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Youtube HTML5 videos not playing (some)

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So I'm getting a error "Your browser does not currently recognize any of the video formats available" and when clicking the link, it says H.264 and MSE & H.264 are not supported. I used to get the black error screen for a split second before the video would blink and (I'm guessing) select another player and just play normally. Today is the first day that I've had this screen permanently displayed and it only shows up for a few videos. I can watch other videos on the same channel, just one or two that have the error.

It's the same if I try it in Safe Mode or with a new profile. I updated Firefox to 49.0, updated java, updated windows media component, and tried it with "media.windows-media-foundation.enabled" true and on false. No changes

I'm at my wits end with this one! I can watch the videos just fine in Chrome, but would much rather prefer to continue to use firefox as my default browser. Any help is appreciated. Thanks!

So I'm getting a error "Your browser does not currently recognize any of the video formats available" and when clicking the link, it says H.264 and MSE & H.264 are not supported. I used to get the black error screen for a split second before the video would blink and (I'm guessing) select another player and just play normally. Today is the first day that I've had this screen permanently displayed and it only shows up for a few videos. I can watch other videos on the same channel, just one or two that have the error. It's the same if I try it in Safe Mode or with a new profile. I updated Firefox to 49.0, updated java, updated windows media component, and tried it with "media.windows-media-foundation.enabled" true and on false. No changes I'm at my wits end with this one! I can watch the videos just fine in Chrome, but would much rather prefer to continue to use firefox as my default browser. Any help is appreciated. Thanks!
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Giải pháp được chọn

I don't know whether YouTube has changed, or possibly you lost an add-on you used to use that tricked YouTube into using Flash -- because Firefox has never, as far as I know, been able to decode H.264 video on Windows XP.

Example of extension to trick the site into using Flash: https://addons.mozilla.org/firefox/addon/youtube-flash-player/

But actually, your plugins list doesn't show Shockwave Flash at all. Could it have become severely out-of-date and therefore been disabled?

Đọc câu trả lời này trong ngữ cảnh 2

Chi tiết hệ thống bổ sung

Phần bổ trợ đã cài đặt

  • Adobe PDF Plug-In For Firefox and Netscape 11.0.8
  • Citrix Online App Detector Plugin
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  • Foxit PhantomPDF Plug-In For Firefox and Netscape
  • Google Update
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • Next Generation Java Plug-in 11.101.2 for Mozilla browsers
  • Kalydo Player Plugin
  • Office Authorization plug-in for NPAPI browsers
  • The plug-in allows you to open and edit files using Microsoft Office applications
  • DRM Store Netscape Plugin
  • DRM Netscape Network Object
  • Pando Web Plugin
  • PlayOn Browser Plug-in
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
  • Adobe Shockwave for Director Netscape plug-in, version 11.6.6.636
  • Adobe Shockwave for Director Netscape plug-in, version 11.5
  • 5.1.30514.0
  • Unity Player 4.3.5f1
  • VLC media player Web Plugin 2.0.2
  • Npdsplay dll
  • Windows Presentation Foundation (WPF) plug-in for Mozilla browsers

Ứng dụng

  • Firefox 49.0
  • Chuỗi đại diện người dùng: Mozilla/5.0 (Windows NT 5.1; rv:49.0) Gecko/20100101 Firefox/49.0
  • URL hỗ trợ: https://support.mozilla.org/1/firefox/49.0/WINNT/en-US/

Tiện ích mở rộng

  • Adblock Plus 2.7.3 ({d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d})
  • Multi-process staged rollout 1.2 (e10srollout@mozilla.org)
  • Pocket 1.0.4 (firefox@getpocket.com)
  • Tumblr Savior 0.5.0 (jid1-W5guVoyeUR0uBg@jetpack)
  • Web Compat 1.0 (webcompat@mozilla.org)
  • Microsoft .NET Framework Assistant 0.0.0 ({20a82645-c095-46ed-80e3-08825760534b}) (không hoạt động)

Javascript

  • incrementalGCEnabled: True

Đồ họa

  • adapterDescription: NVIDIA GeForce GTX 550 Ti
  • adapterDescription2:
  • adapterDeviceID: 0x1244
  • adapterDeviceID2:
  • adapterDrivers: nv4_disp
  • adapterDrivers2:
  • adapterRAM: Unknown
  • adapterRAM2:
  • adapterSubsysID: 00000000
  • adapterSubsysID2:
  • adapterVendorID: 0x10de
  • adapterVendorID2:
  • crashGuards: []
  • direct2DEnabled: False
  • direct2DEnabledMessage: [u'']
  • directWriteEnabled: False
  • directWriteVersion: 0.0.0.0
  • driverDate: 3-13-2015
  • driverDate2:
  • driverVersion: 6.14.13.4788
  • driverVersion2:
  • featureLog: {u'fallbacks': [], u'features': [{u'status': u'available', u'description': u'Compositing', u'log': [{u'status': u'available', u'type': u'default'}], u'name': u'HW_COMPOSITING'}, {u'status': u'unavailable', u'description': u'Direct3D11 Compositing', u'log': [{u'status': u'available', u'type': u'default'}, {u'status': u'unavailable', u'message': u'Direct3D11 not available on this computer', u'type': u'runtime'}], u'name': u'D3D11_COMPOSITING'}, {u'status': u'available', u'description': u'Direct3D9 Compositing', u'log': [{u'status': u'available', u'type': u'default'}], u'name': u'D3D9_COMPOSITING'}, {u'status': u'unavailable', u'description': u'Direct2D', u'log': [{u'status': u'unavailable', u'message': u'Direct2D is not available on Windows XP', u'type': u'default'}], u'name': u'DIRECT2D'}, {u'status': u'disabled', u'description': u'Direct3D11 hardware ANGLE', u'log': [{u'status': u'available', u'type': u'default'}, {u'status': u'disabled', u'message': u'D3D11 compositing is disabled', u'type': u'env'}], u'name': u'D3D11_HW_ANGLE'}]}
  • info: {u'AzureCanvasAccelerated': 0, u'AzureCanvasBackend': u'skia', u'AzureFallbackCanvasBackend': u'cairo', u'AzureContentBackend': u'cairo'}
  • isGPU2Active: False
  • numAcceleratedWindows: 1
  • numTotalWindows: 1
  • supportsHardwareH264: No; Failed to create H264 decoder
  • webglRenderer: Google Inc. -- ANGLE (NVIDIA GeForce GTX 550 Ti Direct3D9 vs_3_0 ps_3_0)
  • windowLayerManagerRemote: True
  • windowLayerManagerType: Direct3D 9

Thay đổi cài đặt

Linh tinh

  • Người dùng JS: Không
  • Có thể tiếp cận: Không
FredMcD
  • Top 10 Contributor
4341 giải pháp 61070 câu trả lời
Được đăng

Type about:addons<enter> in the address bar to open the Add-ons Manager. Hot key; <Control>(Mac=<Command>) <Shift> A)

On the left side of the page, select Plugins. Make sure the ones you want to use are set to Ask or Allow.


Go to the web page. Once the page is loading, mouse to the address bar and Left click the icon. Select Permissions. In the menu, Make sure the ones you want to use are set to Ask or Allow.

Type '''about:addons'''<enter> in the address bar to open the '''Add-ons Manager.''' Hot key; '''<Control>''(Mac=<Command>)'' <Shift> A)''' On the left side of the page, select '''Plugins.''' Make sure the ones you want to use are set to '''Ask''' or '''Allow.''' -------------- Go to the web page. Once the page is loading, mouse to the address bar and '''Left''' click the icon. Select '''Permissions.''' In the menu, Make sure the ones you want to use are set to '''Ask''' or '''Allow.'''
jscher2000
  • Top 10 Contributor
8886 giải pháp 72700 câu trả lời
Được đăng

Giải pháp được chọn

I don't know whether YouTube has changed, or possibly you lost an add-on you used to use that tricked YouTube into using Flash -- because Firefox has never, as far as I know, been able to decode H.264 video on Windows XP.

Example of extension to trick the site into using Flash: https://addons.mozilla.org/firefox/addon/youtube-flash-player/

But actually, your plugins list doesn't show Shockwave Flash at all. Could it have become severely out-of-date and therefore been disabled?

I don't know whether YouTube has changed, or possibly you lost an add-on you used to use that tricked YouTube into using Flash -- because Firefox has never, as far as I know, been able to decode H.264 video on Windows XP. Example of extension to trick the site into using Flash: https://addons.mozilla.org/firefox/addon/youtube-flash-player/ But actually, your plugins list doesn't show '''Shockwave Flash''' at all. Could it have become severely out-of-date and therefore been disabled?

Câu trả lời hữu ích

jscher2000 said

I don't know whether YouTube has changed, or possibly you lost an add-on you used to use that tricked YouTube into using Flash -- because Firefox has never, as far as I know, been able to decode H.264 video on Windows XP. Example of extension to trick the site into using Flash: https://addons.mozilla.org/firefox/addon/youtube-flash-player/ But actually, your plugins list doesn't show Shockwave Flash at all. Could it have become severely out-of-date and therefore been disabled?

Thanks! Updating Flash did the trick! I'm not sure why it wasn't automatically updating, as that's usually what I have it set on. But I didn't notice it wasn't even in my plugin list anymore, so a second set of eyes definitely helped.

Thanks again :)

''jscher2000 [[#answer-918792|said]]'' <blockquote> I don't know whether YouTube has changed, or possibly you lost an add-on you used to use that tricked YouTube into using Flash -- because Firefox has never, as far as I know, been able to decode H.264 video on Windows XP. Example of extension to trick the site into using Flash: https://addons.mozilla.org/firefox/addon/youtube-flash-player/ But actually, your plugins list doesn't show '''Shockwave Flash''' at all. Could it have become severely out-of-date and therefore been disabled? </blockquote> '''Thanks! '''Updating Flash did the trick! I'm not sure why it wasn't automatically updating, as that's usually what I have it set on. But I didn't notice it wasn't even in my plugin list anymore, so a second set of eyes definitely helped. Thanks again :)