Fix 'ffmpeg command not found' in PHP exec()
When you call exec('ffmpeg ...') in PHP and get ffmpeg command not found
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Windows Activation Dependency Conflict via Safe Mode
If you see an error like “Windows can’t activate right now” or “We can’t activate Wi...
Fix Windows Update Setup Failed Rollback Changes
When a Windows update fails and you see "Undoing changes" or "We couldn't complete the updates, u...
How to Fix Windows Activation Stuck on Sign-In Screen
If you're stuck at the Windows sign-in screen with an activation prompt that won't go away, you'r...
Fix Remote Desktop Authentication Error Occurred
You try to connect to a remote PC and see: "An authentication error has occurred. The Local S...
Windows Defender Offline Scan Not Working: Practical Fixes
You run a Windows Defender offline scan to remove stubborn malware, but the scan either fails to ...
Topic paths
Quick titles
How to Resolve Outlook 502 Bad Gateway After UpdateWindows Login Loop After Update: Troubleshooting GuideUnlock Outlook PST File Stuck After Crash Recoverynpm Dependency Tree Conflict GuideWindows Security Blank Screen in Safe Mode FixWindows Security Error Fix ChecklistFix Cloudflare 525 SSL Handshake Error – ChecklistReduce Outlook Memory Usage: IT Admin Guide