on Youtube

In firefox 43.0.1-2 the "media.fragmented-mp4.gmp.enabled" pref is now ignored and also OP's video should work without having to change the user agent string.

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