Could not find tag for codec none in stream #0, codec not currently supported in container - incorrect codec parameters ? · Issue #48 · hadronepoch/PHP-FFmpeg-video-streaming · GitHub
Encoding VP9 in FFmpeg: An Update - Streaming Learning Center
ffmpeg - Wrong video file header causes video players to fail. Any suggestions for recovering? - Super User
ffmpeg - Wrong video file header causes video players to fail. Any suggestions for recovering? - Super User