You can check the Web Console for media related messages.

• https://developer.mozilla.org/en-US/docs/Tools/Web_Console

Make sure you have the latest FFmpeg and libavcodec packages installed.

If you use extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) that can block content (Adblock Plus, NoScript, DuckDuckGo PE, Disconnect, Ghostery, Privacy Badger, uBlock Origin) always make sure such extensions do not block content.

• make sure your extensions and filters are updated to the latest version
• https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems

Firefox shows a purple shield instead of a gray shield at the left end of the location/address bar in case Enhanced Tracking Protection is blocking content.

• click the shield icon for more detail and possibly disable the protection

You can check the Web Console for relevant-looking messages about blocked content.

• https://support.mozilla.org/en-US/kb/enhanced-tracking-protection-firefox-desktop
• https://support.mozilla.org/en-US/kb/smartblock-enhanced-tracking-protection
• https://support.mozilla.org/en-US/kb/trackers-and-scripts-firefox-blocks-enhanced-track

You can try these steps in case of issues with webpages:

You can reload webpage(s) and bypass the cache to refresh possibly outdated or corrupted files.

• hold down the Shift key and left-click the Reload button
• press "Ctrl + F5" or press "Ctrl + Shift + R" (Windows,Linux)
• press "Command + Shift + R" (Mac)

Clear the Cache and remove the Cookies for websites that cause problems via the "3-bar" Firefox menu button (Settings).

"Remove the Cookies" for websites that cause problems:

• Settings -> Privacy & Security
  Cookies and Site Data: "Manage Data"

"Clear the Cache":

• Settings -> Privacy & Security
  Cookies and Site Data -> Clear Data -> [X] Cached Web Content -> Clear

• https://support.mozilla.org/en-US/kb/clear-cookies-and-site-data-firefox
• https://support.mozilla.org/en-US/kb/how-clear-firefox-cache

Start Firefox in Troubleshoot Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration or userChrome.css is causing the problem.

• switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Themes
• do NOT click the "Refresh Firefox" button on the Troubleshoot Mode start window

• https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode
• https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems

• https://support.mozilla.org/en-US/kb/enhanced-tracking-protection-firefox-desktop
• https://support.mozilla.org/en-US/kb/smartblock-enhanced-tracking-protection
• https://support.mozilla.org/en-US/kb/trackers-and-scripts-firefox-blocks-enhanced-track

Hi,

Attempts to (re)install ffmpeg and libavcodec resulted in errors. After adding --allowerasing and --skip-broken to the command I got the following output:

> sudo dnf install ffmpeg libavcodec-free --allowerasing --skip-broken Laatste metadata-expiratie-check: 0:02:04 geleden op di 13 sep 2022 12:27:48 CEST. Pakket libavcodec-free-5.0.1-11.fc36.x86_64 is al geïnstalleerd. Afhankelijkheden opgelost.

Probleem: pakket ffmpeg-libs-5.0.1-3.fc36.x86_64 conflicteert met libavcodec-free aangeboden door libavcodec-free-5.0.1-11.fc36.x86_64

- pakket ffmpeg-5.0.1-3.fc36.x86_64 vereist ffmpeg-libs(x86-64) = 5.0.1-3.fc36, maar niets van de aanbieders kan worden geïnstalleerd
- kan de beste kandidaat voor de taak niet installeren (can't install best candidate)
- tegenstrijdige verzoeken (contradicting requests)

==================================================================

Pakket Architectuur Versie Repo Grootte

==================================================================

Conflicterende pakketten overslaan: (voeg '--best' toe aan opdrachtregel om upgrade te forceren): ffmpeg-libs x86_64 5.0.1-3.fc36 rpmfusion-free 8.7 M Pakketten overslaan met defecte afhankelijkheden : (skip defects) ffmpeg x86_64 5.0.1-3.fc36 rpmfusion-free 1.6 M

Transactie-overzicht

==================================================================

Overslaan 2 Pakketten

Installing ffmpeg gave this output:

> sudo dnf install ffmpeg Laatste metadata-expiratie-check: 0:02:29 geleden op di 13 sep 2022 12:27:48 CEST. Fout: Probleem: probleem met geïnstalleerd pakket libswscale-free-5.0.1-11.fc36.x86_64

- pakket ffmpeg-libs-5.0.1-3.fc36.x86_64 conflicteert met libswscale-free aangeboden door libswscale-free-5.0.1-11.fc36.x86_64
- pakket ffmpeg-libs-5.0.1-3.fc36.x86_64 conflicteert met libswscale-free aangeboden door libswscale-free-5.0.1-1.fc36.x86_64
- pakket ffmpeg-5.0.1-3.fc36.x86_64 vereist ffmpeg-libs(x86-64) = 5.0.1-3.fc36, maar niets van de aanbieders kan worden geïnstalleerd
- tegenstrijdige verzoeken

After removing libswscale-free, the next attempt to install ffmpeg learned me that there were conflicts with libswresample. After removing libswresample, I was able to reinstall ffmpeg but I still cannot install libavcodec, due to conflicts with ffmpeg-libs.

I also tried to reinstall libswscale and libswresample but both installs tried to remove ffmpeg, ffmpwg-libs and libavdevice. > sudo dnf install libswscale-free-devel --allowerasing Laatste metadata-expiratie-check: 0:34:56 geleden op di 13 sep 2022 12:35:20 CEST. Afhankelijkheden opgelost.

==================================================================

Pakket Architectuur Versie Repo Grootte

==================================================================

Installeren: libswscale-free-devel x86_64 5.0.1-11.fc36 updates Afhankelijkheden installeren: (dependencies) codec2 x86_64 1.0.1-2.fc36 fedora libavcodec-free x86_64 5.0.1-11.fc36 updates libavutil-free x86_64 5.0.1-11.fc36 updates libavutil-free-devel x86_64 5.0.1-11.fc36 updates libswresample-free x86_64 5.0.1-11.fc36 updates libswscale-free x86_64 5.0.1-11.fc36 updates lpcnetfreedv x86_64 0.2-11.fc36 fedora Afhankelijke pakketten verwijderen: (delete) ffmpeg x86_64 5.0.1-3.fc36 @rpmfusion-free ffmpeg-libs x86_64 5.0.1-3.fc36 @rpmfusion-free libavdevice x86_64 5.0.1-3.fc36 @rpmfusion-free Transactie-overzicht

What is the best way to resolve the conflicts (and reinstall libswscale and libswresample)

Ben

______________________________

On 12-09-2022 23:16, Mozilla Support Forum <no-reply@support.mozilla.org> wrote: > Mozilla Support > > > Some video content can not be displayed.

After a reboot everything seems to be working. I don't know if it was the reboot or the removal of libwscale or libresample which solved the problem.