HTML5 video not working, firefox suggests installing Windows media features even though I am not on N or KN version of Windows 10
I am running the latest version of Firefox, and the latest version of Windows 10 Education (NOT an N or KN version of Windows). I get a bar at the top of the window telling me to install Windows Media Features. HTML5test.com says that my browser doesn't support MPEG-4 ASP, H.264, or H.265. I tried running in safemode and get the same issues. Chrome is able to play videos that Firefox is not on this machine. I also tried uninstalling and reinstalling Firefox. I think these problems /may/ have been caused by a Windows update, but that's just a hunch.
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https://support.mozilla.org/en-US/kb/fix-common-audio-and-video-issues
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Application Basics
Name: Firefox Version: 69.0.1 Build ID: 20190917135527 Update Channel: release User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:69.0) Gecko/20100101 Firefox/69.0 OS: Windows_NT 10.0 Launcher Process: Enabled Multiprocess Windows: 2/2 Enabled by default Remote Processes: 7 Enterprise Policies: Inactive Google Location Service Key: Found Google Safebrowsing Key: Found Mozilla Location Service Key: Found Safe Mode: false
Crash Reports for the Last 3 Days
Firefox Features
Name: Firefox Monitor Version: 3.0 ID: fxmonitor@mozilla.org
Name: Firefox Screenshots Version: 39.0.0 ID: screenshots@mozilla.org
Name: Form Autofill Version: 1.0 ID: formautofill@mozilla.org
Name: Web Compat Version: 6.1.0 ID: webcompat@mozilla.org
Name: WebCompat Reporter Version: 1.1.0 ID: webcompat-reporter@mozilla.org
Remote Processes
Type: Web Content Count: 5 / 8
Type: Extension Count: 1
Type: GPU Count: 1
Extensions
Name: Amazon.com Version: 1.1 Enabled: true ID: amazondotcom@search.mozilla.org
Name: Bing Version: 1.0 Enabled: true ID: bing@search.mozilla.org
Name: DuckDuckGo Version: 1.0 Enabled: true ID: ddg@search.mozilla.org
Name: eBay Version: 1.0 Enabled: true ID: ebay@search.mozilla.org
Name: Enhancer for YouTube™ Version: 2.0.98.2 Enabled: true ID: enhancerforyoutube@maximerf.addons.mozilla.org
Name: EPUBReader Version: 2.0.9 Enabled: true ID: {5384767E-00D9-40E9-B72F-9CC39D655D6F}
Name: Facebook Container Version: 2.0.2 Enabled: true ID: @contain-facebook
Name: Google Version: 1.0 Enabled: true ID: google@search.mozilla.org
Name: Google Reverse Image Search Version: 64.1.0 Enabled: true ID: {95322c08-05ff-4f3c-85fd-8ceb821988dd}
Name: GSConnect Version: 6 Enabled: true ID: gsconnect@andyholmes.github.io
Name: Honey Version: 11.6.3 Enabled: true ID: jid1-93CWPmRbVPjRQA@jetpack
Name: Imagus Version: 0.9.8.72 Enabled: true ID: {00000f2a-7cde-4f20-83ed-434fcb420d71}
Name: Notifier for Gmail™ Version: 0.9.6 Enabled: true ID: jid0-GjwrPchS3Ugt7xydvqVK4DQk8Ls@jetpack
Name: Octotree Version: 3.0.8 Enabled: true ID: jid1-Om7eJGwA1U8Akg@jetpack
Name: Pay by Privacy.com Version: 1.3.21 Enabled: true ID: privacy@privacy.com
Name: Reddit Enhancement Suite Version: 5.16.10 Enabled: true ID: jid1-xUfzOsOFlzSOXg@jetpack
Name: SmartProxy Version: 0.8.7 Enabled: true ID: smartproxy@salarcode.com
Name: Strict Pop-up Blocker Version: 0.6 Enabled: true ID: jid1-P34HaABBBpOerQ@jetpack
Name: Tags for YouTube™ Version: 8.4 Enabled: true ID: jid0-cBh0nRMLV5BY1dlp33s3g7dFXLY@jetpack
Name: To Google Translate Version: 3.10 Enabled: true ID: jid1-93WyvpgvxzGATw@jetpack
Name: Twitter Version: 1.0 Enabled: true ID: twitter@search.mozilla.org
Name: uBlock Origin Version: 1.22.4 Enabled: true ID: uBlock0@raymondhill.net
Name: Wikipedia (en) Version: 1.0 Enabled: true ID: wikipedia@search.mozilla.org
Name: Windscribe VPN Version: 2.4.3 Enabled: true ID: @windscribeff
Security Software
Type: Windows Defender Antivirus
Type:
Type: Windows Firewall
Graphics
Features Compositing: WebRender Asynchronous Pan/Zoom: wheel input enabled; scrollbar drag enabled; keyboard enabled; autoscroll enabled WebGL 1 Driver WSI Info: EGL_VENDOR: Google Inc. 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(adapter LUID: 000000000000bfb9) EGL_VERSION: 1.4 (ANGLE 2.1.0.21dccd386996) EGL_EXTENSIONS: EGL_EXT_create_context_robustness EGL_ANGLE_d3d_share_handle_client_buffer EGL_ANGLE_d3d_texture_client_buffer EGL_ANGLE_surface_d3d_texture_2d_share_handle EGL_ANGLE_query_surface_pointer EGL_ANGLE_window_fixed_size EGL_ANGLE_keyed_mutex EGL_ANGLE_surface_orientation EGL_ANGLE_direct_composition EGL_NV_post_sub_buffer EGL_KHR_create_context EGL_EXT_device_query EGL_KHR_image EGL_KHR_image_base EGL_KHR_gl_texture_2D_image EGL_KHR_gl_texture_cubemap_image EGL_KHR_gl_renderbuffer_image EGL_KHR_get_all_proc_addresses EGL_KHR_stream EGL_KHR_stream_consumer_gltexture EGL_NV_stream_consumer_gltexture_yuv Had to cut it off, too many characters
Is this with many websites, some, a few?
Make sure you are not blocking content.
Start Firefox in Safe Mode {web link}
A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?
One issue that seems more common lately is Firefox's Content Blocking. When it is blocking content in a page, a shield icon will appear at the left end of the address bar next to the padlock icon. This article has more info on managing this feature:
The problem is with any website using HTML5 video. I've especially noticed this on Youtube, certain videos will not play at all, especially newer uploads. The problem persists in safe mode. I think the problem may be specifically with mp4 videos, as webm's work normally. For example, if I visit this page https://tools.woolyss.com/html5-audio-video-tester/?u=download.opencontent.netflix.com.s3.amazonaws.com/AV1/Chimera/Chimera-AV1-10bit-768x432-1090kbps.mp4 I get "No video with supported format and MIME type found." even in safe mode. The video plays as expected in Chrome. I don't have a shield icon, but I do get this connection not secure warning.
This is very interesting. I had the same problem.
However, my download manager add-on saw the clip, and I was able to download it. It played, but no audio.
This is a MP4 file that is downloaded from Netflix via an open HTTP link. The server doesn't have a certificate installed, so if you would force a secure connection or disallow loading insecure content (mixed passive content)) then the video will fail (security.mixed_content.block_display_content = false).
<source src="http://download.opencontent.netflix.com.s3.amazonaws.com/AV1/Chimera/Chimera-AV1-10bit-768x432-1090kbps.mp4">
Update: I tried to watch something on Prime Video, and got this error. Widevine is up to date and always enabled on my machine. Is there a way I could uninstall and reinstall it? Also, I tried switching the flag you mentioned and I still have the same issues.
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